<?xml version="1.0" encoding="utf-8"?><feed xmlns="http://www.w3.org/2005/Atom" ><generator uri="https://jekyllrb.com/" version="3.10.0">Jekyll</generator><link href="https://lilacsat.github.io/feed.xml" rel="self" type="application/atom+xml" /><link href="https://lilacsat.github.io/" rel="alternate" type="text/html" /><updated>2026-07-01T09:17:34+08:00</updated><id>https://lilacsat.github.io/feed.xml</id><title type="html">LilacSat - Student Satellite Project of HIT</title><subtitle>哈尔滨工业大学紫丁香学生微纳卫星团队
</subtitle><author><name>Your Name</name></author><entry><title type="html">2026 International Space Communication Challenge — Invitation to Participate (First Announcement)</title><link href="https://lilacsat.github.io/2026/07/01/2026-International-Space-Communication-Challenge-Invitation-to-Participate-(First-Announcement).html" rel="alternate" type="text/html" title="2026 International Space Communication Challenge — Invitation to Participate (First Announcement)" /><published>2026-07-01T00:00:00+08:00</published><updated>2026-07-01T00:00:00+08:00</updated><id>https://lilacsat.github.io/2026/07/01/2026-International-Space-Communication-Challenge-%E2%80%94-Invitation-to-Participate-(First-Announcement)</id><content type="html" xml:base="https://lilacsat.github.io/2026/07/01/2026-International-Space-Communication-Challenge-Invitation-to-Participate-(First-Announcement).html"><![CDATA[<h1 id="️-2026-international-space-communication-challenge">🛰️ 2026 International Space Communication Challenge</h1>

<h3 id="space-communication-track-of-the-2026-international-aeronautics-and-astronautics-challenge--invitation-to-participate-first-announcement">Space Communication Track of the 2026 International Aeronautics and Astronautics Challenge — Invitation to Participate (First Announcement)</h3>

<blockquote>
  <p><strong>Chinese name:</strong> 2026 国际空间通信挑战赛（2026 国际空天挑战赛空间通信赛道）</p>
</blockquote>

<p>The 2026 International Space Communication Challenge (Space Communication Track of the 2026 International Aeronautics and Astronautics Challenge) is an international aerospace-communication science and technology competition jointly hosted by the <strong>Harbin Institute of Technology (HIT)</strong> and the <strong>Beijing University of Posts and Telecommunications (BUPT)</strong>. The competition is open to university and secondary-school students, amateur radio enthusiasts, and professionals in space communication worldwide. The relevant details are announced below.</p>

<hr />

<h2 id="1-competition-name">1. Competition Name</h2>

<table>
  <thead>
    <tr>
      <th style="text-align: left">Item</th>
      <th style="text-align: left">Name</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td style="text-align: left"><strong>Chinese</strong></td>
      <td style="text-align: left">2026 国际空间通信挑战赛（2026 国际空天挑战赛空间通信赛道）</td>
    </tr>
    <tr>
      <td style="text-align: left"><strong>English</strong></td>
      <td style="text-align: left">2026 International Space Communication Challenge</td>
    </tr>
  </tbody>
</table>

<hr />

<h2 id="2-mission-and-purpose">2. Mission and Purpose</h2>

<p>The competition focuses on frontier directions including <strong>satellite communication, deep-space exploration, space-based networks, space tracking, telemetry &amp; command (TT&amp;C), and amateur satellite applications</strong>. It aims to build an innovation and practice platform for university and secondary-school students and space-communication enthusiasts worldwide.</p>

<p>The competition encourages teams to deeply integrate theory with engineering practice through hardware development, scheme design, live-contact testing, and data analysis — comprehensively strengthening skills in system design, innovative application, and international collaboration, and cultivating versatile talent with an international outlook and engineering competence.</p>

<hr />

<h2 id="3-organizing-bodies">3. Organizing Bodies</h2>

<p><strong>Host Institutions</strong>
Harbin Institute of Technology; Beijing University of Posts and Telecommunications</p>

<p><strong>Advisory Institutions</strong>
Asia-Pacific Space Cooperation Organization (APSCO); Shanghai Institute of Satellite Engineering; Amateur Radio Branch of the Chinese Radio Association; Technical Committee on Fault-Tolerant Computing of the China Computer Federation (CCF)</p>

<p><strong>Co-organizers</strong>
Student Amateur Radio Association of the University of Science and Technology of China; Youth Science &amp; Technology Museum of Dongcheng District, Beijing; Shanghai ASES Space Technology Co., Ltd.; Foshan South China Radio Club; Heilongjiang Radio Sports Association</p>

<p><strong>Supporting &amp; Sponsoring Institutions</strong>
CAS Space Technology Co., Ltd.; Beijing Aerospace Yuxing Technology Co., Ltd.; ZhongkeTiansuan (Shanghai) Information Technology Co., Ltd.</p>

<hr />

<h2 id="4-eligibility">4. Eligibility</h2>

<p>The competition is open to university and secondary-school students and space-communication enthusiasts worldwide. Participants include, but are not limited to:</p>

<ul>
  <li>Undergraduate and graduate students at universities in China and abroad;</li>
  <li>Secondary-school students, vocational-school students, and youth science-and-technology innovation teams;</li>
  <li>University student science clubs, amateur radio associations, and aerospace innovation teams;</li>
  <li>Amateur radio operators, satellite-communication enthusiasts, and space-science education teams;</li>
  <li>Joint teams formed across schools, regions, and countries.</li>
</ul>

<hr />

<h2 id="5-schedule-and-venue">5. Schedule and Venue</h2>

<p>The competition is organized as a combination of <strong>on-site concentrated activities and global remote participation</strong>.</p>

<ul>
  <li><strong>Dates:</strong> July 20 – 24, 2026</li>
  <li><strong>Main on-site venue:</strong> Harbin Institute of Technology, Nangang District, Harbin</li>
  <li><strong>Globally open track:</strong> Satellite Enigma Race may be conducted from anywhere in the world</li>
</ul>

<blockquote>
  <p>The exact schedule and reporting location are subject to the official notice issued later by the Organizing Committee.</p>
</blockquote>

<hr />

<h2 id="6-competition-tracks">6. Competition Tracks</h2>

<p>The competition comprises <strong>six tracks</strong>. Details and requirements for each are as follows.</p>

<h3 id="61spacecom-maker-匠造空间通信">6.1　SpaceCom Maker (匠造空间通信)</h3>

<p>Aimed at physical works related to space communication, this track encourages teams to develop hardware and demonstrate systems in directions such as <strong>satellite communication, ground stations, radio reception, antenna systems, communication payloads, signal processing, and demonstration apparatus</strong>. Teams submit physical works and present, demonstrate, and technically explain them on-site in Harbin.</p>

<p><strong>Scoring:</strong> Scored on-site by all participating team members present in Harbin (excluding members of the team being scored); ranked by total score.</p>

<h3 id="62amateur-satellite-concept-业余卫星创想">6.2　Amateur Satellite Concept (业余卫星创想)</h3>

<p>Teams are encouraged to propose innovative amateur-satellite design schemes based on a <strong>6U CubeSat</strong>, with emphasis on mission concept, system design, communication scheme, engineering feasibility, and application value. Teams submit design schemes and give a presentation and defense on-site in Harbin.</p>

<p><strong>Scoring:</strong> Scored on-site by all participating team members present in Harbin (excluding members of the team being scored); ranked by total score.</p>

<h3 id="63radio-wave-duel-电波对决争锋">6.3　Radio Wave Duel (电波对决争锋)</h3>

<p>This track simulates a satellite-communication scenario under <strong>shared spectrum, limited resources, and complex electromagnetic interference</strong>, emphasizing teams’ comprehensive abilities in communication-system design, protocol optimization, link maintenance, anti-jamming transmission, and effective data exchange.</p>

<p>Each team must use the equipment uniformly provided by the Organizing Committee to independently design and build a communication system: within the designated frequency band, one SDR device transmits and another SDR device receives, with the transmitted/received content being random data files provided by the Committee. All teams operate simultaneously in the same venue; every team’s transmitted signal constitutes active interference to the others, so each team must account for and resist various forms of interference from other teams in its system design. Computers used in the competition must have all communication interfaces other than the SDR disabled, ensuring a fair and controllable environment.</p>

<p><strong>Scoring:</strong> The judging panel ranks teams by the amount of random data correctly demodulated; the team demodulating the most valid data wins.</p>

<h3 id="64weather-satellite-reception-天线追风捕云">6.4　Weather Satellite Reception (天线追风捕云)</h3>

<p>This track simulates the <strong>rapid-deployment task</strong> of a real meteorological-satellite ground receiving station. Within the time limit, teams must complete feed fabrication, receiving-system assembly, and tuning, successfully capture the downlink signals of geostationary meteorological satellites, and demodulate/recover valid cloud imagery (including but not limited to <strong>FY-2G/H, GK-2A</strong>, etc.).</p>

<p>The organizers uniformly provide the antenna, mounts, filters, amplifiers, RF cables, receiver, decoding software, and necessary tools; teams may replace any component except the antenna reflector.</p>

<p><strong>Scoring:</strong> Comprehensive scoring based on system-assembly quality, number of valid image frames, image completeness, and number of satellites received (different bands or modes of the same satellite count as different satellites).</p>

<h3 id="65deep-space-tracking-深空追迹定轨">6.5　Deep-Space Tracking (深空追迹定轨)</h3>

<p>This track simulates the <strong>measurement task of a deep-space exploration ground station</strong>. Within the time limit, teams must complete receiving-system assembly and tuning, and perform signal reception, Doppler-shift measurement, and orbit determination for targets such as <strong>Tiandu-1</strong>.</p>

<p>The organizers uniformly provide the antenna, mounts, filters, amplifiers, RF cables, receiver, and necessary tools; teams may replace any component except the antenna reflector. If uncontrollable factors such as weather affect on-site observation, the organizers will uniformly provide backup measurement data for subsequent processing.</p>

<p><strong>Scoring:</strong> Comprehensive scoring based on system-assembly quality, measurement-data quality, and orbit-determination accuracy.</p>

<h3 id="66satellite-enigma-race-逐星解谜竞速">6.6　Satellite Enigma Race (逐星解谜竞速)</h3>

<p>This globally open <strong>amateur satellite-contact activity</strong> encourages teams to receive satellite telemetry signals faster and better. Within the designated competition window, teams or individuals earn points by receiving special telemetry signals from the <strong>ASRTU-1 “Friendship” satellite</strong> and performing decoding and puzzle-solving operations.</p>

<blockquote>
  <p>Matters not covered for each track (detailed rules, equipment requirements, scoring criteria, etc.) are subject to technical documents released later by the Organizing Committee. Throughout the competition, teams must retain raw measurement data and processing code for review by the judging panel.</p>
</blockquote>

<hr />

<h2 id="7-rules-of-participation">7. Rules of Participation</h2>

<h3 id="71team-formation">7.1　Team Formation</h3>

<p>Participants may compete individually or as teams. Joint teams across schools, regions, and countries are encouraged, with no restriction on members’ affiliations. No individual may register for the same track under more than one team. After registration closes, team membership may in principle not be changed; in genuinely exceptional cases, a written request must be submitted to the Organizing Committee and approved before any adjustment. A single team (including an individual) may register for one or more tracks according to their strengths, and each track’s results are calculated independently. Team-size limits per track:</p>

<table>
  <thead>
    <tr>
      <th style="text-align: left">Track</th>
      <th style="text-align: center">Team Size</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td style="text-align: left">SpaceCom Maker</td>
      <td style="text-align: center">1 – 6</td>
    </tr>
    <tr>
      <td style="text-align: left">Amateur Satellite Concept</td>
      <td style="text-align: center">1 – 6</td>
    </tr>
    <tr>
      <td style="text-align: left">Radio Wave Duel</td>
      <td style="text-align: center">2 – 6</td>
    </tr>
    <tr>
      <td style="text-align: left">Weather Satellite Reception</td>
      <td style="text-align: center">1 – 6</td>
    </tr>
    <tr>
      <td style="text-align: left">Deep-Space Tracking</td>
      <td style="text-align: center">1 – 6</td>
    </tr>
    <tr>
      <td style="text-align: left">Satellite Enigma Race</td>
      <td style="text-align: center">1 – 6</td>
    </tr>
  </tbody>
</table>

<h3 id="72fairness">7.2　Fairness</h3>

<p>All teams must abide by the competition rules and must not falsify data, misappropriate others’ work, maliciously interfere with other teams, use external data in violation of the rules, or exceed power limits.</p>

<h3 id="73safety">7.3　Safety</h3>

<p>When radio transmission, antenna erection, outdoor equipment installation, power systems, and RF equipment are involved, teams must comply with safety regulations.</p>

<h3 id="74intellectual-property">7.4　Intellectual Property</h3>

<p>Intellectual property of entries in principle belongs to the participating teams. Teams must ensure that their works, schemes, software, images, data, and reports do not infringe upon any rights.</p>

<h3 id="75delegations">7.5　Delegations</h3>

<p>For this edition, the <strong>“delegation”</strong> is the unit for selecting the Overall Champion, Runner-up, and Second Runner-up. A delegation may consist of multiple teams from the same school, the same institution, or a joint entry, each registering for the various tracks separately. Members of different teams within the same delegation may be shared across teams, but no individual may join more than one delegation. Each delegation must designate a contact person responsible for communication and coordination with the Organizing Committee on all track matters within the delegation. Teams are identified by the team name entered at registration; the delegation is used only for overall-ranking calculation.</p>

