[amsat-bb] Re: Spanish cubesat

Bill Ress bill at hsmicrowave.com
Mon Jun 16 11:42:39 PDT 2008

I'm excited to see that you and your organization are soliciting input 
from the AMSAT community for your SpanishSat. I'm sure that AMSAT 
members will offer their input and suggestions. There is a lot of talent 
on this reflector along with much archival history and experiences which 
can be most helpful.

Besides offering my desire to have you include a transponder (any kind 
you can fit in!), I would suggest you learn as much as you can about 
solar cell/battery management. In this years CalPoly CubeSat conference, 
it was noted that many CubeSat failures, once is orbit, are attributed 
to power/battery management issues. If you haven't already looked over 
the conference papers, I'd suggest a visit to:


and they will give you some insights into what has been experienced in 
recent CubeSats along with people you can contact for more information.

Best of luck on your project. We'll be watching your progress and I do 
hope to see you on this reflector with any questions.

Regards...Bill - N6GHz

rct at uvigo.es wrote:
> Dear colleagues,
> The Telecommunication School at Vigo University, Spain, is developing
> a cubesat that will be launched by ESA. It will transmit in amateur
> bands, and the University radioclub (EA1RCT) is collaborating in the
> project. The design is not yet closed and we can send proposals to the
> development team. The radioclub is willing to hear ideas from the
> amateur radio comunity: we would like to have a short list ready by
> next Thursday, June 26, so any proposal we receive before then will be
> carefully read.
> The satellite will be small and lightweight as you know, and it will
> run on a short electrical budget. Moreover, the time schedule is very
> tight. One of the main objectives is to test SDR systems in space (not
> necessarily in amateur bands).
> Neither the bands, power o full-duplex capability have been
> established. It could eventually end up with just a telemetry beacon.
> We would like to hear your opinions about what the amateur radio
> community would prefer to carry on board, in these three scenarios:
> · full-duplex communication capability (linear transponder, fm rep, etc)
> · half-duplex systems (digipeater?)
> · beacon modes (afsk, psk, cw)
> Best regards,
> EA1RCT RadioClub Telecomunicaciones Vigo
> http://lostrego.uvigo.es
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