Shift A6, 7/27/99 20:19 EDT to 7/28/99 09:19 EDT


SOT Lead        WAP
Spac/Aspect     RAC
FOT/Sci liason  EM
HRC             AK, RK
ACIS            PP,MB,RG,GG,etc.


ACTIVITY PLAN

Complete ACIS Raw Data collection test, each CCD, 61054_RAW_DATA

Perform ACIS OBF Integrity Test, 61053_OBF_INTG

Start ACIS Dark Current Measurement Test, 61052_DARK_CUR

Perform Vacuum measurement, SOP 6M002

Re-acquire all 4 FID lights using SAP 6A024, CAP91A

Perform SSR Dump (CAP 68A)

ANALYSIS Activities

ACA Alignment evaluation

EVENTS (all times approximate)

209:01:30 Complete ACIS Raw Data collection test, each CCD, 61054_RAW_DATA
                        (OBSID's 62795, 62794, 62793 and 62792)

209:02:30 - 209:03:00 Commanding problems, recycle PTP to improve

209:03:10 - 209:03:22 Ground station swap, Madrid to Goldstone.

209:03:30 Start ACIS OBF Integrity Test, 61053_OBF_INTG
                       (OBSID's 62791, 62790, 62789 and 62788)

209:04:28 Loss of comm

209:04:38 Start SSR Dump

209:05:10 Apogee #5

209:05:30 Complete ACIS OBF Integrity Test (IT IS THERE!)

209:05:50 Start ACIS Dark Current Measurement, 61052_DARK_CUR
                   OPSID      FP Temp
                   62787           -90C
                   62786           -90C
                   62785           -90C
                   62784           -90C

209:06:09 Ran CAP 91A which runs SAP 6A024 to re-acquire FID lights, VCDU 1616900
209:06:10 FLCA Reset, VCDU 1617600
209:06:13 PEA full field search, 4 FIDS and 4 MON windows found, VCDU 1617900
209:06:15 Establish 8x8 windows, VCDU 1618360
                  (Total time of 6 minutes for script)

209:06:22 Turn on Vacuum monitor

209:08:00 Do 167 deg yaw maneuver to prepare for Earth scan

209:09:20 Telemetry paused on coot due to attempt to read 70 MByte file into emacs
                    Resumed after 2 minutes.

209:10:00 Continue ACIS Dark Current Measurement, 61052_DARK_CUR
                   OPSID      FP Temp
                   62783           -110C
                   62782           -110C
                   62781           -110C
                   62780           -110C

209:11:23 Vacuum monitor off

209:12:16 ACIS Dark current over at -110C (Safe for rad belt passage)

209:12:35 Set ACIS FP temp to -120C

209:12:36 Run CAP 70 Step 1 to disable RADMON (after ACIS finishes measurement)
                     (run CAP 70 after radiation belt to ENABLE RADMON)

 

NOTES/ISSUES/PROBLEMS

Lack of either DAT or JAZ drive on unagi is impeding ACA & S/C analysis work.

It was determined that the on-line ephermis information used by mission planning,
PCAD and CCDM for shift A6 was incorrect by 1.5 hrs. The cause appears to be
the use of the wrong day as input to the Satellite Tool Kit (STK) orbit analysis
program.  This was corrected by Flight systems.

Received a revised Transfer Orbit Timeline for review. Distributed to SOT, ACIS, HRC,
ACA groups.

NOTE: PCAD will execute pitch maneuvers which should be watched closely for stray light
             levels.
                        Time                          Pitch
                 209:14:10                  Beta = -45, pitch = 135 deg (SUN away from HRMA)
                 209:15:50                  Beta = +45, pitch = 45 deg (SUN towards HRMA)
                 209:18:40                  Beta = +55, pitch = +35 deg (SUN towards HRMA)
                 209:21:00                  Beta = +45, pitch = 45 deg
                 209:21:37                  Beta = 0, Normal SUN mode

Did not run CAP 93 this orbit (not needed since all HRC HV now OFF per HRC team).