Earlier reports Convert Day of Year

The Hubble Space Telescope

Unlocking the Secrets of the Universe

Daily Report #5280

Period Covered:
07:00 pm December 27, 2010 - 06:59 pm December 28, 2010
(DOY 362/0000z - 362/2359z)

Flight Operations Summary

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

12560 - SCI: GSAcq (2,3,3) acquires on FGS 2 only, Scan Step Limit on FGS 2@362/0035z

12561 - SCI: GSAcq(1,0,1) at 362/22:13:46z and at REAcq(1,0,1) at 362/23:20:37z failed to RGA
control with Search Radius Limit exceeded on FGS 1.@362/2216z
Observations affected ACS 66-70, WFC3 67-70 Proposal ID #12064



FGS GSAcq		16		15
FGS REAcq		2		1
OBAD with Maneuver	8		8

Flash Report Venus Observation:  
Section C of IP-219 was successfully performed approximately 362/02:34:10 to active the Post-Venus 
Observation Macro. Macro #2 restored the safemode response back to Inertial Hold and restored the 
Sunpoint sun-angle limit back to 46 degrees.   
The second Venus Observation was successful with a nominal guide-star acquisition  

Program Principal Investigator Program Title
Science Observations Scheduled
11721 Richard Ellis, California Institute of Technology Verifying the Utility of Type Ia Supernovae as Cosmological Probes: Evolution and Dispersion in the Ultraviolet Spectra
12064 Sandra Faber, University of California - Santa Cruz Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey -- UDS Field
12065 Marc Postman, Space Telescope Science Institute Through a Lens, Darkly - New Constraints on the Fundamental Components of the Cosmos
12289 J. Howk, University of Notre Dame A COS Snapshot Survey for z < 1.25 Lyman Limit Systems
12433 Kandis Jessup, Southwest Research Institute Coordinated HST, Venus Express, and Venus Climate Orbiter Observations of Venus
Calibration Observations Scheduled
12342 Tiffany Borders, Space Telescope Science Institute WFC3 UVIS CCD Daily Monitor
12349 Michael Dulude, Space Telescope Science Institute IR Dark Monitor
12380 Bryan Hilbert, Space Telescope Science Institute Guard Darks
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
12404 Michael Wolfe, Space Telescope Science Institute STIS CCD Hot Pixel Annealing
Other Observations Scheduled
12046 David Sahnow, The Johns Hopkins University COS FUV DCE Memory Dump