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| <h1>AsiaSat 1</h1>
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| <li><a href="../index.html">Home</a></li>
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| <li><a href="../directories/sat_c.htm">Spacecraft by country</a></li>
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| <li><a href="../directories/sat_c_china.htm">China</a></li>
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| <div id="satdescription">
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| <div id="contimg" class="ibox"><img alt="" src="../img_sat/westar-4__1.jpg" width="155" height="300"><p>AsiaSat 1 [Boeing BSS]</p></div>
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| <p>Hughes' Space and Communications Group built three Hughes <a href="../doc_sat/hs-376.htm">HS-376</a> model satellites, designated <a href="westar-4.htm">Westar 4, 5 and 6</a>, for Western Union Telegraph Company. These new
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| spacecraft stand 21.6 feet tall in operation and carry 24 C-band transponders, each of
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| which can accommodate 2400 telephone calls or one color TV channel.</p>
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| <p><a href="westar-4.htm">Westar 6</a> was launched from the space shuttle in February
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| 1984. Its <a href="../doc_stage/pam-d.htm">PAM-D</a> misfired, however, and the satellite
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| was stranded in a useless low orbit. It was retrieved by shuttle astronauts in November
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| 1984, and Hughes was contracted to refurbish it. <a href="westar-4.htm">Westar 6</a> was
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| eventually sold to the AsiaSat consortium and renamed <strong>AsiaSat 1</strong>. The spacecraft was
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| successfully relaunched on 7 April 1990, on board a <a href="../doc_lau_det/cz-3.htm">CZ-3</a>
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| rocket, and now provides telecommunications services to a number of Asian nations.</p>
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| <p>The <a href="../doc_sat/hs-376.htm">HS-376</a> series of spacecraft uses two
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| telescoping cylindrical solar panels and a folding antenna for compactness during launch.
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| Once the satellite is in synchronous orbit 22,300 miles above the equator, the antenna is
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| erected and the outer solar panel extended, more than doubling the spacecraft's height and
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| power output.</p>
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| <p>The spacecraft are 7.2 feet wide. They are 9 feet high in the stowed position, and with
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| the 6-foot wide antenna erect and the aft solar panel deployed, they stand 21.6 feet high.
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| Each weighs 1280 pounds at beginning of life in orbit. Stationkeeping is provided by four
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| thrusters using 313 pounds of hydrazine propellant. The K-7 solar cells generate 935 Watts
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| at beginning of life, and two nickel-cadmium batteries furnish full power during an
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| eclipse.</p>
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| <p>The satellites are stabilized by spinning at 50 rpm. Both the communications antenna
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| and electronics are despun with respect to the earth and achieve a pointing accuracy of
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| better than 0.05 degrees. In synchronous orbit, the satellite's velocity maintains it in a
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| fixed position relative to the earth, thereby ensuring continuity of communications
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| services.</p>
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| </div>
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| <div class="clearall"></div>
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| <table id="satdata" class="data">
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| <tr>
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| <th class="lhead">Nation:</th>
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| <td class="rcont" id="sdnat">Hong Kong → China</td>
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| </tr>
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| <tr>
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| <th class="lhead">Type / Application:</th>
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| <td class="rcont" id="sdtyp">Communication</td>
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| </tr>
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| <tr>
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| <th class="lhead">Operator:</th>
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| <td class="rcont" id="sdope">Asia Satellite Telecommunications Company</td>
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| </tr>
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| <tr>
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| <th class="lhead">Contractors:</th>
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| <td class="rcont" id="sdcon">Hughes</td>
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| </tr>
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| <tr>
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| <th class="lhead">Equipment:</th>
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| <td class="rcont" id="sdequ">24 C-band transponders</td>
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| </tr>
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| <tr>
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| <th class="lhead">Configuration:</th>
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| <td class="rcont" id="sdcnf"><a href="../doc_sat/hs-376.htm">HS-376</a></td>
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| </tr>
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| <tr>
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| <th class="lhead">Propulsion:</th>
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| <td class="rcont" id="sdpro"><a href="../doc_eng/star-30.htm">Star-30C</a></td>
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| </tr>
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| <tr>
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| <th class="lhead">Power:</th>
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| <td class="rcont" id="sdpow">Solar cells (body mounted and drop-skirt), batteries</td>
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| </tr>
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| <tr>
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| <th class="lhead">Lifetime:</th>
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| <td class="rcont" id="sdlif"></td>
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| </tr>
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| <tr>
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| <th class="lhead">Mass:</th>
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| <td class="rcont" id="sdmas">1244 kg (582 kg BOL)</td>
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| </tr>
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| <tr>
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| <th class="lhead">Orbit:</th>
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| <td class="rcont" id="sdorb">GEO</td>
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| </tr>
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| </table>
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|
|
| <table id="satlist" class="data">
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| <colgroup>
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| <col id="ld_sat">
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| <col id="ld_cos">
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| <col id="ld_dat">
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| <col id="ld_ls">
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| <col id="ld_suc">
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| <col id="ld_lau">
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| <col id="ld_rem">
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| </colgroup>
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| <tr>
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| <th>Satellite</th>
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| <th class="cosid">COSPAR</th>
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| <th>Date</th>
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| <th>LS</th>
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| <th></th>
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| <th>Launch Vehicle</th>
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| <th>Remarks</th>
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| </tr>
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| <tr>
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| <td>AsiaSat 1</td>
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| <td class="cosid">1990-030A</td>
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| <td>07.04.1990</td>
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| <td>Xi LC-3</td>
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| <td></td>
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| <td><a href="../doc_lau_det/cz-3.htm">CZ-3</a></td>
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| <td>relaunch of <a href="westar-4.htm">Westar 6</a></td>
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| </tr>
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| </table>
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| <div class="ref">
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| <h3>References:</h3>
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| <ul>
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| <li>Boeing Satellite Systems website</li>
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| </ul>
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| </div>
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|
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|
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| <div class="box">Further AsiaSat missions: <ul>
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| <li><a href="../doc_sdat/asiasat-1.htm">AsiaSat 1</a> [HS-376]</li>
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| <li><a href="../doc_sdat/asiasat-2.htm">AsiaSat 2</a> [AS-7000]</li>
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| <li><a href="../doc_sdat/asiasat-3.htm">AsiaSat 3, 3S</a> [HS-601HP]</li>
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| <li><a href="../doc_sdat/asiasat-4.htm">AsiaSat 4</a> [HS-601HP]</li>
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| <li><a href="../doc_sdat/asiasat-5.htm">AsiaSat 5, 7</a> [SSL-1300]</li>
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| <li><a href="../doc_sdat/asiasat-6.htm">AsiaSat 6</a> [SSL-1300]</li>
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| <li><a href="../doc_sdat/asiasat-8.htm">AsiaSat 8</a> [SSL-1300]</li>
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| <li><a href="../doc_sdat/asiasat-9.htm">AsiaSat 9</a> [SSL-1300]</li>
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| <li>AsiaSat 10</li>
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| <li><a href="../doc_sdat/gorizont.htm">AsiaSat G</a> [KAUR-3]</li>
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| </ul>
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| </div>
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