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Daily 3803
HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science
DAILY REPORT # 3803 PERIOD COVERED: DOY 53 OBSERVATIONS SCHEDULED ACS/HRC/WFC 10444 ACS Two-gyro CVZ Test 4 orbits Only 1 visit. target = star cluster {CVZ star cluster??} Repeat first proposal visits 1-3. guide star V=13 goals: CVZ tracking, PSF, PSF repeatability, pointing stability {requirements 1a, 2, 4, 8} priority medium ACS/WFC/HRC/NIC2 10443 ACS & WFPC2 Two-gyro PSF, pointing and dither test 12 orbits High priority observations {5 orbits} will be observed together at start of two- gyro SMS. Remaining 7 orbits provide further tests and additional experience in two-gyro mode. Goals: PSF, PSF repeatability, pointing and stability within the orbit {requirements 1a, 1c, 2 , 4} FGS 10457 2-Gyro F2G Test Miscellaneous Orbits This proposal is part of the February on-orbit 2-gyro testing. FLIGHT OPERATIONS SUMMARY: Significant Spacecraft Anomalies: (The following are preliminary reports of potential non-nominal performance that will be investigated.) HSTAR 9717: GSacq(2,3,2) failed to RGA Control.GSacq(2,3,2) scheduled for 053/09:53:53 - 10:02:48 Failed to RGA control due to Loss of Lock on FGS #3. This occurred after acquiring Fine Lock during F2G On-Orbit Test. No Observations affected. Under investigation. HSTAR 9719: FHST Obad Failure.FHST OBAD (But No Maneuver) scheduled for 054/05:11:36 Failed due to too many angle checks. A 486 STB message (1904) was received due to the failure. The Vehicle Axis Errors were 403.532, -168.097 and 239.083 (Arcsec). Under investigation. HSTAR 9720: GSacq(1,3,3) Failed to RGA Control.GSacq(1,3,3) scheduled for 054/06:40:46 - 06:48:54 Failed to RGA Control due to Search Radius Limit Exceeded on the Secondary FGS (#3). A Map was commanded at 06:48:01 and had an RSS value of 7.2 (arcsec). No observations affected. Under investigation. COMPLETED OPS REQs: 17378-0 - Reset FGS1 K16ACLIM to 4,982 @ 053/1135z 17370-0 - Continuous Engineering Coverage for F2G OOT (ESTR2 Record to 67.27%) @ 053/1223z-1554z 17384-0 - Genslew for proposal 10445 - slot 1 @ 053/1557z 17384-0 - Genslew for proposal 10445 - slot 2 @ 053/1559z 17384-0 - Genslew for proposal 10445 - slot 3 @ 053/1600z 17370-0 - Continuous Engineering Coverage for F2G OOT (ESTR2 to BOT) @ 053/2219z 17370-0 - Continuous Engineering Coverage for F2G OOT (ESTR2 Record to 12.72%) @ 053/2334z-054/0011z 17387-0 - Dump Tables 368, 369, 370 @ 054/0536z 17388-0 - OBAD Command @ 054/0648z 17379-1 - Reset FGS1 K16ACLIM to 4,982 @ 054/0917z OPS NOTES EXECUTED: 1307-0 - TGS OOT Signal Strength Monitor (in progress) SCHEDULED SUCCESSFUL FAILURE TIMES FGS Gsacq 5 3 053/0953z (HSTAR 9717); 054/0640z (HSTAR 9720) FGS Reacq 5 5 FHST Update OBAD 19 18 054/0511z (HSTAR 9719) LOSS of LOCK SIGNIFICANT EVENTS: Continuing execution of Two-Gyro Science on-orbit test. |
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