Hi Stefan VE4NSA, Peter DB2OS and folks on BB
It should be very nice to have a transponder on the Lunar Lander operating into
the X/K band 10,5 GHz Uplink and 24 GHz downlink. As on AO40 the antennas are
very small and probably there is room for a transponder.
For a good feasibility and assesment with ESA it would be very important to
have also a 24 GHz Beacon relaying to us TLM data concerning some primary ESA
experiments.
Just my idea.
73" de
i8CVS Domenico
----- Original Message -----
From: Stefan Wagener
To: i8cvs
Cc: Peter Guelzow ; Amsat - BBs
Sent: Monday, June 04, 2012 9:26 AM
Subject: Re: [amsat-bb] Re: European Lunar Lander - Call for Declarations
Thanks folks,
That's a very helpful and constructive discussion. It will certainly allow
for better assessment of the feasibility, options and limitations.
Stefan, VE4NSA
On Sat, Jun 2, 2012 at 8:54 PM, i8cvs <domenico.i8...@tin.it> wrote:
Hi Peter, DB2OS
I was reading the document in particular point 2.2.2
Communication and 2.2.3 but in my opinion the Radio
Hams are off side because everyting has been already
designed and in my opinion there is no room available
on the Lander for a Moon-Earth experimental communication
transponder in our L band and S band because our antennas
are too big.
Since the main 7.2 and 8.5 GHz X band High Gain Antennas
of the Lander are oriented toward the Earth in a fixed position
to compensate the pointing for libration probably only a 5 watt
pep and a circularly polarized horn on our 10.5 GHz should be
possible.
73" de
i8CVS Domenico
----- Original Message -----
From: "Peter Guelzow" <peter.guel...@kourou.de>
To: <amsat-bb@amsat.org>
Sent: Sunday, June 03, 2012 12:57 AM
Subject: [amsat-bb] Re: European Lunar Lander - Call for Declarations
Hi together,
Please also have a look at this document:
http://wsn.spaceflight.esa.int/docs/lunarlander/LunarLander_EIDA_CDI_230512.
pdf
in particular see point 2.2.2 Communication and 2.2.3:
"Visibility of the Earth from the landing site imposes the following
constraint:
• communications shall only be possible within a 13.7 day (TBC) window
each month, and shall depend on the availability of the ground station."
further:
"the mean power available for an individual payload is expected not to
exceed 20W"
73s Peter DB2OS
On 03.06.2012 00:29, Peter Guelzow wrote:
> Check also this discussion from James Miller, G3RUH:
>
> http://www.amsat.org/amsat/articles/g3ruh/110.html
>
>
> 73s Peter, DB2OS
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