Daily # 4292

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science

DAILY REPORT # 4292

PERIOD COVERED: UT February 02,03,04, 2007 (DOY 033,034,035)

OBSERVATIONS SCHEDULED

WFPC2 11025

WFPC2 Cycle 15 CTE Monitor

Monitor CTE changes during Cycle 15. Test for chip-to-chip differences
in CTE.

FGS 10927

The Weight-Watcher Program for Subdwarfs

We propose to use HST/FGS1r to measure five subdwarf spectroscopic
binaries to determine masses for the components. Their metallicities,
[Fe/H], range from -0.5 to -2.5, and their projected minimum
separations range from 9 to 24 mas. These binaries are resolvable with
HST/FGS1r but not any ground-based technique. Currently, there are
only two subdwarf systems having any mass measurements. The proposed
work will boost the total number of subdwarf systems with masses from
two to seven, and allow us to construct the first mass-luminosity
relation for low-metallicity stars.

FLIGHT OPERATIONS SUMMARY:

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

HSTARS:

10669 - NICMOS 602 & 599

At AOS 033/19:00:47 observed that at 033/18:36:20 Received Status
Buffer Error NICMOS 602 DUMP TIMEOUT ERROR (P=1, T=12270). At
033/18:36:21 received Status Buffer Error NICMOS 599 DUMP IMAGES NOT
DEALLOCATED (P=3, T=12278). SI/SE contacted FOT reference these
errors.

10670 - GSAcq (2,1,2) failed to RGA Hold

At 034/02:45:47 GSAcq (2,1,2)scheduled from 034/02:42:20-02:49:47 had
failed to RGA Hold (Gyro Control). Mnemonics QF2STOPF & QSTOP were
flagging. OBAD #1: V1 -452.30, V2 -239.05, V3 139.60, RSS 530.29 OBAD
#2: V1 7.28, V2 0.08, V3 2.45, RSS 7.68 OBAD MAP: V1 -1.41, V2 15.25,
V3 -0.52, RSS 15.32

10671 - GSAcq(2,1,2) failed to RGA Hold (Gyro Control)

The GSAcq(2,1,2) scheduled at 035/04:49:47 - 04:57:52 failed to RGA
Hold due to (QF2STOPF) stop flag indication on FGS2. Pre-acquisition
OBADs showed (RSS) attitude correction values of 792.19 and 11.57
arcseconds. Post-acquisition OBAD/MAP had 3-axis (RSS) value of 554.46
arcseconds.

10672 - OBAD Failed

OBAD at 035/13:47:12 failed at 13:49:59. 486 message 1903 "OBAD Failed
Quaternion" was received.

10673 - Structure Current (primary) limit violation

Structure Current(CSTRUCCP) flagged yellow high, 5.6 amps, for 1
sample. Ops Note 1550-2(2006/355) increased structure current limits
by 2 counts due to section 4 solar array short. Current yellow high,
5.4 amps. Flag occurred at the end of orbit day.

COMPLETED OPS REQUEST:
18010-1 - Set Up Tasking Orders for NICMOS FW test
18011-0 - Configure Tasking Orders after FW test activities
18015-0 - Reset NICMOS science data que
18009-0 - Enable Filter Wheel Commanding

COMPLETED OPS NOTES:
1570-0 - NCC Pressure Limit Adjustment
1571-0 - NICMOS Dewar Temperature Limit Adjustment
1572-1 - Reset NICMOS Error Counter per SISE directive
1571-1 - NICMOS Dewar Temperature Limit Adjustment

SCHEDULED SUCCESSFUL
FGS GSacq 13 11
FGS REacq 03 03
OBAD with Maneuver 32 31

SIGNIFICANT EVENTS:

The STcI and SISEs have completed their analysis of the NICMOS science
and engineering data and have concluded that all three filter wheels
are performing nominally. The engineering analog diagnostic data along
with all of the SD images were analyzed and provided more than
sufficient evidence that the filter wheels were performing nominally.
3 internal darks were loss, with no real consequence. At ~34/02:43 the
NICMOS FW enable flag was set to enable.