<hr />

<h2 id="8-awards">8. Awards</h2>

<h3 id="81track-awards">8.1　Track Awards</h3>

<p>For each track, <strong>First, Second, Third, and Merit prizes</strong> are established according to the number of participating teams and their results, with certificates issued. The top three in each track receive Champion / Runner-up / Second Runner-up certificates, along with trophies, aerospace models, cultural-creative products, and other rewards. Outstanding teams may receive corporate internship recommendations, media promotion, and opportunities for follow-on project collaboration.</p>

<h3 id="82overall-awards">8.2　Overall Awards</h3>

<p>The competition awards an <strong>Overall Champion, Runner-up, and Second Runner-up</strong>, determined by the comprehensive performance of each delegation across the tracks it entered. A delegation may consist of one or more teams; teams are identified by their registered names, and the delegation is used only for overall ranking.</p>

<p><strong>Scoring Rule</strong></p>

<p>Each track assigns points by team ranking: 1st place scores 100 and last place scores 10, with intermediate places distributed linearly and evenly between 100 and 10 in rank order. For a total of <em>N</em> participating teams:</p>

<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>Score of rank r = 100 − (r − 1) × (100 − 10) / (N − 1)
</code></pre></div></div>

<p>(Results are rounded to the nearest integer; if only one team competes, it scores 100.)</p>

<p>Each track’s score is credited to the delegation to which the team belongs. If a delegation has multiple teams in the same track, only the highest score in that track counts toward the delegation’s total — scores are not accumulated.</p>

<p>Each delegation’s total is the sum of its <strong>four best track scores</strong>, and these must <strong>include at least one of “SpaceCom Maker” and “Amateur Satellite Concept.”</strong> Delegations are ranked from highest to lowest total and awarded Overall Champion, Runner-up, and Second Runner-up accordingly.</p>

<p><strong>Tie-breaking order:</strong> ① the delegation entering more tracks ranks higher; ② the higher top score in a common track ranks higher; ③ if still tied, the Arbitration Committee decides based on the technical difficulty, innovation, or completeness of the entered projects.</p>

<p>If a delegation enters fewer than four tracks, its total is computed from the tracks actually entered and it may still be ranked.</p>

<p><strong>Rewards for the Overall Top Three</strong> (first-choose-first-served; each reward limited to one team; no duplication)</p>

<table>
  <thead>
    <tr>
      <th style="text-align: center">Priority</th>
      <th style="text-align: left">Reward</th>
      <th style="text-align: left">Sponsor</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td style="text-align: center">1</td>
      <td style="text-align: left">Free satellite launch (Kinetica-1, 7 kg, or Kinetica-2, 15 kg)</td>
      <td style="text-align: left">CAS Space</td>
    </tr>
    <tr>
      <td style="text-align: center">2</td>
      <td style="text-align: left">Free antenna time (LEO satellite TT&amp;C, 365 passes)</td>
      <td style="text-align: left">Aerospace Yuxing</td>
    </tr>
    <tr>
      <td style="text-align: center">3</td>
      <td style="text-align: left">Free in-orbit hosting (1 kg satellite payload to orbit)</td>
      <td style="text-align: left">ZhongkeTiansuan</td>
    </tr>
  </tbody>
</table>

<blockquote>
  <p>The Overall Champion, Runner-up, and Second Runner-up choose in ranking order. Specific fulfillment conditions, payload technical requirements, scheduling, etc., are to be negotiated separately between the sponsor and the winning team and are subject to the implementation details finally published by the sponsor.</p>
</blockquote>

<h3 id="83special-awards">8.3　Special Awards</h3>

<p>Depending on competition resources and the entries, the following special awards are established (may be left vacant):</p>

<ul>
  <li>Best Engineering Implementation Award</li>
  <li>Best Creative Design Award</li>
  <li>Best Communication Performance Award</li>
  <li>Best Space Education Award</li>
  <li>Best International Collaboration Award</li>
  <li>Best Youth Team Award</li>
  <li>Best Open-Source Contribution Award</li>
</ul>

<blockquote>
  <p>Special awards are nominated and selected by the Review Committee, in principle one team per award. In exceptionally outstanding cases, and with the unanimous agreement of the Review Committee, tied awards or honorable mentions may be added.</p>
</blockquote>

<hr />

<h2 id="9-timeline">9. Timeline</h2>

<table>
  <thead>
    <tr>
      <th style="text-align: left">Stage</th>
      <th style="text-align: left">Time</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td style="text-align: left"><strong>Registration</strong></td>
      <td style="text-align: left">From now until July 10, 2026</td>
    </tr>
    <tr>
      <td style="text-align: left"><strong>On-site check-in</strong></td>
      <td style="text-align: left">July 20, 2026</td>
    </tr>
    <tr>
      <td style="text-align: left"><strong>Opening ceremony</strong></td>
      <td style="text-align: left">Morning of July 21, 2026</td>
    </tr>
    <tr>
      <td style="text-align: left"><strong>Pre-competition training</strong></td>
      <td style="text-align: left">Afternoon of July 21, 2026</td>
    </tr>
    <tr>
      <td style="text-align: left"><strong>Competition</strong></td>
      <td style="text-align: left">Evening of July 21 – noon of July 24, 2026</td>
    </tr>
    <tr>
      <td style="text-align: left"><strong>Closing ceremony &amp; awards</strong></td>
      <td style="text-align: left">Afternoon of July 24, 2026</td>
    </tr>
  </tbody>
</table>

<blockquote>
  <p>The detailed schedule is subject to the on-site program book.</p>
</blockquote>

<hr />

<h2 id="10-registration">10. Registration</h2>

<p>From now until <strong>July 10, 2026</strong>, visit the link below or scan the QR code to complete the registration form:</p>

<p>🔗 <a href="https://e7qw4eih9eej56g3.mikecrm.com/5PTDbpv">https://e7qw4eih9eej56g3.mikecrm.com/5PTDbpv</a></p>

<p><img width="309" height="309" alt="Registration QR code" src="https://github.com/user-attachments/assets/8a894c0f-126a-4965-8090-f853cb91922e" /></p>

<blockquote>
  <p>There is <strong>no registration fee</strong>. Travel, meals, and accommodation are at participants’ own expense. A photocopy of a valid personal accident-insurance policy must be submitted at check-in.</p>
</blockquote>

<hr />

<h2 id="11-contact">11. Contact</h2>

<table>
  <thead>
    <tr>
      <th style="text-align: left">Purpose</th>
      <th style="text-align: left">Contact</th>
      <th style="text-align: left">Phone</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td style="text-align: left">Technical inquiries</td>
      <td style="text-align: left">Mr./Ms. Zhang</td>
      <td style="text-align: left">14747715648</td>
    </tr>
    <tr>
      <td style="text-align: left">Event support</td>
      <td style="text-align: left">Mr./Ms. Yao</td>
      <td style="text-align: left">13936690218</td>
    </tr>
  </tbody>
</table>

<p>📧 <strong>Email:</strong> lilacsat@hit.edu.cn</p>

<hr />

<h2 id="12-other-notes">12. Other Notes</h2>

<p>This is the <strong>first-round announcement</strong>. The specific track rules, registration requirements, scoring criteria, equipment lists, schedule, award arrangements, and safety requirements are subject to the official competition notices and technical documents released later by the Organizing Committee.</p>

<p>For the latest updates, please follow the official notices of the WeChat public accounts <strong>“HIT Undergraduate Teaching” (哈工大本科教学), “BUPT School of Information and Communication Engineering” (北邮信息与通信工程学院), “LilacSat” (紫丁香卫星)</strong>, 🔗 <a href="https://lilacsat.github.io/">https://lilacsat.github.io/</a>, and others.</p>

