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<p>Since much of the technical savvy on GNU/Coding/Lunar & Open
research & related topics is represented here in the
ground-station group, I am forwarding this request for lunar
downlink help that came from the satellite builders at Harbin
Institute in China.</p>
<p>73 de Tom K3IO<br>
</p>
<div class="moz-forward-container">--------------------------------------------------------------------------------<br>
<br>
-------- Forwarded Message --------
<table class="moz-email-headers-table" cellspacing="0"
cellpadding="0" border="0">
<tbody>
<tr>
<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Subject:
</th>
<td>[Bod] FW: [Rmg] FW: DSLWP URGENT HELP NEEDED!</td>
</tr>
<tr>
<th valign="BASELINE" nowrap="nowrap" align="RIGHT">Date: </th>
<td>Tue, 22 May 2018 22:37:04 -0500</td>
</tr>
<tr>
<th valign="BASELINE" nowrap="nowrap" align="RIGHT">From: </th>
<td>Bill Tynan <a class="moz-txt-link-rfc2396E" href="mailto:billandmattie@windstream.net"><billandmattie@windstream.net></a></td>
</tr>
<tr>
<th valign="BASELINE" nowrap="nowrap" align="RIGHT">To: </th>
<td><a class="moz-txt-link-abbreviated" href="mailto:bod@amsat.org">bod@amsat.org</a></td>
</tr>
</tbody>
</table>
<span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"><o:p><br>
</o:p></span>
<div class="WordSection1">
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">From:</span></b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">
Al Ward <a class="moz-txt-link-rfc2396E" href="mailto:w5lua@sbcglobal.net"><w5lua@sbcglobal.net></a> <br>
<b>Sent:</b> Tuesday, May 22, 2018 6:55 AM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:ntms@yahoogroups.com">ntms@yahoogroups.com</a><br>
<b>Cc:</b> <a class="moz-txt-link-abbreviated" href="mailto:rmg@k5rmg.com">rmg@k5rmg.com</a><br>
<b>Subject:</b> [Rmg] FW: DSLWP URGENT HELP NEEDED!<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Hello
NTMS and RMG<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Help
needed<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">73<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Al
W5LUA<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:windowtext">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:windowtext">
Al Katz [<a href="mailto:alkatz@tcnj.edu"
moz-do-not-send="true">mailto:alkatz@tcnj.edu</a>] <br>
<b>Sent:</b> Monday, May 21, 2018 10:43 PM<br>
<b>To:</b> peter blair<br>
<b>Cc:</b> 'Al Ward'; Paul Andrews<br>
<b>Subject:</b> Fwd: DSLWP URGENT HELP NEEDED!<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p>Hi Peter,<o:p></o:p></p>
<p>Would you post on Moon.<o:p></o:p></p>
<p>73,<o:p></o:p></p>
<p>Al - K2UYH<o:p></o:p></p>
<div>
<p class="MsoNormal"><br>
<br>
-------- Forwarded Message -------- <o:p></o:p></p>
<table class="MsoNormalTable" cellspacing="0" cellpadding="0"
border="0">
<tbody>
<tr>
<td style="padding:0in 0in 0in 0in" valign="top"
nowrap="nowrap">
<p class="MsoNormal" style="text-align:right"
align="right"><b>Subject: <o:p></o:p></b></p>
</td>
<td style="padding:0in 0in 0in 0in">
<p class="MsoNormal">DSLWP URGENT HELP NEEDED!<o:p></o:p></p>
</td>
</tr>
<tr>
<td style="padding:0in 0in 0in 0in" valign="top"
nowrap="nowrap">
<p class="MsoNormal" style="text-align:right"
align="right"><b>Date: <o:p></o:p></b></p>
</td>
<td style="padding:0in 0in 0in 0in">
<p class="MsoNormal">Tue, 22 May 2018 08:59:14 +0800<o:p></o:p></p>
</td>
</tr>
<tr>
<td style="padding:0in 0in 0in 0in" valign="top"
nowrap="nowrap">
<p class="MsoNormal" style="text-align:right"
align="right"><b>From: <o:p></o:p></b></p>
</td>
<td style="padding:0in 0in 0in 0in">
<p class="MsoNormal">MingChuan Wei <a
href="mailto:bg2bhc@gmail.com"
moz-do-not-send="true"><bg2bhc@gmail.com></a><o:p></o:p></p>
</td>
</tr>
<tr>
<td style="padding:0in 0in 0in 0in" valign="top"
nowrap="nowrap">
<p class="MsoNormal" style="text-align:right"
align="right"><b>To: <o:p></o:p></b></p>
</td>
<td style="padding:0in 0in 0in 0in">
<p class="MsoNormal">Al Katz <a
href="mailto:alkatz@tcnj.edu"
moz-do-not-send="true"><alkatz@tcnj.edu></a><o:p></o:p></p>
</td>
</tr>
</tbody>
</table>
<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
<div>
<div>
<div>
<p class="MsoNormal">Dear Prof. Katz, <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Can you help to find amateurs in
the US to help to monitor DSLWP-A on 435.425 and
436.425 now? <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">We lost the contact of satellite A
on S band after a orbit adjustment. We just tried to
switch on UHF, but we don't know if it works or not.
