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.