The Hubble Space Telescope

Unlocking the Secrets of the Universe

Daily Report #5681

Period Covered:
07:00 pm February 1, 2012 - 06:59 pm February 2, 2012
(DOY 033/0000z - 033/2359z)

Flight Operations Summary

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

HSTARs:
none

COMPLETED OPS REQUEST:
19204-1 - FGS AOI Patch Installation@33/1430z

19205-0 - TMDIAG and TLM Format Switch for AOI@33/1430z

COMPLETED OPS NOTES:
none

FGS ACQ STATUS:
SCHEDULED SUCCESSFUL
FGS GSAcq 6 6
FGS REAcq 8 8
OBAD with Maneuver 4 3

SIGNIFICANT EVENTS:
The installation of the FGS Attitude Observers Initialization patch took place today (2012/33). Ops
Request 19204- FGS AOI Patch Installation and 19205 -TMDIAG and TLM Format Switch for AOI were
followed to uplink Version D of the acquisition logic. The Acquisition logic was loaded and
verified successfully. Overall the installation has proceeded nominally. An additional flash report
will be issued late this afternoon after analysis of the first acquisition and reacquisition.

The first guide star pair acquisition after the AOI patch installation occurred at
2012.033:16:49:11 and achieved Fine Lock nominally. Analysis showed that the AOI patch was
operating as expected. The Reacquisition at 2012.033:18:25:33 also achieved Fine Lock. The Reacq
occurred during a ZOE, but the vehicle was guiding in Fine Lock when telemetry was reacquired at
19:19:00. The first single star acquisition will occur at 2012.033:23:02:02. This acquisition will
be monitored and a flash report will be sent out with its status afterwards.

The first single star acquisition after the AOI FSW patch and Acq Logic installation occurred at
2012.033:23:02:02. The acquisition was successful and everything looked nominal during the
acquisition process. Further monitoring of the acquisition statuses will be performed by the normal
Acq Stats tool and reported by ARS.



Program Principal Investigator Program Title
Science Observations Scheduled
12110 Julianne Dalcanton, University of Washington A Panchromatic Hubble Andromeda Treasury - I
12474 Boris Gaensicke, The University of Warwick The frequency and chemical composition of rocky planetary debris around young white dwarfs
12476 Kem Cook, Eureka Scientific Inc. Measuring the Hubble Flow Hubble Constant
12572 Michele Trenti, University of Colorado at Boulder The Brightest of Reionizing Galaxies Pure Parallel Survey
12614 Orly Gnat, California Institute of Technology Are the Ultra-Compact High-Velocity Clouds Minihalos? Constraints from Quasar Absorption Lines
Calibration Observations Scheduled
12380 Bryan Hilbert, Space Telescope Science Institute Guard Darks
12689 Tiffany Borders, Space Telescope Science Institute WFC3 UVIS CCD Daily Monitor
12711 Abhijith Rajan, Space Telescope Science Institute UVIS Internal Flats
12741 Justin Ely, Space Telescope Science Institute CCD Dark Monitor Part 1
12743 Justin Ely, Space Telescope Science Institute CCD Bias and Read Noise Monitor Part 1