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RE: SNAP-1



SNAP-1 is working OK, but we are still working on the software.  Due to the
short timescale for this mission (6 months from design to launch) we haven't
got any OBC software.  This means that we need to switch it on over Surrey
manually at this stage.

The downlink is 100mW at 2430MHz.  It is 38k4 BPSK.  With a 2.4M dish, the
signal is very good  most of the time however the attitude isn't properly
stabilised so there are large fluctuations.  Also, it is close to the
microwave oven and ISM band and therefore there is considerable interference
around here.

It will probably take another few months to get things into a state that
they are usable.  The power budget is very low given the small size of the
spacecraft (6kG).

I'll try and get some further information out as soon as I can although I'm
going to be tied up with the TiungSat-1 launch in 2 weeks time.

73,
Chris G7UPN

-----Original Message-----
From: Jean-Louis.RAULT@tcc.thomson-csf.com
[mailto:Jean-Louis.RAULT@tcc.thomson-csf.com]
Sent: 08 August 2000 14:32
To: amsat-bb@AMSAT.Org
Subject: [amsat-bb] SNAP-1


Any good news from SNAP-1 ?
I desesperatly listen from time to time around 2430 MHz when the sat passes
over Guilford, UK, but no result, except some tiny radar-like pulses (from
time to time).
According to the available keps, SNAP-1 seems to be  far away from TZINGHUA
now.

Cheers

Jean-Louis F6AGR
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