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sunsat update



SUNSAT UPDATE
3 MARCH 1999


SUNSAT ONE WEEK IN SPACE

SUNSAT has  spent one week in space and going strong. Yesterday the
Ground Control Team  at Stellenbosch  managed to access the satellite
during  daytime passes. Good signals were received without the pre-amp
in circuit. May be the African Sun is too much for the low noise devices
in the ground station pre-amp?

Last night the power amp failed and the ground station had to rely on 8w
to the antenna some six floor up from the command station. The team also
successfully tested the UHF telecommand link.

Tonight the detumbling and de-libration process will start.

“We are also doing some computer diary based tests to confirm that the
hardware time-outs on the vhf transmitter(s) work. This will give us
confidence to switch the VHF transmitter on without fear of permanently
locking up the VHF receiver.  Also we want to start the diary commanding
the VHF and UHF transmitters to go on a low duty cycle permanent
transmission to give us a beacon.” Garth Milne ZR1AFH said.

The power system is working well and the battery seems to get to full
charge after about 35 minutes in sun, and then spend the remaining 20
minutes on trickle.

Cliff K7RR has provided the following elements:

SUNSAT

1 25636U 99008C   99061.56347005 -.00007770  00000-0 -21076-2 0    85

2 25636  96.4755  14.8137 0152125 230.7009 128.0570 14.40854701  1010



Hans ZS5AKV

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