NASA Hubble Space Telescope Daily Report # 3649

HUBBLE SPACE TELESCOPE

DAILY REPORT # 3649

PERIOD COVERED: DOY 189

OBSERVATIONS SCHEDULED – No programs executed due to safemode entry.
Intercept Science SMS expected @ 190/22:00Z.

FLIGHT OPERATIONS SUMMARY:

Significant Spacecraft Anomalies: (The following are preliminary
reports of potential non-nominal performance that will be
investigated.)

HSTAR 9472: Main Baffle 6 Temperature (EMNBF6T) flagged OOL red high
at -13.987 ¬?C for one sample @ 189/09:28:35Z. Back in bounds @
189/09:29:05Z. Under investigation.

COMPLETED OPS REQs:

17215-3 – ZGSP Recovery – Rate Gyro Reconfiguration @ 189/1455z

17216-0 – ZGSP Recovery – Coarse Attitude Determination @ 189/1537z

FRS SAC Special Request # 3; ARU U/L @ 189/1620z

17213-0 – Open +DD SPA Trim Relay @ 189/1752z

17220-0 – Enable Magnetic Field Model Preview Mode @ 189/1755z

17219-1 – Clear SI (ACS & STIS) Engineering Data Reports @ 189/1757z

17222-0 – Fine Attitude Determination & Bias Calculation @ 189/1906z

17222-0 – Fine Attitude Determination & Bias Calculation @ 189/2228z

17222-0 – Fine Attitude Determination & Bias Calculation @ 190/0011z

FRS Gyro Calibration Request # 72; LB Bias U/L @ 190/0143z

17222-0 – Fine Attitude Determination & Bias Calculation @ 190/0200z

17223-0 – Uplink N02Z5260C and set ATP pointer.@ 190/0229z

FRS SAC Special Request # 8; ARU/PRT U/L @ 190/0302z

17222-0 – Fine Attitude Determination & Bias Calculation @ 190/0322z

17218-2 – ZGSP Recovery Procedure @ 190/0343z

OPS NOTES EXECUTED: None

                       SCHEDULED     SUCCESSFUL    FAILURE TIMES
FGS GSacq             0                           0
FGS REacq             0                           0      
FHST Update          0                           0
LOSS of LOCK

SIGNIFICANT EVENTS:

Executing Health and Safety (H&S)/Science Instrument (SI) Recovery SMS
SB190O00 (190/04:00Z – 190/22:00Z)

Recovery from Zero Gyro Sun Point (ZGSP) Safemode commenced @
189/14:41Z (OR 17218-2 with attached, red-lined Recovery from Zero
Gyro Procedure 7A). Transition from ZGSP to Software Sun Point
occurred @ 189/15:37Z. Aperture Door was opened @ 189/16:41Z.
Intercepted H&S load @ 190/04:00Z. Started SI recovery @ 190/07:00Z.
ZGSP recovery complete @ 190/03:43Z. Intercept Science SMS expected @
190/22:00Z.

Loaded RGA Scale Factor/Alignment and Gyro Bias Offset Tables (69 and
156) @ 189/14:55Z (OR 17215-3 with COP 3.48a, Section D, Steps D1 –
D5, D7, and D9 and ROP DF-1A). Dumped and compared Table 69 and 156.
No miscompares or missing data.

Performed ZGSP Recovery Coarse Attitude Determination @ 189/15:37Z (OR
17216 with COP 3.46).

Opened +DD SPA Trim Relay @ 189/17:52Z (OR 17213 with COP 4.22).

Enabled Magnetic Field Model Preview Mode @ 189/17:55Z (OR 17220 with
COP 3.53)

Fine Attitude Determination and Bias Calculation @ 189/19:06Z,
189/22:28Z, 190/00:11Z, 02:00Z, and 03:22Z (OR 17222). Uplinked
N02Z5260C and set ATP Pointer @ 190/02:29Z (OR 17223).

Cleared ACS and STIS Engineering Data Reports (MSAFINT1, MSAFINT3) @
189/17:57Z (OR 17219 with ROP NS-05). These reports were both set
upon ACS and STIS entry into safemode when vehicle entered ZGSP.
Reports need to be cleared prior to the start of SI recoveries in the
H&S SMS.