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ISS/PCsat (No PCsat ops after dark PLEASE)



Please:  NO PCsat operations after dark!

Although PCsat has been working perfeclty while in full sun
which began on 24 Jan, this period ENDS on  5 Feb when PCsat
re-enters eclipses. (but only  3 days into an 8 day test period
with ISS)...

ALl it takes is too  many packets in a row while PCsat is in the
dark to cause a momentaty battery low voltage RESET and
its ALL OVER.  Once PCsat resets, even once, she is usually
non-recoverable until the next full sun winter period.  We wont
see her again until next Novermber!  So go gently and we
might see her for another 2 weeks...

So, please, NO OPERATIONS AFTER DARK VIA PCsat.

If you ever see PCSAT-1 callsign change back to W3ADO-1
then CEASE ALL TRANSMISSIONS and hopefully a command
station can attempt to recover it before it gets too dark and
cold.

That is why the only acceptible path is via WIDE, because
WIDE will only be supported while PCsat is in good health.

thanks
de WB4APR, Bob


>>> "RANSOM, KENNETH G. (JSC-OC) (BAR)"
<kenneth.g.ransom1@jsc.nasa.gov> 1/31/05 11:42:43 AM >>>
The International Space Station's amateur radio equipment is scheduled
to
temporarily change frequency to 145.825 simplex on Feb 2. The change
will
occur after the 12:54 UTC school contact with the Air Training Corps
in
Norfolk, England. This brief change will allow operators to take
advantage
of  the recent return of PCSAT to operational status and the orbital
dynamics between the two satellites being optimal for numerous relay
opportunities. It will also be a chance to test the ability of the
Kenwood
to interact with another satellite digital system since the previous
joint
test utilized the Phase 1 Ericsson radio. Several long mutual passes
are
expected during this brief operation between the two satellites.

As a reminder, Bob Bruninga has stipulated NO unattended operations to
minimize impact to the power budget on PCSAT and recommends the
following
path for attempting double hops. UNPROTO CQ VIA WIDE,WIDE. More info
about
PCSAT is available at www.ew.usna.edu/pcsat <www.ew.usna.edu/pcsat> .

The chance to try and digipeat through both systems is scheduled to
conclude
Feb 10 when ISS is scheduled to make the next school contact. After
that
contact, the radio will return to the default packet operating
frequency of
145.99 up and 145.80 down. 

Enjoy!

Kenneth - N5VHO
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