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Update On Cute 1.7 Telemetry



Just completed a high elevation pass on the West Coast USA. Very nice
signals using just a ground plane and antenna mounted LNA. Acquisition is
running about 2 minutes earlier than current keps indicates.

Kazuya Konoue, with the CUTE 1.7 team, has sent me clarifications on the
telemetry data, prefaced by the comment that from the telemetry data, there
appears to problem with an on board computer. So instead of putting the
current telemetry "6782000A00000032" in the "house keeping" window on the
software, it should be placed in the "Satellite_PDA" window. When you do
that you will get the following:

Cute-1.7 + APD Satellite & PDA Status
UTC : 2006/02/22 02:01:28:140
LocalTime : 2006/02/21 18:01:28:140

FM is not transmitting
FM protocol is GMSK 9600bps Ax.25
FM mode is realtime 2 frames mode
Service mode is disable
The number of pictures are 0
Antenna is not deplyed
USB2Serial power is turned on
Magnet sensor power is turned off
APD 3.3V A power is turned off
APD 3.3V B power is turned off
APD main power is turned off
Camera power is turned off
ASM power is turned on
CW TX power is turned on
Amateur service RX power is turned on
FM TX power is turned on
FM packet frame number is 0
FM packet interval(sec) is 5

WDT status is disable
PDA number is 1
On board time is not synchronized
USB2Serial status is enable
Camera status is enable
Log file freq(sec) is 1
Log file mode is no access
TLE is not uplinked
Torquer control is disable
APD status is disable
APD sample freq(sec) is 5
APD file mode is no access
tether is disable
Image format is Windows bitmap
Sun sensor 1 is inactive
Sun sensor 2 is inactive
Sun sensor 3 is inactive
Sun sensor 4 is inactive
Sun sensor 5 is inactive

I measured the tumble rate at approximately 20 seconds.

While there doesn't seem to be a lot of chatter on this satellite, it should
be noted that it will have a 1268.5 MHz packet uplink capability and only
about a year of orbit time.

One of the interesting experiments on board is an "electro-dynamic" drag
experiment which is designed to de-orbit the satellite sooner than it would
without the experiment.

Also look at the perigee and apogee. It's rather ellipical with about 290km
perigee and about 750km apogee. Should make for some interesting signal
levels especially when the L band packet system is turned on.

Regards...Bill - N6GHz
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