[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Re: Fwd: Re: [Mw] Japanese Lunar Orbiter received.



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: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On
Behalf Of Edward Cole
Sent: Saturday, November 24, 2007 6:08 PM
To: amsat-bb@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@echo.valinet.com
>Delivered-To: microwave@echo.valinet.com
>X-Originating-IP: [24.18.44.7]
>From: "Loren Moline  WA7SKT" <lmoline@hotmail.com>
>
>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: rexa@sonic.net
> > To: microwave@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
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'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@lists.valinet.com
> > http://www.valinet.com/mailman/listinfo/microwave
>_______________________________________________
>Microwave mailing list
>microwave@lists.valinet.com
>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 dubususa@hotmail.com
====================================== 

_______________________________________________
Sent via AMSAT-BB@amsat.org. 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

_______________________________________________
Sent via AMSAT-BB@amsat.org. 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



AMSAT Top AMSAT Home