[amsat-bb] Re: Fwd: Re: [Mw] Japanese Lunar Orbiter received.
truckwiz at bwig.net
Sat Nov 24 16:48:45 PST 2007
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
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
Behalf Of Edward Cole
Sent: Saturday, November 24, 2007 6:08 PM
To: amsat-bb at amsat.org
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: microwave at echo.valinet.com
>Delivered-To: microwave at echo.valinet.com
>From: "Loren Moline WA7SKT" <lmoline at hotmail.com>
>As per Paul Marsh the frequency for the Chinese orbiter doppler
>beacon is 2234.533 +/- doppler.
> > Date: Thu, 22 Nov 2007 03:05:20 -0800
> > From: rexa at sonic.net
> > To: microwave at echo.valinet.com
> > 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
> > >
> > > 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
> > 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'e_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
> > microwave at lists.valinet.com
> > http://www.valinet.com/mailman/listinfo/microwave
>Microwave mailing list
>microwave at lists.valinet.com
Ed - KL7UW
BP40IQ 50-MHz - 10-GHz www.kl7uw.com
144-EME: FT-847, mgf-1801, 4x-xpol-20, 185w
DUBUS Magazine USA Rep dubususa at hotmail.com
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