The sat is just above South America.<o:p></o:p></p>
</div>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">If it works, 435.425 should be 500bps
GMSK and JT4 alternately. <span
style="font-family:"Arial",sans-serif;color:#222222;background:white">436.425
should be 250 bps GMSK. Both transmit once in 5
minutes.</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:#222222;background:white">Thank
you very much!</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-family:"Arial",sans-serif;color:#222222;background:white">Wei</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">2018-05-21 1:59 GMT+08:00 MingChuan
Wei <<a href="mailto:bg2bhc@gmail.com"
target="_blank" moz-do-not-send="true">bg2bhc@gmail.com</a>>:<o:p></o:p></p>
<div>
<p class="MsoNormal">Hi Al, <o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Thank you very much for putting
in the newsletter! <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Best Regards, <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="color:#888888"><o:p> </o:p></span></p>
</div>
<div>
<p class="MsoNormal"><span style="color:#888888">Wei<o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">2018-05-20 23:29 GMT+08:00
Al Katz <<a href="mailto:alkatz@tcnj.edu"
target="_blank" moz-do-not-send="true">alkatz@tcnj.edu</a>>:<o:p></o:p></p>
<div>
<div>
<p class="MsoNormal"
style="margin-bottom:12.0pt">Dear Wei,<br>
<br>
I wish you great success with your
satellite project. I will publicize in my
next EME Newsletter. If there is any news
if the next few weeks let me.<br>
<br>
Your project should be of interest to many
hams, particularly in the satellite
community.<br>
<br>
Thank you for informing me of your
project.<br>
<br>
73, Al - K2UYH<span
style="font-size:10.5pt;color:#888888"><br>
<br>
</span><span
class="gmail-m-2016192135171366594hoenzb"><span
style="color:#888888"><o:p></o:p></span></span></p>
<pre><span style="color:#888888">-- </span><o:p></o:p></pre>
<pre><span style="color:#888888">Dr. Allen Katz, Prof. E/CE TCNJ<o:p></o:p></span></pre>
<pre><span style="color:#888888">Tel 609-584-8424 Sum, Cell 609-947-3889 </span><o:p></o:p></pre>
<div>
<div>
<p class="MsoNormal"> <br>
<br>
On 5/19/2018 2:30 PM, MingChuan Wei
wrote:<o:p></o:p></p>
</div>
</div>
</div>
<div>
<div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt">Dear
Prof. Katz,</span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt"> </span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt">I am Wei
Mingchuan, a radio amateur BG2BHC
and a doctor candidate of Harbin
Institute of Technology, China.
We have an amateur radio club
BY2HIT and a student satellite
team here, and we have launched
two amateur satellites, LilacSat-1
and LilacSat-2.</span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><o:p> </o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt">Our
university is leading a lunar
formation flying satellite
mission, Discovering the Sky at
the Longest Wavelengths Pioneer,
for low frequency radio astronomy,
amateur radio and education. The
constellation consists of two 47
kg micro-satellites, and will be
launched into a lunar transfer
orbit UTC this Sunday evening, and
finally enter a 300 x 9000km lunar
elliptical orbit. </span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><o:p> </o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt">Onboard
each satellite, there are two
VHF/UHF SDR transceivers to
provide beacon, telemetry,
telecommand, digital image
downlink and a GMSK-JT4 repeater.
