[amsat-bb] Re: DELFI-C3 over Japan 11:27UTC

Bruce Robertson ve9qrp at gmail.com
Thu May 8 08:20:15 PDT 2008

Hello, Sanada-san --

Delfi has no batteries on board; it works entirely from its solar
panels. It appears that at present it sometimes gets in an attitude,
or position, where its panels do not generate sufficient voltage (or
current?) and it shuts down. In addition, sometimes the audio quality
of the BPSK transmission degrades; I've assumed that this is a related

Often, it will restart half a minute later, so keep listening to the pass.

I believe that this is a problem the control team understands and is
going to try to address, but naturally they are being very cautious.

A longer pass helps a great deal with getting used to tuning the
signal. Start by tuning for the strongest signal on your s-meter, then
tweak it from there. Don't keep moving the tuning around, because
RASCAL needs some time to get a lock.

73, Bruce

On Thu, May 8, 2008 at 8:39 AM, ji1izr/Masahiro SANADA
<ji1izr at jamsat.or.jp> wrote:
> Hello, everyone,
> I watched DEFLI-C3 just now,
>  listen to it and try to decode with RASCAL.
> During this pass,
>  the sound suddenly went out about 11:27UTC.
> The LOS was about 11:32UTC.
> I could not decode any data.
> What happened?
> Masahiro SANADA
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