<hr />

<p align="right"><strong>Organizing Committee, 2026 International Space Communication Challenge</strong></p>
<p align="right">June 29, 2026</p>]]></content><author><name>Your Name</name></author><summary type="html"><![CDATA[🛰️ 2026 International Space Communication Challenge Space Communication Track of the 2026 International Aeronautics and Astronautics Challenge — Invitation to Participate (First Announcement) Chinese name: 2026 国际空间通信挑战赛（2026 国际空天挑战赛空间通信赛道） The 2026 International Space Communication Challenge (Space Communication Track of the 2026 International Aeronautics and Astronautics Challenge) is an international aerospace-communication science and technology competition jointly hosted by the Harbin Institute of Technology (HIT) and the Beijing University of Posts and Telecommunications (BUPT). The competition is open to university and secondary-school students, amateur radio enthusiasts, and professionals in space communication worldwide. The relevant details are announced below. 1. Competition Name Item Name Chinese 2026 国际空间通信挑战赛（2026 国际空天挑战赛空间通信赛道） English 2026 International Space Communication Challenge 2. Mission and Purpose The competition focuses on frontier directions including satellite communication, deep-space exploration, space-based networks, space tracking, telemetry &amp; command (TT&amp;C), and amateur satellite applications. It aims to build an innovation and practice platform for university and secondary-school students and space-communication enthusiasts worldwide. The competition encourages teams to deeply integrate theory with engineering practice through hardware development, scheme design, live-contact testing, and data analysis — comprehensively strengthening skills in system design, innovative application, and international collaboration, and cultivating versatile talent with an international outlook and engineering competence. 3. Organizing Bodies Host Institutions Harbin Institute of Technology; Beijing University of Posts and Telecommunications Advisory Institutions Asia-Pacific Space Cooperation Organization (APSCO); Shanghai Institute of Satellite Engineering; Amateur Radio Branch of the Chinese Radio Association; Technical Committee on Fault-Tolerant Computing of the China Computer Federation (CCF) Co-organizers Student Amateur Radio Association of the University of Science and Technology of China; Youth Science &amp; Technology Museum of Dongcheng District, Beijing; Shanghai ASES Space Technology Co., Ltd.; Foshan South China Radio Club; Heilongjiang Radio Sports Association Supporting &amp; Sponsoring Institutions CAS Space Technology Co., Ltd.; Beijing Aerospace Yuxing Technology Co., Ltd.; ZhongkeTiansuan (Shanghai) Information Technology Co., Ltd. 4. Eligibility The competition is open to university and secondary-school students and space-communication enthusiasts worldwide. Participants include, but are not limited to: Undergraduate and graduate students at universities in China and abroad; Secondary-school students, vocational-school students, and youth science-and-technology innovation teams; University student science clubs, amateur radio associations, and aerospace innovation teams; Amateur radio operators, satellite-communication enthusiasts, and space-science education teams; Joint teams formed across schools, regions, and countries. 5. Schedule and Venue The competition is organized as a combination of on-site concentrated activities and global remote participation. Dates: July 20 – 24, 2026 Main on-site venue: Harbin Institute of Technology, Nangang District, Harbin Globally open track: Satellite Enigma Race may be conducted from anywhere in the world The exact schedule and reporting location are subject to the official notice issued later by the Organizing Committee. 6. Competition Tracks The competition comprises six tracks. Details and requirements for each are as follows. 6.1　SpaceCom Maker (匠造空间通信) Aimed at physical works related to space communication, this track encourages teams to develop hardware and demonstrate systems in directions such as satellite communication, ground stations, radio reception, antenna systems, communication payloads, signal processing, and demonstration apparatus. Teams submit physical works and present, demonstrate, and technically explain them on-site in Harbin. Scoring: Scored on-site by all participating team members present in Harbin (excluding members of the team being scored); ranked by total score. 6.2　Amateur Satellite Concept (业余卫星创想) Teams are encouraged to propose innovative amateur-satellite design schemes based on a 6U CubeSat, with emphasis on mission concept, system design, communication scheme, engineering feasibility, and application value. Teams submit design schemes and give a presentation and defense on-site in Harbin. Scoring: Scored on-site by all participating team members present in Harbin (excluding members of the team being scored); ranked by total score. 6.3　Radio Wave Duel (电波对决争锋) This track simulates a satellite-communication scenario under shared spectrum, limited resources, and complex electromagnetic interference, emphasizing teams’ comprehensive abilities in communication-system design, protocol optimization, link maintenance, anti-jamming transmission, and effective data exchange. Each team must use the equipment uniformly provided by the Organizing Committee to independently design and build a communication system: within the designated frequency band, one SDR device transmits and another SDR device receives, with the transmitted/received content being random data files provided by the Committee. All teams operate simultaneously in the same venue; every team’s transmitted signal constitutes active interference to the others, so each team must account for and resist various forms of interference from other teams in its system design. Computers used in the competition must have all communication interfaces other than the SDR disabled, ensuring a fair and controllable environment. Scoring: The judging panel ranks teams by the amount of random data correctly demodulated; the team demodulating the most valid data wins. 6.4　Weather Satellite Reception (天线追风捕云) This track simulates the rapid-deployment task of a real meteorological-satellite ground receiving station. Within the time limit, teams must complete feed fabrication, receiving-system assembly, and tuning, successfully capture the downlink signals of geostationary meteorological satellites, and demodulate/recover valid cloud imagery (including but not limited to FY-2G/H, GK-2A, etc.). The organizers uniformly provide the antenna, mounts, filters, amplifiers, RF cables, receiver, decoding software, and necessary tools; teams may replace any component except the antenna reflector. Scoring: Comprehensive scoring based on system-assembly quality, number of valid image frames, image completeness, and number of satellites received (different bands or modes of the same satellite count as different satellites). 6.5　Deep-Space Tracking (深空追迹定轨) This track simulates the measurement task of a deep-space exploration ground station. Within the time limit, teams must complete receiving-system assembly and tuning, and perform signal reception, Doppler-shift measurement, and orbit determination for targets such as Tiandu-1. The organizers uniformly provide the antenna, mounts, filters, amplifiers, RF cables, receiver, and necessary tools; teams may replace any component except the antenna reflector. If uncontrollable factors such as weather affect on-site observation, the organizers will uniformly provide backup measurement data for subsequent processing. Scoring: Comprehensive scoring based on system-assembly quality, measurement-data quality, and orbit-determination accuracy. 6.6　Satellite Enigma Race (逐星解谜竞速) This globally open amateur satellite-contact activity encourages teams to receive satellite telemetry signals faster and better. Within the designated competition window, teams or individuals earn points by receiving special telemetry signals from the ASRTU-1 “Friendship” satellite and performing decoding and puzzle-solving operations. Matters not covered for each track (detailed rules, equipment requirements, scoring criteria, etc.) are subject to technical documents released later by the Organizing Committee. Throughout the competition, teams must retain raw measurement data and processing code for review by the judging panel. 7. Rules of Participation 7.1　Team Formation Participants may compete individually or as teams. Joint teams across schools, regions, and countries are encouraged, with no restriction on members’ affiliations. No individual may register for the same track under more than one team. After registration closes, team membership may in principle not be changed; in genuinely exceptional cases, a written request must be submitted to the Organizing Committee and approved before any adjustment. A single team (including an individual) may register for one or more tracks according to their strengths, and each track’s results are calculated independently. Team-size limits per track: Track Team Size SpaceCom Maker 1 – 6 Amateur Satellite Concept 1 – 6 Radio Wave Duel 2 – 6 Weather Satellite Reception 1 – 6 Deep-Space Tracking 1 – 6 Satellite Enigma Race 1 – 6 7.2　Fairness All teams must abide by the competition rules and must not falsify data, misappropriate others’ work, maliciously interfere with other teams, use external data in violation of the rules, or exceed power limits. 7.3　Safety When radio transmission, antenna erection, outdoor equipment installation, power systems, and RF equipment are involved, teams must comply with safety regulations. 7.4　Intellectual Property Intellectual property of entries in principle belongs to the participating teams. Teams must ensure that their works, schemes, software, images, data, and reports do not infringe upon any rights. 7.5　Delegations For this edition, the “delegation” is the unit for selecting the Overall Champion, Runner-up, and Second Runner-up. A delegation may consist of multiple teams from the same school, the same institution, or a joint entry, each registering for the various tracks separately. Members of different teams within the same delegation may be shared across teams, but no individual may join more than one delegation. Each delegation must designate a contact person responsible for communication and coordination with the Organizing Committee on all track matters within the delegation. Teams are identified by the team name entered at registration; the delegation is used only for overall-ranking calculation. 8. Awards 8.1　Track Awards For each track, First, Second, Third, and Merit prizes are established according to the number of participating teams and their results, with certificates issued. The top three in each track receive Champion / Runner-up / Second Runner-up certificates, along with trophies, aerospace models, cultural-creative products, and other rewards. Outstanding teams may receive corporate internship recommendations, media promotion, and opportunities for follow-on project collaboration. 8.2　Overall Awards The competition awards an Overall Champion, Runner-up, and Second Runner-up, determined by the comprehensive performance of each delegation across the tracks it entered. A delegation may consist of one or more teams; teams are identified by their registered names, and the delegation is used only for overall ranking. Scoring Rule Each track assigns points by team ranking: 1st place scores 100 and last place scores 10, with intermediate places distributed linearly and evenly between 100 and 10 in rank order. For a total of N participating teams: Score of rank r = 100 − (r − 1) × (100 − 10) / (N − 1) (Results are rounded to the nearest integer; if only one team competes, it scores 100.) Each track’s score is credited to the delegation to which the team belongs. If a delegation has multiple teams in the same track, only the highest score in that track counts toward the delegation’s total — scores are not accumulated. Each delegation’s total is the sum of its four best track scores, and these must include at least one of “SpaceCom Maker” and “Amateur Satellite Concept.” Delegations are ranked from highest to lowest total and awarded Overall Champion, Runner-up, and Second Runner-up accordingly. Tie-breaking order: ① the delegation entering more tracks ranks higher; ② the higher top score in a common track ranks higher; ③ if still tied, the Arbitration Committee decides based on the technical difficulty, innovation, or completeness of the entered projects. If a delegation enters fewer than four tracks, its total is computed from the tracks actually entered and it may still be ranked. Rewards for the Overall Top Three (first-choose-first-served; each reward limited to one team; no duplication) Priority Reward Sponsor 1 Free satellite launch (Kinetica-1, 7 kg, or Kinetica-2, 15 kg) CAS Space 2 Free antenna time (LEO satellite TT&amp;C, 365 passes) Aerospace Yuxing 3 Free in-orbit hosting (1 kg satellite payload to orbit) ZhongkeTiansuan The Overall Champion, Runner-up, and Second Runner-up choose in ranking order. Specific fulfillment conditions, payload technical requirements, scheduling, etc., are to be negotiated separately between the sponsor and the winning team and are subject to the implementation details finally published by the sponsor. 8.3　Special Awards Depending on competition resources and the entries, the following special awards are established (may be left vacant): Best Engineering Implementation Award Best Creative Design Award Best Communication Performance Award Best Space Education Award Best International Collaboration Award Best Youth Team Award Best Open-Source Contribution Award Special awards are nominated and selected by the Review Committee, in principle one team per award. In exceptionally outstanding cases, and with the unanimous agreement of the Review Committee, tied awards or honorable mentions may be added. 9. Timeline Stage Time Registration From now until July 10, 2026 On-site check-in July 20, 2026 Opening ceremony Morning of July 21, 2026 Pre-competition training Afternoon of July 21, 2026 Competition Evening of July 21 – noon of July 24, 2026 Closing ceremony &amp; awards Afternoon of July 24, 2026 The detailed schedule is subject to the on-site program book. 10. Registration From now until July 10, 2026, visit the link below or scan the QR code to complete the registration form: 🔗 https://e7qw4eih9eej56g3.mikecrm.com/5PTDbpv There is no registration fee. Travel, meals, and accommodation are at participants’ own expense. A photocopy of a valid personal accident-insurance policy must be submitted at check-in. 11. Contact Purpose Contact Phone Technical inquiries Mr./Ms. Zhang 14747715648 Event support Mr./Ms. Yao 13936690218 📧 Email: lilacsat@hit.edu.cn 12. Other Notes This is the first-round announcement. The specific track rules, registration requirements, scoring criteria, equipment lists, schedule, award arrangements, and safety requirements are subject to the official competition notices and technical documents released later by the Organizing Committee. For the latest updates, please follow the official notices of the WeChat public accounts “HIT Undergraduate Teaching” (哈工大本科教学), “BUPT School of Information and Communication Engineering” (北邮信息与通信工程学院), “LilacSat” (紫丁香卫星), 🔗 https://lilacsat.github.io/, and others. Organizing Committee, 2026 International Space Communication Challenge June 29, 2026]]></summary></entry><entry><title type="html">2026国际空间通信挑战赛（2026国际空天挑战赛空间通信赛道）参赛邀请函（第一轮公告）</title><link href="https://lilacsat.github.io/2026/06/30/2026%E5%9B%BD%E9%99%85%E7%A9%BA%E9%97%B4%E9%80%9A%E4%BF%A1%E6%8C%91%E6%88%98%E8%B5%9B%E5%8F%82%E8%B5%9B%E9%82%80%E8%AF%B7%E5%87%BD-%E7%AC%AC%E4%B8%80%E8%BD%AE%E5%85%AC%E5%91%8A.html" rel="alternate" type="text/html" title="2026国际空间通信挑战赛（2026国际空天挑战赛空间通信赛道）参赛邀请函（第一轮公告）" /><published>2026-06-30T00:00:00+08:00</published><updated>2026-06-30T00:00:00+08:00</updated><id>https://lilacsat.github.io/2026/06/30/2026%E5%9B%BD%E9%99%85%E7%A9%BA%E9%97%B4%E9%80%9A%E4%BF%A1%E6%8C%91%E6%88%98%E8%B5%9B%E5%8F%82%E8%B5%9B%E9%82%80%E8%AF%B7%E5%87%BD%EF%BC%88%E7%AC%AC%E4%B8%80%E8%BD%AE%E5%85%AC%E5%91%8A%EF%BC%89</id><content type="html" xml:base="https://lilacsat.github.io/2026/06/30/2026%E5%9B%BD%E9%99%85%E7%A9%BA%E9%97%B4%E9%80%9A%E4%BF%A1%E6%8C%91%E6%88%98%E8%B5%9B%E5%8F%82%E8%B5%9B%E9%82%80%E8%AF%B7%E5%87%BD-%E7%AC%AC%E4%B8%80%E8%BD%AE%E5%85%AC%E5%91%8A.html"><![CDATA[<h1 id="️-2026-国际空间通信挑战赛">🛰️ 2026 国际空间通信挑战赛</h1>

<h3 id="2026-国际空天挑战赛--空间通信赛道--参赛邀请函第一轮公告">2026 国际空天挑战赛 · 空间通信赛道 — 参赛邀请函（第一轮公告）</h3>

<blockquote>
  <p><strong>英文名称：</strong> 2026 International Space Communication Challenge</p>
</blockquote>

<p>2026 国际空间通信挑战赛（2026 国际空天挑战赛空间通信赛道）是由<strong>哈尔滨工业大学、北京邮电大学</strong>联合主办的国际性航天通信科技竞赛。赛事面向全球大中学生、业余无线电爱好者及空间通信相关领域人士，现就有关事项公告如下：</p>

<hr />

<h2 id="一赛事名称">一、赛事名称</h2>

<table>
  <thead>
    <tr>
      <th style="text-align: left">项目</th>
      <th style="text-align: left">名称</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td style="text-align: left"><strong>中文名称</strong></td>
      <td style="text-align: left">2026 国际空间通信挑战赛（2026 国际空天挑战赛空间通信赛道）</td>
    </tr>
    <tr>
      <td style="text-align: left"><strong>英文名称</strong></td>
      <td style="text-align: left">2026 International Space Communication Challenge</td>
    </tr>
  </tbody>
</table>

<hr />

<h2 id="二赛事宗旨">二、赛事宗旨</h2>

<p>本赛事聚焦<strong>卫星通信、深空探测、天基网络、空间测控及业余卫星应用</strong>等前沿方向，旨在为全球大中学生及空间通信爱好者搭建创新实践平台。</p>

<p>赛事鼓励参赛团队通过实物研制、方案设计、通联实测与数据分析等形式，将理论知识与工程实践深度融合，全面提升系统设计、创新应用与国际协作能力，培养具备国际视野和工程素养的复合型人才。</p>

<hr />

<h2 id="三组织单位">三、组织单位</h2>

<p><strong>主办单位</strong>
哈尔滨工业大学、北京邮电大学</p>

<p><strong>指导单位</strong>
亚太空间合作组织、上海卫星工程研究所、中国无线电协会业余无线电分会、中国计算机学会容错计算专委会</p>

<p><strong>协办单位</strong>
中国科学技术大学学生业余无线电协会、北京市东城区青少年科技馆、上海埃依斯航天科技有限公司、佛山市华南无线电俱乐部、黑龙江省无线电运动协会</p>

<p><strong>支持及赞助单位</strong>
中科宇航技术股份有限公司、北京航天驭星科技有限公司、中科天算（上海）信息科技有限公司</p>

<hr />

<h2 id="四参赛对象">四、参赛对象</h2>

<p>赛事面向全球范围内的大中学生及空间通信爱好者开放。参赛对象包括但不限于：</p>

<ul>
  <li>国内外普通高校本科生、研究生；</li>
  <li>中学生、中职学生及青少年科技创新团队；</li>
  <li>高校学生科技社团、无线电协会、航天科技创新团队；</li>
  <li>业余无线电爱好者、卫星通信爱好者和空间科学教育实践团队；</li>
  <li>跨学校、跨地区、跨国家联合组队的参赛团队。</li>
</ul>

<hr />

<h2 id="五赛事时间与地点">五、赛事时间与地点</h2>

<p>赛事采取<strong>线下集中活动、全球远程参与相结合</strong>的方式组织。</p>

<ul>
  <li><strong>举办时间：</strong> 2026 年 7 月 20 日 – 24 日</li>
  <li><strong>线下主会场：</strong> 哈尔滨市南岗区 · 哈尔滨工业大学</li>
  <li><strong>全球开放赛项：</strong>「逐星解谜竞速」可在全球范围内开展参赛活动</li>
</ul>

<blockquote>
  <p>具体时间安排及报到地点以组委会后续发布的正式通知为准。</p>
</blockquote>

<hr />

<h2 id="六赛项设置">六、赛项设置</h2>

<p>本届赛事共设<strong>六个赛项</strong>，各赛项具体内容及要求如下：</p>

<h3 id="一匠造空间通信">（一）匠造空间通信</h3>

<p>面向空间通信相关实物作品，鼓励参赛团队围绕<strong>卫星通信、地面站、无线电接收、天线系统、通信载荷、信号处理、演示装置</strong>等方向开展实物研制和系统展示。参赛队伍提交实物作品并在哈尔滨现场进行展示、演示和技术说明。</p>