Onboard transmitting power is
about 2 W.</span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><o:p> </o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt">The first
launch window will open at about
21:30 May 20th UTC. The
transmitters will be activated
soon after separation. Satellite A
will transmit 500 baud GMSK with
1/4 turbo code on 435.425 MHz and
250 baud GMSK with 1/2 turbo code
and precoder on 436.425 MHz, and
satellite B will transmit 500 baud
GMSK with 1/4 turbo code on
435.400 MHz and 250 baud GMSK with
1/2 turbo code and precoder on
436.400 MHz, in every 5 minutes by
default. Each transmittion will
last about 16 seconds. Radio
amateurs in South America will
have the earliest chance to
receive the signals from the
satellites, then North America,
Oceania, Asia, Europe and Africa. </span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><o:p> </o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt">As the
satellites will be quite far awary
from earth, and the onboard
transmitting power is small, the
downlink is quite weak, similar to
EME. Could you help us to find
some radio amateurs who are
willing to help to receive the
downlink signals from the
satellites?</span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><o:p> </o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt">We will
prepare different QSL cards for
different flight phase for
amateurs successfully made QSO or
received telemetry. Awards will
also be given to the first 10
amateurs in each continent who
successfully decoded the signals
from the satellites, received the
most number of packets, or
received an image.</span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><o:p> </o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt">An open
source decoding software based on
GNU Radio to work with RTL-SDR and
USRP is provided. Not difficult to
change the grc files to support
other SDR receivers. A small proxy
software will send the decoded
data to a server for real-time
display.</span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><o:p> </o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt">Thank you
very much and fingers crossed for
a successful launch!</span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><o:p> </o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt">Best
Regards,</span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><o:p> </o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt">Wei
Mingchuan BG2BHC</span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><o:p> </o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt">Links:</span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt">IARU
frequency coordination page: <a
href="http://www.amsatuk.me.uk/iaru/finished_detail.php?serialnum=530"
target="_blank"
moz-do-not-send="true">http://www.amsatuk.me.uk/iaru/finished_detail.php?serialnum=530</a></span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt">Link
budgets: <a
href="http://lilacsat.hit.edu.cn/wp/?page_id=676"
target="_blank"
moz-do-not-send="true">http://lilacsat.hit.edu.cn/wp/?page_id=676</a></span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt">Decoder
(GNU Radio OOT module): <a
href="https://github.com/bg2bhc/gr-dslwp"
target="_blank"
moz-do-not-send="true">https://github.com/bg2bhc/gr-dslwp</a></span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt">Decoder
(Linux Live CD): <a
href="https://1drv.ms/u/s%21Av6J6WjI3UbMhHm8gwMr4Z_keqWH"
target="_blank"
moz-do-not-send="true">https://1drv.ms/u/s!Av6J6WjI3UbMhHm8gwMr4Z_keqWH</a></span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt">TLE: <a
href="http://lilacsat.hit.edu.cn/tle/dslwp.txt" target="_blank"
moz-do-not-send="true">http://lilacsat.hit.edu.cn/tle/dslwp.txt</a></span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt">DSLWP-A
Telemetry Display: <a
href="http://lilacsat.hit.edu.cn/dashboard/pages_en/telemetry-a.html"
target="_blank"
moz-do-not-send="true">http://lilacsat.hit.edu.cn/dashboard/pages_en/telemetry-a.html</a></span><o:p></o:p></p>
<p class="MsoNormal"
style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.5pt">DSLWP-B
Telemetry Display: <a
href="http://lilacsat.hit.edu.cn/dashboard/pages_en/telemetry-b.html"
target="_blank"
moz-do-not-send="true">http://lilacsat.hit.edu.cn/dashboard/pages_en/telemetry-b.html</a></span><o:p></o:p></p>
</div>
</blockquote>
<p><o:p> </o:p></p>
</div>
</div>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
</div>
</div>
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