Alan P. Biddle schrieb:
All,
A reminder that if you have been putting off working through the ARISSat-1
repeater, receiving SSTV pictures, or submitting telemetry, the next few
weeks will be your last opportunity to be a part of this satellite's
history. Since deployment in August, ARISSat-1 has descended about 60 km,
and is currently losing more than 1.5 km per day. The rapid rate is
partially the result of the recent solar activity on the atmosphere,
significantly increasing the drag. The predictions by several individuals
and groups are all converging toward a reentry in January or February, 2012.
Heating will become significant before then. Remember, good telemetry in
this period provides invaluable information to the engineering team, to be
used in future projects.
The orbit period changes about 30 seconds per day, and that will increase
steadily. Be certain to update your tracking program Keps from Space-Track
or CelesTrak before each pass. They issue revised versions 3-5 times daily.
As the descent continues, this will become even more critical to copying the
telemetry beacon, especially unattended.
73s,
Alan
WA4SCA
Hello All
With the program SatEvo by Alan Pickup I calculated the re-entry date
December 27 2011 with Kepler data
RADIOSCAF-B (KEDR)
1 37772U 98067CK 11331.09098689 .00238223 00000-0 11065-2 0 3555
2 37772 051.6354 054.9663 0005738 050.5984 016.1987 15.82161046 18004
I also calculated an apogee hight of 328 km and a perigee hight of
320 km.
--
Mit freundlichen Grüssen, Regards, 73
Thomas Frey, HB9SKA
______________________________________________________________________
Thomas Frey, Holzgasse 2, CH-5242 Birr, Tel. + Fax: 056 444 93 41
http://home.datacomm.ch/th.frey/
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