<p><strong>评分方式：</strong> 由哈尔滨竞赛现场全体参赛队员（本代表团队员除外）现场打分，按总分排名。</p>

<h3 id="二业余卫星创想">（二）业余卫星创想</h3>

<p>鼓励参赛团队围绕 <strong>6U 立方星</strong>提出创新性业余卫星设计方案，重点考察任务构想、系统设计、通信方案、工程可行性和应用价值。参赛队伍提交设计方案并在哈尔滨现场进行方案陈述和答辩。</p>

<p><strong>评分方式：</strong> 由哈尔滨竞赛现场全体参赛队员（本代表团队员除外）现场打分，按总分排名。</p>

<h3 id="三电波对决争锋">（三）电波对决争锋</h3>

<p>本赛项模拟<strong>共享频谱、有限资源及复杂电磁干扰</strong>条件下的卫星通信场景，重点考察参赛队伍在通信系统设计、协议优化、链路维护、抗干扰传输与有效数据交互等方面的综合能力。</p>

<p>各参赛队须利用组委会统一提供的设备，自主设计并搭建一套通信系统，在规定频段内使用一台 SDR 设备发射、另一台 SDR 设备接收，收发内容为组委会提供的随机数据文件。各队同时同场进行收发作业，每支队伍的发射信号均构成对其他队伍的有源干扰，各队须在系统设计中充分考虑并抵御他队可能施加的各类干扰。参赛所用电脑须关闭 SDR 以外的所有通信接口，确保竞赛环境公平可控。</p>

<p><strong>评分方式：</strong> 裁判组根据各队正确解调的随机数据量进行排名，成功解调有效数据量高者优胜。</p>

<h3 id="四天线追风捕云">（四）天线追风捕云</h3>

<p>本赛项模拟真实气象卫星地面接收站的<strong>快速部署任务</strong>，要求参赛队伍在规定时间内完成馈源制作、接收系统搭建及调试，成功捕获静止轨道气象卫星的下行信号，并解调恢复出有效云图（包括但不限于 <strong>FY-2G/H、GK2A</strong> 等）。</p>

<p>组织方统一提供天线、支架、滤波器、放大器、高频电缆、接收机、解码软件及必要工具，参赛队伍可更换除天线反射面以外的任意部件。</p>

<p><strong>评分方式：</strong> 按系统搭建情况、有效图像帧数、图像完整性、接收卫星数量（同一颗卫星的不同频段、不同模式按不同卫星计）综合计分。</p>

<h3 id="五深空追迹定轨">（五）深空追迹定轨</h3>

<p>本赛项模拟<strong>深空探测地面站的测量任务</strong>，要求参赛队伍在规定时间内完成接收系统搭建及调试，对<strong>天都一号</strong>等目标开展信号接收、多普勒频移测量与轨道确定。</p>

<p>组织方统一提供天线、支架、滤波器、放大器、高频电缆、接收机及必要工具，参赛队伍可更换除天线反射面以外的任意部件。如遇天气等不可控因素影响现场观测，组织方将统一提供备用测量数据用于后续处理。</p>

<p><strong>评分方式：</strong> 按系统搭建情况、测量数据质量、定轨结果准确度综合计分。</p>

<h3 id="六逐星解谜竞速">（六）逐星解谜竞速</h3>

<p>本赛项是面向全球的<strong>业余卫星通联活动</strong>，鼓励参赛队伍更快更好地接收卫星遥测信号。参赛队伍或个人在规定比赛时间内，通过接收<strong>阿斯图友谊号卫星</strong>特殊遥测信号并进行解码解谜操作获得积分。</p>

<blockquote>
  <p>各赛项未尽事宜（详细规则、设备要求、评分细则等）以组委会后续发布的技术文件为准。竞赛过程中，各参赛队伍须保留原始测量数据及处理代码，供裁判组复核备查。</p>
</blockquote>

<hr />

<h2 id="七参赛规则">七、参赛规则</h2>

<h3 id="一组队规则">（一）组队规则</h3>

<p>参赛者可为个人或团队，鼓励跨学校、跨地区、跨国家联合组队，团队成员所在单位不限。同一人员不得在同一赛项中以不同队伍身份重复报名。报名截止后，参赛队伍成员原则上不得变更；如确有特殊情况，须向组委会提交书面申请，经批准后方可调整。</p>

<p>同一参赛队伍（含个人）可根据自身专长报名参加一个或多个赛项，各赛项成绩独立计算。各赛项允许人数如下：</p>

<table>
  <thead>
    <tr>
      <th style="text-align: left">赛项</th>
      <th style="text-align: center">允许人数</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td style="text-align: left">匠造空间通信</td>
      <td style="text-align: center">1 – 6 人</td>
    </tr>
    <tr>
      <td style="text-align: left">业余卫星创想</td>
      <td style="text-align: center">1 – 6 人</td>
    </tr>
    <tr>
      <td style="text-align: left">电波对决争锋</td>
      <td style="text-align: center">2 – 6 人</td>
    </tr>
    <tr>
      <td style="text-align: left">天线追风捕云</td>
      <td style="text-align: center">1 – 6 人</td>
    </tr>
    <tr>
      <td style="text-align: left">深空追迹定轨</td>
      <td style="text-align: center">1 – 6 人</td>
    </tr>
    <tr>
      <td style="text-align: left">逐星解谜竞速</td>
      <td style="text-align: center">1 – 6 人</td>
    </tr>
  </tbody>
</table>

<h3 id="二公平性要求">（二）公平性要求</h3>

<p>所有参赛队伍应遵守赛事规则，不得伪造数据、冒用他人成果、恶意干扰其他队伍、违规使用外部数据或超出功率限制。</p>

<h3 id="三安全要求">（三）安全要求</h3>

<p>涉及无线电发射、天线架设、室外设备安装、供电系统、射频设备使用等环节时，参赛队伍应遵守安全规范。</p>

<h3 id="四知识产权">（四）知识产权</h3>

<p>参赛作品知识产权原则上归参赛团队所有。参赛团队应保证作品、方案、软件、图片、数据和报告不存在侵权行为。</p>

<h3 id="五代表团说明">（五）代表团说明</h3>

<p>本届赛事以<strong>「代表团」</strong>作为总冠军、总亚军、总季军评选的主体单位。一个代表团可由同一学校、同一单位或联合组队的多支参赛队伍组成，各队伍分别报名参加各赛项。同一代表团的不同参赛队伍人员可跨队复用，但同一人员不得加入不同代表团。代表团须指定一名联系人，负责与组委会沟通及协调团内各赛项事宜。参赛队伍以报名时填写的队伍名称为准，代表团仅用于总成绩排名核算。</p>

<hr />

<h2 id="八奖项设置">八、奖项设置</h2>

<h3 id="一赛项奖">（一）赛项奖</h3>

<p>每个赛项按参赛队伍数量和比赛成绩，分别设立<strong>一等奖、二等奖、三等奖及优秀奖</strong>，并颁发证书。各赛项评选前三名，颁发冠、亚、季军证书，并提供奖杯、航天模型、文创产品等奖励。优秀团队可获企业实习推荐、媒体宣传及后续项目合作机会。</p>

<h3 id="二综合奖">（二）综合奖</h3>

<p>赛事设<strong>总冠军、总亚军、总季军</strong>，依据各参赛代表团在所参加赛项中的综合表现确定。参赛代表团可由一支或多支参赛队伍组成，参赛队伍以报名时填写的名称为准，代表团仅用于总成绩排名。</p>

<p><strong>计分规则</strong></p>

<p>各赛项按参赛队伍排名赋分：第一名 100 分，最后一名 10 分，中间名次按名次顺序在 100 分至 10 分之间线性均匀分布。参赛队伍总数为 <em>N</em>，则：</p>

<div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>第 r 名得分 = 100 − (r − 1) × (100 − 10) / (N − 1)
</code></pre></div></div>

<p>（结果四舍五入取整数；仅有 1 支队伍参赛时计 100 分。）</p>

<p>各赛项得分计入该队伍所属代表团总成绩。如同一代表团有多支队伍参与同一赛项，该赛项仅取其中最高得分计入代表团总成绩，不重复累加。</p>

<p>每支代表团取成绩最优的<strong>四个赛项</strong>得分之和作为总成绩排名依据，且其中须<strong>至少包含「匠造空间通信」「业余卫星创想」两项中的一项</strong>。按总成绩从高到低排序，依次授予总冠军、总亚军、总季军。</p>

<p><strong>同分处理顺序：</strong> ① 参赛赛项数量多者优先；② 相同赛项中最高得分高者优先；③ 如仍相同，由仲裁委员会以参赛项目的技术难度、创新性或完成度为依据进行裁定。</p>

<p>代表团如参加赛项不足四项，则按实际参赛赛项计算总积分，仍可参与总成绩排名。</p>

<p><strong>总冠亚季军奖励（先选先得，每项仅限一支队伍，不可重复）</strong></p>

<table>
  <thead>
    <tr>
      <th style="text-align: center">优先次序</th>
      <th style="text-align: left">奖励内容</th>
      <th style="text-align: left">赞助单位</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td style="text-align: center">1</td>
      <td style="text-align: left">免费卫星发射（力箭一号 7 kg 或力箭二号 15 kg）</td>
      <td style="text-align: left">中科宇航</td>
    </tr>
    <tr>
      <td style="text-align: center">2</td>
      <td style="text-align: left">免费天线机时（低轨卫星测控 365 圈）</td>
      <td style="text-align: left">航天驭星</td>
    </tr>
    <tr>
      <td style="text-align: center">3</td>
      <td style="text-align: left">免费在轨搭载（1 kg 卫星有效载荷上星）</td>
      <td style="text-align: left">中科天算</td>
    </tr>
  </tbody>
</table>

<blockquote>
  <p>总冠军、总亚军、总季军按排名先后依次优先选择。具体兑现条件、搭载技术要求、时间安排等，由赞助单位与获奖队伍另行协商确定，以赞助单位最终公布的实施细则为准。</p>
</blockquote>

<h3 id="三专项奖">（三）专项奖</h3>

<p>根据赛事资源和参赛作品情况，设立以下专项奖（可空缺）：</p>

<ul>
  <li>最佳工程实现奖</li>
  <li>最佳创意设计奖</li>
  <li>最佳通信性能奖</li>
  <li>最佳空间教育奖</li>
  <li>最佳国际协作奖</li>
  <li>最佳青少年团队奖</li>
  <li>最佳开源贡献奖</li>
</ul>

<blockquote>
  <p>专项奖由评审委员会提名并评选，每项原则上授予 1 支队伍。如有特别优秀者，经评审委员会一致同意，可增设并列获奖或荣誉提名。</p>
</blockquote>

<hr />

<h2 id="九赛事流程">九、赛事流程</h2>

<table>
  <thead>
    <tr>
      <th style="text-align: left">阶段</th>
      <th style="text-align: left">时间</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td style="text-align: left"><strong>报名阶段</strong></td>
      <td style="text-align: left">即日起至 2026 年 7 月 10 日</td>
    </tr>
    <tr>
      <td style="text-align: left"><strong>现场报到</strong></td>
      <td style="text-align: left">2026 年 7 月 20 日</td>
    </tr>
    <tr>
      <td style="text-align: left"><strong>开幕式</strong></td>
      <td style="text-align: left">2026 年 7 月 21 日 上午</td>
    </tr>
    <tr>
      <td style="text-align: left"><strong>赛前培训</strong></td>
      <td style="text-align: left">2026 年 7 月 21 日 下午</td>
    </tr>
    <tr>
      <td style="text-align: left"><strong>正式比赛</strong></td>
      <td style="text-align: left">2026 年 7 月 21 日 晚 – 24 日 中午</td>
    </tr>
    <tr>
      <td style="text-align: left"><strong>闭幕式与颁奖</strong></td>
      <td style="text-align: left">2026 年 7 月 24 日 下午</td>
    </tr>
  </tbody>
</table>

<blockquote>
  <p>具体日程以现场秩序册为准。</p>
</blockquote>

<hr />

<h2 id="十报名方式">十、报名方式</h2>

<p>即日起至 <strong>2026 年 7 月 10 日</strong>，访问以下链接或扫码填写报名表：</p>

<p>🔗 <a href="https://e7qw4eih9eej56g3.mikecrm.com/5PTDbpv">https://e7qw4eih9eej56g3.mikecrm.com/5PTDbpv</a></p>

<p><img width="309" height="309" alt="报名二维码" src="https://github.com/user-attachments/assets/8a894c0f-126a-4965-8090-f853cb91922e" /></p>

<blockquote>
  <p>参赛<strong>不收取报名费</strong>，交通及食宿自理，报到时须提交有效人身意外伤害保险单复印件。</p>
</blockquote>

<hr />

<h2 id="十一联系方式">十一、联系方式</h2>

<table>
  <thead>
    <tr>
      <th style="text-align: left">事项</th>
      <th style="text-align: left">联系人</th>
      <th style="text-align: left">电话</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td style="text-align: left">技术咨询</td>
      <td style="text-align: left">张老师</td>
      <td style="text-align: left">14747715648</td>
    </tr>
    <tr>
      <td style="text-align: left">赛事保障</td>
      <td style="text-align: left">姚老师</td>
      <td style="text-align: left">13936690218</td>
    </tr>
  </tbody>
</table>

<p>📧 <strong>联系邮箱：</strong> lilacsat@hit.edu.cn</p>

<hr />

<h2 id="十二其他事项">十二、其他事项</h2>

<p>本通知为<strong>第一轮通知</strong>，具体赛项规则、报名要求、评分细则、设备清单、时间安排、奖励办法和安全要求，以组委会后续发布的正式竞赛通知和技术文件为准。</p>

