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<table width="100%" border="0" cellspacing="0" cellpadding="0" style="box-sizing:border-box;color:rgb(0,0,0);font-family:Verdana,Arial,Helvetica,sans-serif;font-size:medium;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial"><tbody style="box-sizing:border-box"><tr style="box-sizing:border-box"><td style="box-sizing:border-box"><div id="gmail-story" style="box-sizing:border-box;width:618.667px;font-size:16px;height:auto;float:left"><h1 style="box-sizing:border-box;font-size:16pt">China's DSLWP-A1/A2 satellites to transmit Amateur Radio data from the Moon</h1><p style="box-sizing:border-box">China is planning to launch the<span> </span><strong style="box-sizing:border-box">Chang’e 4</strong><span> </span>lander and rover which is slated to land on the far side of the moon in December. The lander configuration will use a relay satellite for a control and data link with Earth.</p><p style="box-sizing:border-box">Also aboard this flight will be a pair of microsatellites,<span> </span><strong style="box-sizing:border-box">DSLWP-A1</strong><span> </span>and<span> </span><strong style="box-sizing:border-box">DSLWP-A2</strong>, which will test low-frequency radio astronomy and space-based interferometry. These two lunar orbiting satellites developed by students at the Harbin Institute of Technology will include educational and amateur radio payloads (but not a transponder).</p><p style="box-sizing:border-box">The Amateur Radio payload on DSLWP-A1 will provide a telecommand uplink and a telemetry and digital image downlink. Radio amateurs will be able to transmit commands that allow them to send commands to take and download an image.</p><p style="box-sizing:border-box">The IARU has coordinated downlinks on 435.425 MHz and 436.425 MHz for A1.<br style="box-sizing:border-box">Downlinks have been coordinated for A2 are 435.400 MHz and 436.400 MHz using 10K0F1DCN or 10K0F1DEN (10-kHz wide FM single-channel data) 250 bps GMSK with concatenated codes or JT65B.</p><p style="box-sizing:border-box">A1 and A2 will be deployed into a 200 × 9,000 kilometer lunar orbit. The 50 × 50 × 40 centimeter spacecrafts each weigh about 45 kilograms and are three-axis stabilized. Two linear polarization antennas are mounted along and normal to the flight direction.<br style="box-sizing:border-box">The satellites will use the moon to shield them from radio emissions from Earth for the long wavelength space-based interferometry experiments.</p><p style="box-sizing:border-box">The launch is anticipated for May or June on a CZ-4C vehicle, putting the satellites’ deployment about 6 months ahead of the launch of the Chang’e 4 lander and rover.</p><p style="box-sizing:border-box"><font size="1" style="box-sizing:border-box">Sources: The Harbin Institute of Technology, IARU, ARRL and ANS</font></p></div></td></tr></tbody></table>
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