[amsat-bb] Re: CP-4 Apr 22, 2007 pt.2
kmccabe at calpoly.edu
Sun Apr 22 15:55:18 PDT 2007
On Apr 22, 2007, at 3:14 PM, Mike Rupprecht wrote:
> Is anybody there who can explain the telemetry ?
Apologies for being slow, I've been very busy these past few days and
haven't had much of a chance to look at incoming telemetry reports.
Regarding the telemetry you've been decoding, there seems to be a
slight problem; the big packets are missing a few bytes (and seem to
be missing different ones, from the different sizes you're getting).
That packet should be 115 bytes (99 payload + 16 AX.25 header). I've
been trying to decode them "by hand" but it's been a slow process so
far. Any chance you have audio recordings of some of these beacons?
A meager explanation of the CP4 telemetry can be found here: http://
polysat.calpoly.edu/CP2_ops.php , though it's still missing some
information (conversion specifiers for byte readings into real values).
Regardless, thanks for all the beacons! You've gotten more than we
Keith McCabe, KI6CWF
PolySat, Cal Poly, SLO
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