<p>赛事最新动态请持续关注 <strong>「哈工大本科教学」「北邮信息与通信工程学院」「紫丁香卫星」</strong> 等公众号及🔗 <a href="https://lilacsat.github.io/">https://lilacsat.github.io/</a>官方通知。</p>

<hr />

<p align="right"><strong>2026 国际空间通信挑战赛组织委员会</strong></p>
<p align="right">2026 年 6 月 29 日</p>]]></content><author><name>Your Name</name></author><summary type="html"><![CDATA[🛰️ 2026 国际空间通信挑战赛 2026 国际空天挑战赛 · 空间通信赛道 — 参赛邀请函（第一轮公告） 英文名称： 2026 International Space Communication Challenge 2026 国际空间通信挑战赛（2026 国际空天挑战赛空间通信赛道）是由哈尔滨工业大学、北京邮电大学联合主办的国际性航天通信科技竞赛。赛事面向全球大中学生、业余无线电爱好者及空间通信相关领域人士，现就有关事项公告如下： 一、赛事名称 项目 名称 中文名称 2026 国际空间通信挑战赛（2026 国际空天挑战赛空间通信赛道） 英文名称 2026 International Space Communication Challenge 二、赛事宗旨 本赛事聚焦卫星通信、深空探测、天基网络、空间测控及业余卫星应用等前沿方向，旨在为全球大中学生及空间通信爱好者搭建创新实践平台。 赛事鼓励参赛团队通过实物研制、方案设计、通联实测与数据分析等形式，将理论知识与工程实践深度融合，全面提升系统设计、创新应用与国际协作能力，培养具备国际视野和工程素养的复合型人才。 三、组织单位 主办单位 哈尔滨工业大学、北京邮电大学 指导单位 亚太空间合作组织、上海卫星工程研究所、中国无线电协会业余无线电分会、中国计算机学会容错计算专委会 协办单位 中国科学技术大学学生业余无线电协会、北京市东城区青少年科技馆、上海埃依斯航天科技有限公司、佛山市华南无线电俱乐部、黑龙江省无线电运动协会 支持及赞助单位 中科宇航技术股份有限公司、北京航天驭星科技有限公司、中科天算（上海）信息科技有限公司 四、参赛对象 赛事面向全球范围内的大中学生及空间通信爱好者开放。参赛对象包括但不限于： 国内外普通高校本科生、研究生； 中学生、中职学生及青少年科技创新团队； 高校学生科技社团、无线电协会、航天科技创新团队； 业余无线电爱好者、卫星通信爱好者和空间科学教育实践团队； 跨学校、跨地区、跨国家联合组队的参赛团队。 五、赛事时间与地点 赛事采取线下集中活动、全球远程参与相结合的方式组织。 举办时间： 2026 年 7 月 20 日 – 24 日 线下主会场： 哈尔滨市南岗区 · 哈尔滨工业大学 全球开放赛项：「逐星解谜竞速」可在全球范围内开展参赛活动 具体时间安排及报到地点以组委会后续发布的正式通知为准。 六、赛项设置 本届赛事共设六个赛项，各赛项具体内容及要求如下： （一）匠造空间通信 面向空间通信相关实物作品，鼓励参赛团队围绕卫星通信、地面站、无线电接收、天线系统、通信载荷、信号处理、演示装置等方向开展实物研制和系统展示。参赛队伍提交实物作品并在哈尔滨现场进行展示、演示和技术说明。 评分方式： 由哈尔滨竞赛现场全体参赛队员（本代表团队员除外）现场打分，按总分排名。 （二）业余卫星创想 鼓励参赛团队围绕 6U 立方星提出创新性业余卫星设计方案，重点考察任务构想、系统设计、通信方案、工程可行性和应用价值。参赛队伍提交设计方案并在哈尔滨现场进行方案陈述和答辩。 评分方式： 由哈尔滨竞赛现场全体参赛队员（本代表团队员除外）现场打分，按总分排名。 （三）电波对决争锋 本赛项模拟共享频谱、有限资源及复杂电磁干扰条件下的卫星通信场景，重点考察参赛队伍在通信系统设计、协议优化、链路维护、抗干扰传输与有效数据交互等方面的综合能力。 各参赛队须利用组委会统一提供的设备，自主设计并搭建一套通信系统，在规定频段内使用一台 SDR 设备发射、另一台 SDR 设备接收，收发内容为组委会提供的随机数据文件。各队同时同场进行收发作业，每支队伍的发射信号均构成对其他队伍的有源干扰，各队须在系统设计中充分考虑并抵御他队可能施加的各类干扰。参赛所用电脑须关闭 SDR 以外的所有通信接口，确保竞赛环境公平可控。 评分方式： 裁判组根据各队正确解调的随机数据量进行排名，成功解调有效数据量高者优胜。 （四）天线追风捕云 本赛项模拟真实气象卫星地面接收站的快速部署任务，要求参赛队伍在规定时间内完成馈源制作、接收系统搭建及调试，成功捕获静止轨道气象卫星的下行信号，并解调恢复出有效云图（包括但不限于 FY-2G/H、GK2A 等）。 组织方统一提供天线、支架、滤波器、放大器、高频电缆、接收机、解码软件及必要工具，参赛队伍可更换除天线反射面以外的任意部件。 评分方式： 按系统搭建情况、有效图像帧数、图像完整性、接收卫星数量（同一颗卫星的不同频段、不同模式按不同卫星计）综合计分。 （五）深空追迹定轨 本赛项模拟深空探测地面站的测量任务，要求参赛队伍在规定时间内完成接收系统搭建及调试，对天都一号等目标开展信号接收、多普勒频移测量与轨道确定。 组织方统一提供天线、支架、滤波器、放大器、高频电缆、接收机及必要工具，参赛队伍可更换除天线反射面以外的任意部件。如遇天气等不可控因素影响现场观测，组织方将统一提供备用测量数据用于后续处理。 评分方式： 按系统搭建情况、测量数据质量、定轨结果准确度综合计分。 （六）逐星解谜竞速 本赛项是面向全球的业余卫星通联活动，鼓励参赛队伍更快更好地接收卫星遥测信号。参赛队伍或个人在规定比赛时间内，通过接收阿斯图友谊号卫星特殊遥测信号并进行解码解谜操作获得积分。 各赛项未尽事宜（详细规则、设备要求、评分细则等）以组委会后续发布的技术文件为准。竞赛过程中，各参赛队伍须保留原始测量数据及处理代码，供裁判组复核备查。 七、参赛规则 （一）组队规则 参赛者可为个人或团队，鼓励跨学校、跨地区、跨国家联合组队，团队成员所在单位不限。同一人员不得在同一赛项中以不同队伍身份重复报名。报名截止后，参赛队伍成员原则上不得变更；如确有特殊情况，须向组委会提交书面申请，经批准后方可调整。 同一参赛队伍（含个人）可根据自身专长报名参加一个或多个赛项，各赛项成绩独立计算。各赛项允许人数如下： 赛项 允许人数 匠造空间通信 1 – 6 人 业余卫星创想 1 – 6 人 电波对决争锋 2 – 6 人 天线追风捕云 1 – 6 人 深空追迹定轨 1 – 6 人 逐星解谜竞速 1 – 6 人 （二）公平性要求 所有参赛队伍应遵守赛事规则，不得伪造数据、冒用他人成果、恶意干扰其他队伍、违规使用外部数据或超出功率限制。 （三）安全要求 涉及无线电发射、天线架设、室外设备安装、供电系统、射频设备使用等环节时，参赛队伍应遵守安全规范。 （四）知识产权 参赛作品知识产权原则上归参赛团队所有。参赛团队应保证作品、方案、软件、图片、数据和报告不存在侵权行为。 （五）代表团说明 本届赛事以「代表团」作为总冠军、总亚军、总季军评选的主体单位。一个代表团可由同一学校、同一单位或联合组队的多支参赛队伍组成，各队伍分别报名参加各赛项。同一代表团的不同参赛队伍人员可跨队复用，但同一人员不得加入不同代表团。代表团须指定一名联系人，负责与组委会沟通及协调团内各赛项事宜。参赛队伍以报名时填写的队伍名称为准，代表团仅用于总成绩排名核算。 八、奖项设置 （一）赛项奖 每个赛项按参赛队伍数量和比赛成绩，分别设立一等奖、二等奖、三等奖及优秀奖，并颁发证书。各赛项评选前三名，颁发冠、亚、季军证书，并提供奖杯、航天模型、文创产品等奖励。优秀团队可获企业实习推荐、媒体宣传及后续项目合作机会。 （二）综合奖 赛事设总冠军、总亚军、总季军，依据各参赛代表团在所参加赛项中的综合表现确定。参赛代表团可由一支或多支参赛队伍组成，参赛队伍以报名时填写的名称为准，代表团仅用于总成绩排名。 计分规则 各赛项按参赛队伍排名赋分：第一名 100 分，最后一名 10 分，中间名次按名次顺序在 100 分至 10 分之间线性均匀分布。参赛队伍总数为 N，则： 第 r 名得分 = 100 − (r − 1) × (100 − 10) / (N − 1) （结果四舍五入取整数；仅有 1 支队伍参赛时计 100 分。） 各赛项得分计入该队伍所属代表团总成绩。如同一代表团有多支队伍参与同一赛项，该赛项仅取其中最高得分计入代表团总成绩，不重复累加。 每支代表团取成绩最优的四个赛项得分之和作为总成绩排名依据，且其中须至少包含「匠造空间通信」「业余卫星创想」两项中的一项。按总成绩从高到低排序，依次授予总冠军、总亚军、总季军。 同分处理顺序： ① 参赛赛项数量多者优先；② 相同赛项中最高得分高者优先；③ 如仍相同，由仲裁委员会以参赛项目的技术难度、创新性或完成度为依据进行裁定。 代表团如参加赛项不足四项，则按实际参赛赛项计算总积分，仍可参与总成绩排名。 总冠亚季军奖励（先选先得，每项仅限一支队伍，不可重复） 优先次序 奖励内容 赞助单位 1 免费卫星发射（力箭一号 7 kg 或力箭二号 15 kg） 中科宇航 2 免费天线机时（低轨卫星测控 365 圈） 航天驭星 3 免费在轨搭载（1 kg 卫星有效载荷上星） 中科天算 总冠军、总亚军、总季军按排名先后依次优先选择。具体兑现条件、搭载技术要求、时间安排等，由赞助单位与获奖队伍另行协商确定，以赞助单位最终公布的实施细则为准。 （三）专项奖 根据赛事资源和参赛作品情况，设立以下专项奖（可空缺）： 最佳工程实现奖 最佳创意设计奖 最佳通信性能奖 最佳空间教育奖 最佳国际协作奖 最佳青少年团队奖 最佳开源贡献奖 专项奖由评审委员会提名并评选，每项原则上授予 1 支队伍。如有特别优秀者，经评审委员会一致同意，可增设并列获奖或荣誉提名。 九、赛事流程 阶段 时间 报名阶段 即日起至 2026 年 7 月 10 日 现场报到 2026 年 7 月 20 日 开幕式 2026 年 7 月 21 日 上午 赛前培训 2026 年 7 月 21 日 下午 正式比赛 2026 年 7 月 21 日 晚 – 24 日 中午 闭幕式与颁奖 2026 年 7 月 24 日 下午 具体日程以现场秩序册为准。 十、报名方式 即日起至 2026 年 7 月 10 日，访问以下链接或扫码填写报名表： 🔗 https://e7qw4eih9eej56g3.mikecrm.com/5PTDbpv 参赛不收取报名费，交通及食宿自理，报到时须提交有效人身意外伤害保险单复印件。 十一、联系方式 事项 联系人 电话 技术咨询 张老师 14747715648 赛事保障 姚老师 13936690218 📧 联系邮箱： lilacsat@hit.edu.cn 十二、其他事项 本通知为第一轮通知，具体赛项规则、报名要求、评分细则、设备清单、时间安排、奖励办法和安全要求，以组委会后续发布的正式竞赛通知和技术文件为准。 赛事最新动态请持续关注 「哈工大本科教学」「北邮信息与通信工程学院」「紫丁香卫星」 等公众号及🔗 https://lilacsat.github.io/官方通知。 2026 国际空间通信挑战赛组织委员会 2026 年 6 月 29 日]]></summary></entry><entry><title type="html">2026 International Space Communication Challenge English Poster</title><link href="https://lilacsat.github.io/2026/06/26/2026-International-Space-Communication-Challenge-English-Poster.html" rel="alternate" type="text/html" title="2026 International Space Communication Challenge English Poster" /><published>2026-06-26T00:00:00+08:00</published><updated>2026-06-26T00:00:00+08:00</updated><id>https://lilacsat.github.io/2026/06/26/2026-International-Space-Communication-Challenge-English-Poster</id><content type="html" xml:base="https://lilacsat.github.io/2026/06/26/2026-International-Space-Communication-Challenge-English-Poster.html"><![CDATA[<p><img width="1000" height="1413" alt="poster1en_s" src="https://github.com/user-attachments/assets/bcfe1ec2-e595-4597-b16f-602af954a264" />
<img width="1000" height="1413" alt="poster2en_s" src="https://github.com/user-attachments/assets/81d0750f-2b05-4f75-8b46-4f22c0662c8a" /></p>]]></content><author><name>Your Name</name></author><summary type="html"><![CDATA[]]></summary></entry><entry><title type="html">2026国际空间通信挑战赛中文海报</title><link href="https://lilacsat.github.io/2026/06/26/2026%E5%9B%BD%E9%99%85%E7%A9%BA%E9%97%B4%E9%80%9A%E4%BF%A1%E6%8C%91%E6%88%98%E8%B5%9B%E4%B8%AD%E6%96%87%E6%B5%B7%E6%8A%A5.html" rel="alternate" type="text/html" title="2026国际空间通信挑战赛中文海报" /><published>2026-06-26T00:00:00+08:00</published><updated>2026-06-26T00:00:00+08:00</updated><id>https://lilacsat.github.io/2026/06/26/2026%E5%9B%BD%E9%99%85%E7%A9%BA%E9%97%B4%E9%80%9A%E4%BF%A1%E6%8C%91%E6%88%98%E8%B5%9B%E4%B8%AD%E6%96%87%E6%B5%B7%E6%8A%A5</id><content type="html" xml:base="https://lilacsat.github.io/2026/06/26/2026%E5%9B%BD%E9%99%85%E7%A9%BA%E9%97%B4%E9%80%9A%E4%BF%A1%E6%8C%91%E6%88%98%E8%B5%9B%E4%B8%AD%E6%96%87%E6%B5%B7%E6%8A%A5.html"><![CDATA[<p><img width="1000" height="1413" alt="poster1cn_s" src="https://github.com/user-attachments/assets/b675a361-add7-4aec-9593-1704c057b9c4" />
<img width="1000" height="1413" alt="poster2cn_s" src="https://github.com/user-attachments/assets/0ff102e0-070b-4cb2-bb6f-3d3ac585fb97" /></p>]]></content><author><name>Your Name</name></author><summary type="html"><![CDATA[]]></summary></entry><entry><title type="html">HamStation: An Open Source SSDV/PCSI Image &amp;amp; APRS Messaging Software</title><link href="https://lilacsat.github.io/2026/01/25/HamStation-An-Open-Source-SSDV-PCSI-Image-and-APRS-Messaging-Software.html" rel="alternate" type="text/html" title="HamStation: An Open Source SSDV/PCSI Image &amp;amp; APRS Messaging Software" /><published>2026-01-25T00:00:00+08:00</published><updated>2026-01-25T00:00:00+08:00</updated><id>https://lilacsat.github.io/2026/01/25/HamStation-An-Open-Source-SSDV-PCSI-Image-and-APRS-Messaging-Software</id><content type="html" xml:base="https://lilacsat.github.io/2026/01/25/HamStation-An-Open-Source-SSDV-PCSI-Image-and-APRS-Messaging-Software.html"><![CDATA[<p><img width="100%" alt="hamstation_main1" src="https://github.com/user-attachments/assets/e460a109-f127-46cb-8aca-432d718f04b5" /></p>

