[amsat-bb] Please keep an ear open for a phoenix!
g.shirville at btinternet.com
Fri Jan 23 15:32:44 PST 2009
With the successful launch today of the new cubesats - congratulations to
the teams involved - there is just a very small chance of also hearing
signals from XO53 - SSETI Express!
SSETI Express was launched in November 2005 but, due to a failure within the
power supply system on board, signals were only heard for a few hours.
Investigations made after the launch indicate that it is just possible that
the offending short circuit FET devices may, one day, go open circuit. This
would allow power from the solar panels to again reach the electronics. It
can be assumed that the batteries are pretty useless by now so it would only
be likely to operate when in sunlight.
SSETI Express was on 427.250MHz - the same frequency as is now being used by
PRISM and this is a request that, if by any chance you hear any strange
noises on the frequency to please let me know! In this context, "strange
noises" could be either short bursts of 9k6 data or even some very unusual
"CW like" signals.
Similar things have happened in the past!
PS - just in case...here is a more technical description of what might be
- a sub 1 second burst of AX25 telemetry every 18 seconds.
- simple on/off telemetry comprising 16 x 100msec carrier pulses. Either
every 30 seconds or every 2 mins
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