karn@mouton.UUCP (10/19/84)
**** UoSAT Bulletin-97 (Edited) 19th October 1984 ****
UoSAT Spacecraft Control Centre, University of Surrey
** UoSAT-Oscar-9 Schedule **
This weeks schedule is as follows:
Friday - load Bulletin
Saturday - Bulletin/DIGITALKER/1200 bps telemetry
Sunday - Bulletin/DIGITALKER/1200 bps telemetry
Monday - Bulletin/DIGITALKER/1200 bps telemetry
Tuesday - CCD Camera - next week Radiation data
Wednesday - Whole orbit telemetry survey
Thursday - Computer check-summed telemetry
The 21 MHz Beacon will be in use this week.
** UoSAT-Oscar-11 Operations **
* Telemetry Channel No.13 *
The Telemetry Channel 13, which has previously been labelled as
'spare', has now been named and calibrated as:
13 435 MHz Downlink Transmitter VCO Control Voltage
(V = N/20)
This channel was kept free right up until final s/c checkout
just in case there were any last minute demands, but none arose
and it was allocated to the default - monitoring the 435 MHz
transmitter VCO control voltage. Stored telemetry from the OBC
has enabled us to confirm the allocation and its calibration.
* The 435 MHz downlink is functioning well with an output rf
power of 1 watt, consuming 225 mA from the +14v unregulated
bus.
* Experiments continue with the 9600 bps nrzi psk data on the
435 MHz downlink in preparation for DCE, CCD & Particle/Wave
Experiments. The tests this week focussed on calibration of
the modulation index and evaluation of a i.f.
demodulator/decoder. The preliminary results look very
encouraging, but more work needs still to be done before we
feel happy about releasing all the details - we don't want to
send you all on wild goose chases!
* Particle/Wave Experiments - UO-11 and the AMPTE spacecraft
will be in conjunction for a couple of weeks around the
beginning of November allowing the simultaneous measurement of
P/W interactions with UO-11 and UKS. Preliminary tests were
carried out on Monday 081084 to evaluate the P/W experiment and
later analysis has shown it to have been most successful.
These conjunctions occur only once every six months so we must
get going! More details will be given soon.
* The spacecraft Z-spin rate continues to increase slowly of
its own accord, due to cross-coupling of the libration energy
into rotational energy, and de-spin manoeuvres have continued
this week to keep the Z-spin rate slower than about 2 minutes
per revolution - it seems that we need to despin about once
every 5 days -
A daily account of UO-11 operations follows:
DAY ORBIT CHANNELS RESET TIME
*** ***** ******** **********
Saturday whole orbit data & telemetry
Sunday 3310 1,2,3,52 08:54:47
(OBC told to change d/link from ODATA to TLM after 9.5hrs)
Monday 3325 13,45,46,47,52 09:29:28
435 MHz d/l 9600 bps psk test
3226 Despin to 2 min 18 sec
3327 back to ODATA dump
(OBC told to change d/link from ODATA to TLM after 8.5hrs)
Tuesday 3339 DSR data test
3238 DSR 9600 bps test on 435 MHz
3342 1,2,3,52 13:23:29
(OBC told to change d/link from ODATA to TLM after 7.5hrs)
3346 Watch-Dog test.
3347 Watch-Dog reset (21:18)
d/l back to ODATA
(OBC told to change d/link from ODATA to TLM after 6hrs)
Wednesday 3354 DSR test initialisation sequence.
3355 DSR 9600 bps data test on 435 MHz
3356 DSR 9600 bps data test on 435 MHz
1,2,3,52 12:29:20
(OBC told to change d/link from ODATA to TLM after 8.5hrs)
Thursday 3369 despin to 3 mins
3370 DSR 9600 bps data test on 435 MHz
1,2,3,52 11:31:40
(OBC told to change d/link from ODATA to TLM after 9.5hrs)
Friday 3383 DSR 9600 bps nrzi psk tests
3384 despin to 4.7 min
DSR 9600 bps nrzi psk tests
3385 DSR 9600 bps nrzi psk tests
channel 2 only 12:09:00
(will collect z-field data
for 36 hrs, monitoring GG lock)
** Thanks for Reports & Questionnaire Returns **
G8VGQ, H.J.Meerza, GM4KZO (tnx for graphs), JE3MXU, DL7OU
This week: DL7OU, W7AVE, V3CE, HB9RKR,
** Messages **
W7AVE DE G3YJO - Many thanks for the hard copy of the UO-9
image, we are looking for the location of 301183 image data.
HB9RKR DE G3YJO - Thanks for the postcard and look forward to
receiving the CCD hard copy.