<h2 id="introduction">Introduction</h2>

<p><strong>HamStation</strong> is an amateur radio communication software designed for Windows. It facilitates image and short message transmission over VHF/UHF analog FM channels and is suitable for both terrestrial and satellite communication scenarios.</p>

<p>HamStation features built-in support for both English and Chinese.</p>

<h2 id="main-features">Main Features</h2>

<p>The software supports two image encoding formats:</p>
<ul>
  <li>SSDV Format: A specialized implementation based on JPEG that allows for image recovery and display even when some data packets are lost.</li>
  <li>PCSI Format: Utilizes Compressed Sensing technology where each data packet contains partial information of the complete image. The image clarity progressively improves as the number of received packets increases.</li>
</ul>

<p>Image Transmission supports 1200 or 2400bps AFSK modulation with the following selectable data protocols:</p>
<ul>
  <li>AX.25 Protocol: Compatible with common soundmodem software and built-in radio modems (TNCs).</li>
  <li>CCSDS Protocol: Uses Reed-Solomon Forward Error Correction (FEC) for better sensitivity.</li>
</ul>

<p>Additionally, HamStation supports sending, receiving, and forwarding APRS short messages at a rate of 1200bps and provides basic QSO logging functionality.</p>

<p><strong>Demo:</strong> To see the effects of the different image transmission modes, please visit: <a href="https://www.bilibili.com/video/BV1WP4y1q7Ly/">https://www.bilibili.com/video/BV1WP4y1q7Ly/</a></p>

<h2 id="development-team">Development Team</h2>

<ul>
  <li>HIT LilacSat Student Micro/nano-satellite Team</li>
  <li>HIT Amateur Radio Club (BY2HIT)</li>
  <li>HIT Open Source Student Club</li>
  <li>HIT Lilac CTF Team</li>
</ul>

<p><strong>Key Developers:</strong> Logiase, leylee, LittleQ, Sora, bg2bhc</p>

<h2 id="file-structure">File Structure</h2>

<ul>
  <li><strong>controller.exe:</strong> The main application program.</li>
  <li><strong>data (folder):</strong> Stores operation logs and other data.</li>
  <li><strong>panel.yaml:</strong> Default interface parameters can be modified here.</li>
  <li><strong>Modem Programs:</strong> arcssd-ax25.exe, arcssd-ccsds-1200.exe, arcssd-ccsds-2400.exe</li>
</ul>

<h2 id="choosing-the-right-modem-program">Choosing the Right Modem Program</h2>

<p>The arcssd folder contains three versions of the modem: invemphasis, noemphasis, and noemphasis_noshare.</p>
<ul>
  <li><strong>invemphasis:</strong> Suitable for standard FM radios with audio pre-emphasis enabled (this is the default version used in the package).</li>
  <li><strong>noemphasis:</strong> Suitable for FM radios where pre-emphasis can be turned off, or for the “9600 mode” on certain radios. This version offers better modulation/demodulation performance.</li>
  <li><strong>noemphasis_noshare:</strong> Based on noemphasis, but enables Exclusive Mode for the sound card, offering better stability for long-term operation.</li>
</ul>

<h2 id="device-setup">Device Setup</h2>

<ul>
  <li><strong>Audio:</strong> The software transmits and receives data via the radio’s audio interface (USB audio or analog audio/mic/spk jacks are both supported).</li>
  <li><strong>PTT Control:</strong> Supported via Serial Port RTS or DTR. Alternatively, select “None” to use manual PTT or the radio’s VOX function.</li>
</ul>

<h2 id="known-issues">Known Issues</h2>

<ul>
  <li><strong>Windows 11 Audio Device Names:</strong> On some Windows 11 computers, the backend may fail to start due to character encoding issues with the built-in sound card’s device name. Try renaming the audio device in Windows settings, or switch to a USB sound card or virtual audio cable.</li>
  <li><strong>2400 Mode Audio Quality:</strong> The 2400bps mode requires high audio flatness from the radio. If you experience high packet loss, try adjusting the radio’s audio balance/EQ configuration.</li>
  <li><strong>Antivirus Alerts:</strong> The packaged .exe file may trigger false positive warnings from antivirus software. Run the Python source code directly, re-package the software locally on your own machine, or run the software in a sandbox environment.</li>
</ul>

<h2 id="software-download">Software Download</h2>

<p>For source code</p>
<ul>
  <li>Frontend: <a href="https://github.com/by2hit/arcss_panel_pc">https://github.com/by2hit/arcss_panel_pc</a></li>
  <li>Modem: <a href="https://github.com/by2hit/arcssd-go">https://github.com/by2hit/arcssd-go</a></li>
  <li>PCSI: <a href="https://github.com/by2hit/pcsi">https://github.com/by2hit/pcsi</a></li>
</ul>

<p>For packaged binaries</p>
<ul>
  <li><a href="https://github.com/by2hit/arcss_panel_pc/releases/download/v1.0/HamStation_20230609.zip">https://github.com/by2hit/arcss_panel_pc/releases/download/v1.0/HamStation_20230609.zip</a></li>
</ul>]]></content><author><name>Your Name</name></author><summary type="html"><![CDATA[Introduction HamStation is an amateur radio communication software designed for Windows. It facilitates image and short message transmission over VHF/UHF analog FM channels and is suitable for both terrestrial and satellite communication scenarios. HamStation features built-in support for both English and Chinese. Main Features The software supports two image encoding formats: SSDV Format: A specialized implementation based on JPEG that allows for image recovery and display even when some data packets are lost. PCSI Format: Utilizes Compressed Sensing technology where each data packet contains partial information of the complete image. The image clarity progressively improves as the number of received packets increases. Image Transmission supports 1200 or 2400bps AFSK modulation with the following selectable data protocols: AX.25 Protocol: Compatible with common soundmodem software and built-in radio modems (TNCs). CCSDS Protocol: Uses Reed-Solomon Forward Error Correction (FEC) for better sensitivity. Additionally, HamStation supports sending, receiving, and forwarding APRS short messages at a rate of 1200bps and provides basic QSO logging functionality. Demo: To see the effects of the different image transmission modes, please visit: https://www.bilibili.com/video/BV1WP4y1q7Ly/ Development Team HIT LilacSat Student Micro/nano-satellite Team HIT Amateur Radio Club (BY2HIT) HIT Open Source Student Club HIT Lilac CTF Team Key Developers: Logiase, leylee, LittleQ, Sora, bg2bhc File Structure controller.exe: The main application program. data (folder): Stores operation logs and other data. panel.yaml: Default interface parameters can be modified here. Modem Programs: arcssd-ax25.exe, arcssd-ccsds-1200.exe, arcssd-ccsds-2400.exe Choosing the Right Modem Program The arcssd folder contains three versions of the modem: invemphasis, noemphasis, and noemphasis_noshare. invemphasis: Suitable for standard FM radios with audio pre-emphasis enabled (this is the default version used in the package). noemphasis: Suitable for FM radios where pre-emphasis can be turned off, or for the “9600 mode” on certain radios. This version offers better modulation/demodulation performance. noemphasis_noshare: Based on noemphasis, but enables Exclusive Mode for the sound card, offering better stability for long-term operation. Device Setup Audio: The software transmits and receives data via the radio’s audio interface (USB audio or analog audio/mic/spk jacks are both supported). PTT Control: Supported via Serial Port RTS or DTR. Alternatively, select “None” to use manual PTT or the radio’s VOX function. Known Issues Windows 11 Audio Device Names: On some Windows 11 computers, the backend may fail to start due to character encoding issues with the built-in sound card’s device name. Try renaming the audio device in Windows settings, or switch to a USB sound card or virtual audio cable. 2400 Mode Audio Quality: The 2400bps mode requires high audio flatness from the radio. If you experience high packet loss, try adjusting the radio’s audio balance/EQ configuration. Antivirus Alerts: The packaged .exe file may trigger false positive warnings from antivirus software. Run the Python source code directly, re-package the software locally on your own machine, or run the software in a sandbox environment. Software Download For source code Frontend: https://github.com/by2hit/arcss_panel_pc Modem: https://github.com/by2hit/arcssd-go PCSI: https://github.com/by2hit/pcsi For packaged binaries https://github.com/by2hit/arcss_panel_pc/releases/download/v1.0/HamStation_20230609.zip]]></summary></entry><entry><title type="html">Radio Link Budgets of VR2Sat</title><link href="https://lilacsat.github.io/2025/11/09/Radio-Link-Budgets-of-VR2Sat.html" rel="alternate" type="text/html" title="Radio Link Budgets of VR2Sat" /><published>2025-11-09T00:00:00+08:00</published><updated>2025-11-09T00:00:00+08:00</updated><id>https://lilacsat.github.io/2025/11/09/Radio-Link-Budgets-of-VR2Sat</id><content type="html" xml:base="https://lilacsat.github.io/2025/11/09/Radio-Link-Budgets-of-VR2Sat.html"><![CDATA[<p>VR2Sat is the amateur radio payload of the Hong Kong Popular Science Satellite, proposed by the Textile Institute American Chamber of Commerce Woo Hon Fai Secondary School Amateur Radio Club (VR2XHF), and is planned to be deployed into a 385 km, 41.5-degree inclination orbit in Q3 2026.</p>

<h2 id="vhf-uplink">VHF Uplink</h2>

<table>
  <thead>
    <tr>
      <th> </th>
      <th>Data</th>
      <th>Unit</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Frequency</td>
      <td>145.9</td>
      <td>MHz</td>
    </tr>
    <tr>
      <td>Distance</td>
      <td>1399.3</td>
      <td>km</td>
    </tr>
    <tr>
      <td>Modulation Type</td>
      <td>FM</td>
      <td>-</td>
    </tr>
    <tr>
      <td>TX Power</td>
      <td>7</td>
      <td>dBW</td>
    </tr>
    <tr>
      <td>TX Gain</td>
      <td>5</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>Ant Polarization Loss</td>
      <td>3</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Free Space Loss</td>
      <td>138.6</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Other Path Loss</td>
      <td>1</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>RX Gain</td>
      <td>-6</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>RX Input Level</td>
      <td>-106.6</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>Sensitivity</td>
      <td>-110</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>Margin</td>
      <td>3.4</td>
      <td>dB</td>
    </tr>
  </tbody>
</table>

