The Hubble Space Telescope

Unlocking the Secrets of the Universe

Daily Report #5794

Period Covered:
08:00 pm May 24, 2012 - 07:59 pm May 25, 2012
(DOY 146/0000z - 146/2359z)

Flight Operations Summary

This report was generated by the HST Automated Report System @2012-05-26 17:02:00 GMT

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

HSTARs:
none

COMPLETED OPS REQUEST:
none

COMPLETED OPS NOTES:
none

FGS ACQ STATUS:
		    SCHEDULED       SUCCESSFUL
FGS GSAcq		0		0
FGS REAcq		0		0
OBAD with Maneuver	0		0

SIGNIFICANT EVENTS:
The COS FUV Special Recovery activities (proposal 12810 visits 6 - 7) successfully completed today 
without incident.  The FUV was ramped to the 1st HV plateau -4916V/-4869V (154/151) with the QE 
grid off, no elevated counts or HV current transients were observed in the engineering telemetry 
during or after the ramp.  The STScI and MOSES2 Engineering Teams have examined the relevant 
telemetry and confirmed all voltages, currents and temperatures were as expected. The voltage and 
current monitors matched the signatures seen in SMOV.  The COS Science Team at STScI has examined 
the science data and DCE memory dumps  and everything is nominal.  No HV current transients or 
unexpected elevated count rates were observed in the DCE memory dumps. The science data consisted 
of 2 sets of dark and wavecal exposures. The exposures were collected immediately after ramping to 
HVNom (154/151) and an hour later at the same HV level.  Comparisons with SMOV data taken with the 
QE grid on indicates comparable behavior with the grid off when the aging of the detector and 
temporal fluctuations are considered. The Engineering and Science Teams have given a "Go" to 
proceed with visit 8 and 9. Visits 8 and 9 are scheduled for Tuesday May 29th (DOY 150).  The COS 
event flag 3 was cleared @146/20:25 via OR 19247  -jb