Earlier reports Convert Day of Year

The Hubble Space Telescope

Unlocking the Secrets of the Universe

Daily Report #5337

Period Covered:
07:00 pm February 22, 2011 - 06:59 pm February 23, 2011
(DOY 54/0000z - 54/2359z)

Flight Operations Summary

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

12709 - SCI: GSAcq(1,2,1) results in Fine Lock Backup (1,0,1) @054/1519z
Observations Possible affected: ACS 36-39, Proposal ID#12310.

12711 - SCI: GSACQ(2,0,2) fails to RGA, Scan Step Limit on FGS 2 @054/1954z
Observations affected: WFC3 65, Proposal ID#12307.

12712 - SCI: GSAcq(1,2,1) required multiple attemtps,initially received a search radius limit
exceeded flag on FGS2. The second acquisition attempt to initially achieve FL-DV on both FGSs, but
was not able to maintain it. The third attempt was successful.@045/1359z

12713 - SCI: GSAcq(1,2,1) requires two attempts for FL-DV@045/1741z



FGS GSAcq		9		8
FGS REAcq		7		7
OBAD with Maneuver	8		8


Program Principal Investigator Program Title
Science Observations Scheduled
12240 Oleg Kargaltsev, University of Florida ACS polarimetry of the Vela Pulsar Wind Nebula
12278 Thomas Ayres, University of Colorado at Boulder Advanced Spectral Library Project: Cool Stars
12289 J. Howk, University of Notre Dame A COS Snapshot Survey for z < 1.25 Lyman Limit Systems
12307 Andrew Levan, The University of Warwick A public SNAPSHOT survey of gamma-ray burst host galaxies
12310 Goeran Oestlin, Stockholm University LARS - The Lyman Alpha Reference Sample
12311 Giampaolo Piotto, Universita di Padova Multiple Stellar Populations in Galactic Globular Clusters
12324 C. Kochanek, The Ohio State University The Temperature Profiles of Quasar Accretion Disks
Calibration Observations Scheduled
12342 Tiffany Borders, Space Telescope Science Institute WFC3 UVIS CCD Daily Monitor
12351 Knox Long, Space Telescope Science Institute IR Persistence 18
12384 David Golimowski, Space Telescope Science Institute CCD Daily Monitor {Part 1}
12392 Ralph Bohlin, Space Telescope Science Institute Photometric Cross-Calibration using Stellar Flux Standards
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