<h2 id="uhf-downlink">UHF Downlink</h2>

<table>
  <thead>
    <tr>
      <th> </th>
      <th>Data</th>
      <th>Unit</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Frequency</td>
      <td>437</td>
      <td>MHz</td>
    </tr>
    <tr>
      <td>Distance</td>
      <td>1399.3</td>
      <td>km</td>
    </tr>
    <tr>
      <td>Modulation Type</td>
      <td>FM</td>
      <td>-</td>
    </tr>
    <tr>
      <td>TX Power</td>
      <td>0</td>
      <td>dBW</td>
    </tr>
    <tr>
      <td>TX Gain</td>
      <td>-6</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>Ant Polarization Loss</td>
      <td>3</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Free Space Loss</td>
      <td>148.2</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Other Path Loss</td>
      <td>1</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>RX Gain</td>
      <td>10</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>RX Input Level</td>
      <td>-118.2</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>Sensitivity</td>
      <td>-121</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>Margin</td>
      <td>2.8</td>
      <td>dB</td>
    </tr>
  </tbody>
</table>]]></content><author><name>Your Name</name></author><summary type="html"><![CDATA[VR2Sat is the amateur radio payload of the Hong Kong Popular Science Satellite, proposed by the Textile Institute American Chamber of Commerce Woo Hon Fai Secondary School Amateur Radio Club (VR2XHF), and is planned to be deployed into a 385 km, 41.5-degree inclination orbit in Q3 2026. VHF Uplink   Data Unit Frequency 145.9 MHz Distance 1399.3 km Modulation Type FM - TX Power 7 dBW TX Gain 5 dBi Ant Polarization Loss 3 dB Free Space Loss 138.6 dB Other Path Loss 1 dB RX Gain -6 dBi RX Input Level -106.6 dBm Sensitivity -110 dBm Margin 3.4 dB UHF Downlink   Data Unit Frequency 437 MHz Distance 1399.3 km Modulation Type FM - TX Power 0 dBW TX Gain -6 dBi Ant Polarization Loss 3 dB Free Space Loss 148.2 dB Other Path Loss 1 dB RX Gain 10 dBi RX Input Level -118.2 dBm Sensitivity -121 dBm Margin 2.8 dB]]></summary></entry><entry><title type="html">ASRTU-1 Satellite</title><link href="https://lilacsat.github.io/2024/12/11/ASRTU-1-Satellite.html" rel="alternate" type="text/html" title="ASRTU-1 Satellite" /><published>2024-12-11T00:00:00+08:00</published><updated>2024-12-11T00:00:00+08:00</updated><id>https://lilacsat.github.io/2024/12/11/ASRTU-1-Satellite</id><content type="html" xml:base="https://lilacsat.github.io/2024/12/11/ASRTU-1-Satellite.html"><![CDATA[<p>Frequency
435.4
436.21</p>]]></content><author><name>Your Name</name></author><summary type="html"><![CDATA[Frequency 435.4 436.21]]></summary></entry><entry><title type="html">Radio Link Budgets of CSSARC</title><link href="https://lilacsat.github.io/2022/03/05/Radio-Link-Budgets-of-CSSARC.html" rel="alternate" type="text/html" title="Radio Link Budgets of CSSARC" /><published>2022-03-05T00:00:00+08:00</published><updated>2022-03-05T00:00:00+08:00</updated><id>https://lilacsat.github.io/2022/03/05/Radio-Link-Budgets-of-CSSARC</id><content type="html" xml:base="https://lilacsat.github.io/2022/03/05/Radio-Link-Budgets-of-CSSARC.html"><![CDATA[<h2 id="vhf-uplink">VHF Uplink</h2>

<table>
  <thead>
    <tr>
      <th> </th>
      <th>Data</th>
      <th>Unit</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Frequency</td>
      <td>145.9</td>
      <td>MHz</td>
    </tr>
    <tr>
      <td>Distance</td>
      <td>1804</td>
      <td>km</td>
    </tr>
    <tr>
      <td>Modulation Type</td>
      <td>FM</td>
      <td>-</td>
    </tr>
    <tr>
      <td>TX Power</td>
      <td>7</td>
      <td>dBw</td>
    </tr>
    <tr>
      <td>TX Gain</td>
      <td>7</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>Ant Polarization Loss</td>
      <td>3</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Free Space Loss</td>
      <td>140.9</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Other Path Loss</td>
      <td>1</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>RX Gain</td>
      <td>-6</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>RX Input Level</td>
      <td>-106.9</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>Sensitivity</td>
      <td>-121</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>Margin</td>
      <td>14.1</td>
      <td>dB</td>
    </tr>
  </tbody>
</table>

<h2 id="vhf-downlink">VHF Downlink</h2>

<table>
  <thead>
    <tr>
      <th> </th>
      <th>Data</th>
      <th>Unit</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Frequency</td>
      <td>145.9</td>
      <td>MHz</td>
    </tr>
    <tr>
      <td>Distance</td>
      <td>1804</td>
      <td>km</td>
    </tr>
    <tr>
      <td>Modulation Type</td>
      <td>FM</td>
      <td>-</td>
    </tr>
    <tr>
      <td>TX Power</td>
      <td>10</td>
      <td>dBw</td>
    </tr>
    <tr>
      <td>TX Gain</td>
      <td>-6</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>Ant Polarization Loss</td>
      <td>3</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Free Space Loss</td>
      <td>140.9</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Other Path Loss</td>
      <td>1</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>RX Gain</td>
      <td>7</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>RX Input Level</td>
      <td>-103.9</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>Sensitivity</td>
      <td>-121</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>Margin</td>
      <td>17.1</td>
      <td>dB</td>
    </tr>
  </tbody>
</table>

<h2 id="uhf-uplink">UHF Uplink</h2>

<table>
  <thead>
    <tr>
      <th> </th>
      <th>Data</th>
      <th>Unit</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Frequency</td>
      <td>437</td>
      <td>MHz</td>
    </tr>
    <tr>
      <td>Distance</td>
      <td>1804</td>
      <td>km</td>
    </tr>
    <tr>
      <td>Modulation Type</td>
      <td>FM</td>
      <td>-</td>
    </tr>
    <tr>
      <td>TX Power</td>
      <td>7</td>
      <td>dBw</td>
    </tr>
    <tr>
      <td>TX Gain</td>
      <td>10</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>Ant Polarization Loss</td>
      <td>3</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Free Space Loss</td>
      <td>150.4</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Other Path Loss</td>
      <td>1</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>RX Gain</td>
      <td>-6</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>RX Input Level</td>
      <td>-113.4</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>Sensitivity</td>
      <td>-121</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>Margin</td>
      <td>7.6</td>
      <td>dB</td>
    </tr>
  </tbody>
</table>

<h2 id="uhf-downlink">UHF Downlink</h2>

<table>
  <thead>
    <tr>
      <th> </th>
      <th>Data</th>
      <th>Unit</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Frequency</td>
      <td>437</td>
      <td>MHz</td>
    </tr>
    <tr>
      <td>Distance</td>
      <td>1804</td>
      <td>km</td>
    </tr>
    <tr>
      <td>Modulation Type</td>
      <td>FM</td>
      <td>-</td>
    </tr>
    <tr>
      <td>TX Power</td>
      <td>10</td>
      <td>dBw</td>
    </tr>
    <tr>
      <td>TX Gain</td>
      <td>-6</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>Ant Polarization Loss</td>
      <td>3</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Free Space Loss</td>
      <td>150.4</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Other Path Loss</td>
      <td>1</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>RX Gain</td>
      <td>10</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>RX Input Level</td>
      <td>-110.4</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>Sensitivity</td>
      <td>-121</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>Margin</td>
      <td>10.6</td>
      <td>dB</td>
    </tr>
  </tbody>
</table>]]></content><author><name>Your Name</name></author><summary type="html"><![CDATA[VHF Uplink   Data Unit Frequency 145.9 MHz Distance 1804 km Modulation Type FM - TX Power 7 dBw TX Gain 7 dBi Ant Polarization Loss 3 dB Free Space Loss 140.9 dB Other Path Loss 1 dB RX Gain -6 dBi RX Input Level -106.9 dBm Sensitivity -121 dBm Margin 14.1 dB VHF Downlink   Data Unit Frequency 145.9 MHz Distance 1804 km Modulation Type FM - TX Power 10 dBw TX Gain -6 dBi Ant Polarization Loss 3 dB Free Space Loss 140.9 dB Other Path Loss 1 dB RX Gain 7 dBi RX Input Level -103.9 dBm Sensitivity -121 dBm Margin 17.1 dB UHF Uplink   Data Unit Frequency 437 MHz Distance 1804 km Modulation Type FM - TX Power 7 dBw TX Gain 10 dBi Ant Polarization Loss 3 dB Free Space Loss 150.4 dB Other Path Loss 1 dB RX Gain -6 dBi RX Input Level -113.4 dBm Sensitivity -121 dBm Margin 7.6 dB UHF Downlink   Data Unit Frequency 437 MHz Distance 1804 km Modulation Type FM - TX Power 10 dBw TX Gain -6 dBi Ant Polarization Loss 3 dB Free Space Loss 150.4 dB Other Path Loss 1 dB RX Gain 10 dBi RX Input Level -110.4 dBm Sensitivity -121 dBm Margin 10.6 dB]]></summary></entry><entry><title type="html">Radio Link Budgets of Lunar OSCAR II</title><link href="https://lilacsat.github.io/2022/03/05/Radio-Link-Budgets-of-Lunar-OSCAR-II.html" rel="alternate" type="text/html" title="Radio Link Budgets of Lunar OSCAR II" /><published>2022-03-05T00:00:00+08:00</published><updated>2022-03-05T00:00:00+08:00</updated><id>https://lilacsat.github.io/2022/03/05/Radio-Link-Budgets-of-Lunar-OSCAR-II</id><content type="html" xml:base="https://lilacsat.github.io/2022/03/05/Radio-Link-Budgets-of-Lunar-OSCAR-II.html"><![CDATA[<h2 id="telemetryimage-downlink">Telemetry/Image Downlink</h2>

<table>
  <thead>
    <tr>
      <th>Item</th>
      <th>Reliable Link</th>
      <th>Lucky Case</th>
      <th>Unit</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Frequency</td>
      <td>437</td>
      <td>437</td>
      <td>MHz</td>
    </tr>
    <tr>
      <td>Distance</td>
      <td>400000</td>
      <td>380000</td>
      <td>km</td>
    </tr>
    <tr>
      <td>Modulation Type</td>
      <td>GMSK</td>
      <td>GMSK</td>
      <td>-</td>
    </tr>
    <tr>
      <td>TX Power</td>
      <td>3</td>
      <td>3</td>
      <td>dBW</td>
    </tr>
    <tr>
      <td>TX Gain</td>
      <td>-6</td>
      <td>-1</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>Ant Polarization Loss</td>
      <td>3</td>
      <td>1</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Free Space Loss</td>
      <td>197.3</td>
      <td>196.8</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Other Path Loss</td>
      <td>1</td>
      <td>1</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>RX Gain</td>
      <td>30</td>
      <td>22</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>RX Input Level</td>
      <td>-144.3</td>
      <td>-145.8</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>System Noise Figure</td>
      <td>2</td>
      <td>2</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Receiver C/N0</td>
      <td>27.7</td>
      <td>26.2</td>
      <td>dBHz</td>
    </tr>
    <tr>
      <td>Data Rate</td>
      <td>125</td>
      <td>125</td>
      <td>bps</td>
    </tr>
    <tr>
      <td>Required Eb/N0</td>
      <td>1.0</td>
      <td>1.0</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Implementation Loss</td>
      <td>2</td>
      <td>2</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>C/N0 Threshold</td>
      <td>24.0</td>
      <td>24.0</td>
      <td>dBHz</td>
    </tr>
    <tr>
      <td>Margin</td>
      <td>3.7</td>
      <td>2.2</td>
      <td>dB</td>
    </tr>
  </tbody>
</table>

<h2 id="digipeater-downlink">Digipeater Downlink</h2>

<table>
  <thead>
    <tr>
      <th>Item</th>
      <th>Reliable Link</th>
      <th>Lucky Case</th>
      <th>Unit</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Frequency</td>
      <td>437</td>
      <td>437</td>
      <td>MHz</td>
    </tr>
    <tr>
      <td>Distance</td>
      <td>400000</td>
      <td>380000</td>
      <td>km</td>
    </tr>
    <tr>
      <td>Modulation Type</td>
      <td>JT4G</td>
      <td>JT4G</td>
      <td>-</td>
    </tr>
    <tr>
      <td>TX Power</td>
      <td>3</td>
      <td>3</td>
      <td>dBW</td>
    </tr>
    <tr>
      <td>TX Gain</td>
      <td>-6</td>
      <td>-1</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>Ant Polarization Loss</td>
      <td>3</td>
      <td>1</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Free Space Loss</td>
      <td>197.3</td>
      <td>196.8</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Other Path Loss</td>
      <td>1</td>
      <td>1</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>RX Gain</td>
      <td>22</td>
      <td>15</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>RX Input Level</td>
      <td>-152.3</td>
      <td>-152.8</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>System Noise Figure</td>
      <td>2</td>
      <td>2</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Receiver C/N0</td>
      <td>19.7</td>
      <td>19.2</td>
      <td>dBHz</td>
    </tr>
    <tr>
      <td>C/N0 Threshold</td>
      <td>17.0</td>
      <td>17.0</td>
      <td>dBHz</td>
    </tr>
    <tr>
      <td>Margin</td>
      <td>2.7</td>
      <td>2.2</td>
      <td>dB</td>
    </tr>
  </tbody>
</table>

