[amsat-bb] Re: ARISSAT-1 >> Why not launch it now?

[Alan P. Biddle]

Burns,

The TM-D700 used the cross band repeater function to listen to the ARISSat 2
meter FM voice, and then rebroadcast it on 70 cm.  It was reported to have
been used to check the first short test.  I do stuff like that in the home
shack, even using dummy loads, but then I don't live in a metal can.  ;)  I
do not know exactly how this was lashed up to give a definitive answer.

Alan
WA4SCA



-----Original Message-----
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
Behalf Of Burns Fisher
Sent: Sunday, April 17, 2011 1:34 PM
To: AMSAT BB
Subject: [amsat-bb] Re: ARISSAT-1 >> Why not launch it now?

According to the ARISSAT-1 critical design review, the battery is
mission-critical for the first 15 minutes.  I assume it has to run the
15-minute timer that delays that start of operation until the bird is some
distance from the 'nauts.  Based on that info, I would guess it is not
viable to launch ARISSAT-1 with a non-operational battery.

Do they have a spare?  Depends what you mean.  Since it is the same battery
that powers the Russian space suits, there are likely some on board.  Is
that a suit batter that could be used in the satellite?  That's a different
question.  Important as it is to us, I imagine that ARISSAT-1 is not all
that important to the ISS partners.

So now I have a question for Tony or others in on the technical details:
 How was the 70cm transmission from this Yuri's day test supposed to work?
Is there an audio output from the ARISSAT-1 to plug into the station's
xmitter?  Or was the station planning to pick up the 2m transmission and
re-broadcast on 70cm? (I'm guessing the latter, which implies that there was
probably not even a very weak 2m signal that the ISS receiver right next
door could pick up.)

Burns, W2BFJ

On Sat, Apr 16, 2011 at 10:45 PM, Dave Taylor <dave.w8aas at verizon.net>wrote:

> Because it is not NASA's satellite.  It is up to the Russians to
> deploy, and their next scheduled EVA is in July.
>
> -- Dave, W8AAS
>
>
> On Apr 16, 2011, at 12:27 PM, AB9RN wrote:
>
> > Curious why NASA is delaying such a long time to hand launch the
> > satellite
> > until July? I would think they would want to get it out of there and
> > de-clutter the ISS. Given that it appears to be dead without a solar
> > panel
> > functioning, it seems like an obvious idea to me. Is there some
> > reason why
> > they can't schedule this sooner?
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