See also
Finally picking up Selene in Stockholm http://www.svengrahn.pp.se/trackind/Selene/Selene.html
73 Trevor M5AKA
--- truckwiz [email protected] wrote:
Guy's That another problem we are working on (for the lunar x prize). how big of transmitter do we need to send data and high definition video back from the moon?
Thanks' Brian
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Edward Cole Sent: Saturday, November 24, 2007 6:08 PM To: [email protected] Subject: [amsat-bb] Fwd: Re: [Mw] Japanese Lunar Orbiter received.
For those speculating on what it will take to receive a signal from the Moon, check this message received on the "microwave reflector":
X-Original-To: [email protected] Delivered-To: [email protected] X-Originating-IP: [24.18.44.7] From: "Loren Moline WA7SKT" [email protected]
Rex,
As per Paul Marsh the frequency for the Chinese orbiter doppler beacon is 2234.533 +/- doppler.
Loren
Date: Thu, 22 Nov 2007 03:05:20 -0800 From: [email protected] To: [email protected] Subject: Re: [Mw] Japanese Lunar Orbiter received.
Loren Moline WA7SKT wrote:
Hello Friends,
For those interested I again tonight received a signal from the
newly launched Japanese Lunar Orbiter.
This was received with my newly built S-Band downconverter and
a 3 1/2 turn helix antenna.
Frequency drifted due to doppler from 2263.605Mhz to
2263.581MHz before it went around the other side. I later acquired it after it came back around. I have not yet established a period of
orbit.
This was a great way to test my downconverter.
Loren WA7SKT
Congratulations on the reception. Now you've got me interested.
Info I just looked up says frequencies are 2212, 2219, 2287, 8456. So do you think your 2263 was doppler shifted 2287? I wonder if the satellite doppler has much effect vs. the moon itself. Calculating the exact doppler must be quite a math exercise.
Are you still planning to try the 8 GHz frequency too? Or have you
already?
A wiki for the satellite says the period of the main satellite is 2 hrs.
For John, the links say it will be at the moon for about a year. At the end they intend to do a soft landing on the moon.
Here are some links I found tonight, (there are lots more.) Selene (Kaguya): http://en.wikipedia.org/wiki/SELENE http://www.selene.jaxa.jp/en/communication/com_faq_e.htm http://www.selene.jaxa.jp/index_e.htm transmitters & freqs described in this one: http://ivs.nict.go.jp/mirror/publications/gm2006/kawano/ http://www.aerospaceguide.net/spacecraft/selene.html http://www.lpi.usra.edu/meetings/lpsc2006/pdf/1233.pdf
Seems the Chinese also have a satellite, Chang'e, orbiting the moon too. http://en.wikipedia.org/wiki/Chang%27e_1
I couldn't find any information about downlink frequencies for the Chinese one. Does anyone know anything about that one. Some of the information seemed to say it would be playing Chinese music.
Microwave mailing list [email protected] http://www.valinet.com/mailman/listinfo/microwave
Microwave mailing list [email protected] http://www.valinet.com/mailman/listinfo/microwave
73, Ed - KL7UW ====================================== BP40IQ 50-MHz - 10-GHz www.kl7uw.com 144-EME: FT-847, mgf-1801, 4x-xpol-20, 185w DUBUS Magazine USA Rep [email protected] ======================================
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Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
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