<h2 id="command-uplink">Command Uplink</h2>

<table>
  <thead>
    <tr>
      <th>Item</th>
      <th>Value</th>
      <th>Unit</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Frequency</td>
      <td>437</td>
      <td>MHz</td>
    </tr>
    <tr>
      <td>Distance</td>
      <td>400000</td>
      <td>km</td>
    </tr>
    <tr>
      <td>Modulation Type</td>
      <td>GMSK</td>
      <td>-</td>
    </tr>
    <tr>
      <td>TX Power</td>
      <td>23</td>
      <td>dBW</td>
    </tr>
    <tr>
      <td>TX Gain</td>
      <td>22</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>Ant Polarization Loss</td>
      <td>3</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Free Space Loss</td>
      <td>197.3</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Other Path Loss</td>
      <td>1</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>RX Gain</td>
      <td>-6</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>RX Input Level</td>
      <td>-132.3</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>Sensitivity</td>
      <td>-140</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>Margin</td>
      <td>7.7</td>
      <td>dB</td>
    </tr>
  </tbody>
</table>

<h2 id="digipeater-uplink">Digipeater Uplink</h2>

<table>
  <thead>
    <tr>
      <th>Item</th>
      <th>Value</th>
      <th>Unit</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Frequency</td>
      <td>437</td>
      <td>MHz</td>
    </tr>
    <tr>
      <td>Distance</td>
      <td>400000</td>
      <td>km</td>
    </tr>
    <tr>
      <td>Modulation Type</td>
      <td>JT4G</td>
      <td>-</td>
    </tr>
    <tr>
      <td>TX Power</td>
      <td>14</td>
      <td>dBW</td>
    </tr>
    <tr>
      <td>TX Gain</td>
      <td>22</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>Ant Polarization Loss</td>
      <td>3</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Free Space Loss</td>
      <td>197.3</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Other Path Loss</td>
      <td>1</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>RX Gain</td>
      <td>-6</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>RX Input Level</td>
      <td>-141.3</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>System Noise Figure</td>
      <td>10</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Receiver C/N0</td>
      <td>22.7</td>
      <td>dBHz</td>
    </tr>
    <tr>
      <td>C/N0 Threshold</td>
      <td>17.0</td>
      <td>dBHz</td>
    </tr>
    <tr>
      <td>Margin</td>
      <td>5.7</td>
      <td>dB</td>
    </tr>
  </tbody>
</table>]]></content><author><name>Your Name</name></author><summary type="html"><![CDATA[Telemetry/Image Downlink Item Reliable Link Lucky Case Unit Frequency 437 437 MHz Distance 400000 380000 km Modulation Type GMSK GMSK - TX Power 3 3 dBW TX Gain -6 -1 dBi Ant Polarization Loss 3 1 dB Free Space Loss 197.3 196.8 dB Other Path Loss 1 1 dB RX Gain 30 22 dBi RX Input Level -144.3 -145.8 dBm System Noise Figure 2 2 dB Receiver C/N0 27.7 26.2 dBHz Data Rate 125 125 bps Required Eb/N0 1.0 1.0 dB Implementation Loss 2 2 dB C/N0 Threshold 24.0 24.0 dBHz Margin 3.7 2.2 dB Digipeater Downlink Item Reliable Link Lucky Case Unit Frequency 437 437 MHz Distance 400000 380000 km Modulation Type JT4G JT4G - TX Power 3 3 dBW TX Gain -6 -1 dBi Ant Polarization Loss 3 1 dB Free Space Loss 197.3 196.8 dB Other Path Loss 1 1 dB RX Gain 22 15 dBi RX Input Level -152.3 -152.8 dBm System Noise Figure 2 2 dB Receiver C/N0 19.7 19.2 dBHz C/N0 Threshold 17.0 17.0 dBHz Margin 2.7 2.2 dB Command Uplink Item Value Unit Frequency 437 MHz Distance 400000 km Modulation Type GMSK - TX Power 23 dBW TX Gain 22 dBi Ant Polarization Loss 3 dB Free Space Loss 197.3 dB Other Path Loss 1 dB RX Gain -6 dBi RX Input Level -132.3 dBm Sensitivity -140 dBm Margin 7.7 dB Digipeater Uplink Item Value Unit Frequency 437 MHz Distance 400000 km Modulation Type JT4G - TX Power 14 dBW TX Gain 22 dBi Ant Polarization Loss 3 dB Free Space Loss 197.3 dB Other Path Loss 1 dB RX Gain -6 dBi RX Input Level -141.3 dBm System Noise Figure 10 dB Receiver C/N0 22.7 dBHz C/N0 Threshold 17.0 dBHz Margin 5.7 dB]]></summary></entry><entry><title type="html">Radio Link Budgets of ASRTU-1 Satellite</title><link href="https://lilacsat.github.io/2021/10/04/Radio-Link-Budgets-of-ASRTU-1-Satellite.html" rel="alternate" type="text/html" title="Radio Link Budgets of ASRTU-1 Satellite" /><published>2021-10-04T00:00:00+08:00</published><updated>2021-10-04T00:00:00+08:00</updated><id>https://lilacsat.github.io/2021/10/04/Radio-Link-Budgets-of-ASRTU-1-Satellite</id><content type="html" xml:base="https://lilacsat.github.io/2021/10/04/Radio-Link-Budgets-of-ASRTU-1-Satellite.html"><![CDATA[<h2 id="command-uplink">Command Uplink</h2>

<table>
  <thead>
    <tr>
      <th> </th>
      <th>Data</th>
      <th>Unit</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Frequency</td>
      <td>145.8</td>
      <td>MHz</td>
    </tr>
    <tr>
      <td>Modulation Type</td>
      <td>FSK-FM</td>
      <td>-</td>
    </tr>
    <tr>
      <td>Data Rate</td>
      <td>1000</td>
      <td>bps</td>
    </tr>
    <tr>
      <td>Distance</td>
      <td>2226</td>
      <td>km</td>
    </tr>
    <tr>
      <td>TX Power</td>
      <td>7</td>
      <td>dBw</td>
    </tr>
    <tr>
      <td>TX Gain</td>
      <td>14</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>Ant Polarization Loss</td>
      <td>3</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Path Loss</td>
      <td>142.6</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>RX Gain</td>
      <td>-6</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>Implementation Loss</td>
      <td>1.0</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>RX Input Level</td>
      <td>-101.6</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>Sensitivity</td>
      <td>-105</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>Margin</td>
      <td>3.3</td>
      <td>dB</td>
    </tr>
  </tbody>
</table>

<h2 id="telemetry-downlink">Telemetry Downlink</h2>

<table>
  <thead>
    <tr>
      <th> </th>
      <th>Data</th>
      <th>Unit</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Frequency</td>
      <td>436.2</td>
      <td>MHz</td>
    </tr>
    <tr>
      <td>Modulation Type</td>
      <td>BPSK</td>
      <td>-</td>
    </tr>
    <tr>
      <td>Data Rate</td>
      <td>9600</td>
      <td>bps</td>
    </tr>
    <tr>
      <td>Distance</td>
      <td>2226</td>
      <td>km</td>
    </tr>
    <tr>
      <td>TX Power</td>
      <td>-3</td>
      <td>dBw</td>
    </tr>
    <tr>
      <td>TX Gain</td>
      <td>-6</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>Ant Polarization Loss</td>
      <td>3</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Path Loss</td>
      <td>152.2</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>RX Gain</td>
      <td>17.5</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>Noise Figure</td>
      <td>2</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Required Eb/N0</td>
      <td>9.6</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Implementation Loss</td>
      <td>2</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Coding Gain</td>
      <td>6</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Margin</td>
      <td>3.3</td>
      <td>dB</td>
    </tr>
  </tbody>
</table>

<h2 id="fm-repeater-uplink">FM Repeater Uplink</h2>

<table>
  <thead>
    <tr>
      <th> </th>
      <th>Data</th>
      <th>Unit</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Frequency</td>
      <td>145.8</td>
      <td>MHz</td>
    </tr>
    <tr>
      <td>Distance</td>
      <td>1535</td>
      <td>km</td>
    </tr>
    <tr>
      <td>Modulation Type</td>
      <td>FM</td>
      <td>-</td>
    </tr>
    <tr>
      <td>TX Power</td>
      <td>7</td>
      <td>dBw</td>
    </tr>
    <tr>
      <td>TX Gain</td>
      <td>7</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>Ant Polarization Loss</td>
      <td>3</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Free Space Loss</td>
      <td>139.4</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Other Path Loss</td>
      <td>1</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>RX Gain</td>
      <td>-6</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>RX Input Level</td>
      <td>-105</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>Sensitivity</td>
      <td>-112</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>Margin</td>
      <td>6.5</td>
      <td>dB</td>
    </tr>
  </tbody>
</table>

<h2 id="fm-repeater-downlink">FM Repeater Downlink</h2>

<table>
  <thead>
    <tr>
      <th> </th>
      <th>Data</th>
      <th>Unit</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Frequency</td>
      <td>435.4</td>
      <td>MHz</td>
    </tr>
    <tr>
      <td>Distance</td>
      <td>1535</td>
      <td>km</td>
    </tr>
    <tr>
      <td>Modulation Type</td>
      <td>FM</td>
      <td>-</td>
    </tr>
    <tr>
      <td>TX Power</td>
      <td>-3</td>
      <td>dBw</td>
    </tr>
    <tr>
      <td>TX Gain</td>
      <td>-6</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>Ant Polarization Loss</td>
      <td>3</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Free Space Loss</td>
      <td>148.9</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Other Path Loss</td>
      <td>1</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>RX Gain</td>
      <td>14</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>RX Input Level</td>
      <td>-117.9</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>Sensitivity</td>
      <td>-121</td>
      <td>dBm</td>
    </tr>
    <tr>
      <td>Margin</td>
      <td>3</td>
      <td>dB</td>
    </tr>
  </tbody>
</table>

<h2 id="image-downlink">Image Downlink</h2>

<table>
  <thead>
    <tr>
      <th> </th>
      <th>Data</th>
      <th>Data</th>
      <th>Unit</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Frequency</td>
      <td>10.46</td>
      <td>10.46</td>
      <td>GHz</td>
    </tr>
    <tr>
      <td>Modulation Type</td>
      <td>QPSK</td>
      <td>QPSK</td>
      <td>-</td>
    </tr>
    <tr>
      <td>Data Rate</td>
      <td>1</td>
      <td>10</td>
      <td>Mbps</td>
    </tr>
    <tr>
      <td>Distance</td>
      <td>1535</td>
      <td>1535</td>
      <td>km</td>
    </tr>
    <tr>
      <td>TX Power</td>
      <td>3</td>
      <td>3</td>
      <td>dBw</td>
    </tr>
    <tr>
      <td>TX Gain</td>
      <td>5</td>
      <td>12</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>Ant Polarization Loss</td>
      <td>3</td>
      <td>3</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Path Loss</td>
      <td>175.7</td>
      <td>175.7</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>RX Gain</td>
      <td>42</td>
      <td>45</td>
      <td>dBi</td>
    </tr>
    <tr>
      <td>Noise Figure</td>
      <td>2.0</td>
      <td>2.0</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Required Eb/N0</td>
      <td>2.6</td>
      <td>2.6</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Implementation Loss</td>
      <td>2.0</td>
      <td>2.0</td>
      <td>dB</td>
    </tr>
    <tr>
      <td>Margin</td>
      <td>3.8</td>
      <td>3.8</td>
      <td>dB</td>
    </tr>
  </tbody>
</table>]]></content><author><name>Your Name</name></author><summary type="html"><![CDATA[Command Uplink   Data Unit Frequency 145.8 MHz Modulation Type FSK-FM - Data Rate 1000 bps Distance 2226 km TX Power 7 dBw TX Gain 14 dBi Ant Polarization Loss 3 dB Path Loss 142.6 dB RX Gain -6 dBi Implementation Loss 1.0 dB RX Input Level -101.6 dBm Sensitivity -105 dBm Margin 3.3 dB Telemetry Downlink   Data Unit Frequency 436.2 MHz Modulation Type BPSK - Data Rate 9600 bps Distance 2226 km TX Power -3 dBw TX Gain -6 dBi Ant Polarization Loss 3 dB Path Loss 152.2 dB RX Gain 17.5 dBi Noise Figure 2 dB Required Eb/N0 9.6 dB Implementation Loss 2 dB Coding Gain 6 dB Margin 3.3 dB FM Repeater Uplink   Data Unit Frequency 145.8 MHz Distance 1535 km Modulation Type FM - TX Power 7 dBw TX Gain 7 dBi Ant Polarization Loss 3 dB Free Space Loss 139.4 dB Other Path Loss 1 dB RX Gain -6 dBi RX Input Level -105 dBm Sensitivity -112 dBm Margin 6.5 dB FM Repeater Downlink   Data Unit Frequency 435.4 MHz Distance 1535 km Modulation Type FM - TX Power -3 dBw TX Gain -6 dBi Ant Polarization Loss 3 dB Free Space Loss 148.9 dB Other Path Loss 1 dB RX Gain 14 dBi RX Input Level -117.9 dBm Sensitivity -121 dBm Margin 3 dB Image Downlink   Data Data Unit Frequency 10.46 10.46 GHz Modulation Type QPSK QPSK - Data Rate 1 10 Mbps Distance 1535 1535 km TX Power 3 3 dBw TX Gain 5 12 dBi Ant Polarization Loss 3 3 dB Path Loss 175.7 175.7 dB RX Gain 42 45 dBi Noise Figure 2.0 2.0 dB Required Eb/N0 2.6 2.6 dB Implementation Loss 2.0 2.0 dB Margin 3.8 3.8 dB]]></summary></entry></feed>