Earlier reports Convert Day of Year

The Hubble Space Telescope

Unlocking the Secrets of the Universe

Daily Report #5333

Period Covered:
07:00 pm February 18, 2011 - 06:59 pm February 19, 2011
(DOY 50/0000z - 50/2359z)

Flight Operations Summary

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

HSTARs:
12702 - GSAcq(2,1,1) scheduled  at 050/03:56:18, REAcq scheduled at 050/05:28:57, REAcq
at050/08:40:36, and  REAcq scheduled at 050/10:16:55 all resulted in fine lock backup
(2,0,2).@050/0356z
Observations possible affected: ACS 137-152 Proposal  ID#12313, WFC3 123 Proposal ID#12342, STIS 75 
Proposal ID#12400,  STIS 76 - 78 Proposal ID #12402, COS 58 proposal ID#12169


12703 - SCI: REAcq(1,2,1) a t50/ 18:41:24 and at 50/20:17:28 both  failed to RGA control with search
radius limit exceeded on FGS 1.@050/1843z
Observations affected: COS 60-61 Proposal  ID#12252


COMPLETED OPS REQUEST:
none

COMPLETED OPS NOTES:
none

FGS ACQ STATUS:
		    SCHEDULED       SUCCESSFUL
FGS GSAcq		4		4
FGS REAcq		9		7
OBAD with Maneuver	4		4

SIGNIFICANT EVENTS:
none


Program Principal Investigator Program Title
Science Observations Scheduled
11665 Thomas Brown, Space Telescope Science Institute The Formation Mechanisms of Extreme Horizontal Branch Stars
12161 David Ardila, Jet Propulsion Laboratory Accretion in Close Pre-Main-Sequence Binaries
12240 Oleg Kargaltsev, University of Florida ACS polarimetry of the Vela Pulsar Wind Nebula
12252 Christopher Churchill, New Mexico State University The Relative Kinematics of Galaxy Emission and Multiple Gas Phases in z~0.5 Extended Galaxy Halos
12313 Harald Ebeling, University of Hawaii An in-depth study of dark matter in the massive cluster merger MACSJ0358.8-2955
Calibration Observations Scheduled
12342 Tiffany Borders, Space Telescope Science Institute WFC3 UVIS CCD Daily Monitor
12400 Michael Wolfe, Space Telescope Science Institute Dark Monitor Part 1
12402 Michael Wolfe, Space Telescope Science Institute CCD Bias and Read Noise Monitor-Part 1
Other Observations Scheduled
12046 David Sahnow, The Johns Hopkins University COS FUV DCE Memory Dump