<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<font size="+1"><font face="Comic Sans MS">Those sites will take a
while to digest, globs of information. <br>
A Nova series program aired on Public Television titled
"Einstein's Quantum Riddle". In the program they describe a
Chinese satellite laser communications </font></font><font
size="+1"><font face="Comic Sans MS"><font size="+1"><font
face="Comic Sans MS">system </font></font>using quantum
encryption. Could this be detected if used to communicate with
the moon lander?<br>
<br>
<br>
Jacek Radzikowski wrote on 1/11/2019 1:27 AM:
<blockquote type="cite">
<meta http-equiv="content-type" content="text/html;
charset=UTF-8">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div dir="ltr">
<div class="gmail_default"
style="font-family:tahoma,sans-serif">There is a
satellite orbiting around L2 point (second
Lagrangian point - point outside of Moon's orbit,
where gravitational and circular motion forces allow
an object placed there to be locked to the Moon's
motion), which acts as a relay between Earth and the
lander: <a
href="https://en.wikipedia.org/wiki/Chang%27e_4#Queqiao_relay_satellite">https://en.wikipedia.org/wiki/Chang%27e_4#Queqiao_relay_satellite</a></div>
<div class="gmail_default"
style="font-family:tahoma,sans-serif">The mission
was very closely monitored by a group of radio
operators and astronomers, who were calculating the
space probe's orbital parameters using observations
of Doppler frequency shifts in transmissions from
the satellite: <a
href="https://skyriddles.wordpress.com/2019/01/07/change-4-lunar-orbit-a-postmortem/">https://skyriddles.wordpress.com/2019/01/07/change-4-lunar-orbit-a-postmortem/</a></div>
<div class="gmail_default"
style="font-family:tahoma,sans-serif">Similar
technique was used last year to identify IMAGE
satellite, which NASA declared dead after system
failure in 2005: <a
href="https://skyriddles.wordpress.com/2018/01/21/nasas-long-dead-image-satellite-is-alive/">https://skyriddles.wordpress.com/2018/01/21/nasas-long-dead-image-satellite-is-alive/</a></div>
<div class="gmail_default"
style="font-family:tahoma,sans-serif"><br>
</div>
<div class="gmail_default"
style="font-family:tahoma,sans-serif">Jacek</div>
<div class="gmail_default"
style="font-family:tahoma,sans-serif">kw4ep</div>
<div class="gmail_default"
style="font-family:tahoma,sans-serif"><br>
</div>
<div class="gmail_default"
style="font-family:tahoma,sans-serif"><br>
</div>
</div>
</div>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr">On Fri, Jan 11, 2019 at 1:03 AM Alex Fraser
<<a href="mailto:beatnic@comcast.net">beatnic@comcast.net</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF"> <font face="Comic Sans MS"
size="+2">There is some discussion in this Wikipedia
article of the communications system used with the
Chinese moon lander. I was wondering if the had a
world wide tracking system. <br>
I would assume they have a relay satellite orbiting
the moon as it landed on the back side. <br>
</font><br>
<font face="Comic Sans MS" size="+2">It's an interesting
read</font><br>
<font face="Comic Sans MS" size="+2"><a
class="gmail-m_-6572577031295635334moz-txt-link-freetext"
href="https://en.wikipedia.org/wiki/Chinese_Lunar_Exploration_Program"
target="_blank">https://en.wikipedia.org/wiki/Chinese_Lunar_Exploration_Program</a></font><br>
<pre wrap="">--
</pre>
</div>
</blockquote>
</div>
</blockquote>
<br>
<br>
</font></font>
<pre class="moz-signature" cols="72">--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
No electrons were harmed in the creation of this message
--------------------------------------------------------
~~~******************* Alex Fraser *******************~~~
--------------------------------------------------------
[[[[[[~~^^^#___=>>>```/\/\**O**/\/\```<<<=___#^^^~~]]]]]]
</pre>
</body>
</html>