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 > > _______________________________________________ > 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
