Hubble Space Telescope Daily Report #3071 – 13 Mar 2002
HUBBLE SPACE TELESCOPE
DAILY REPORT #3071
PERIOD COVERED: 0000Z (UTC) 03/12/02 – 0000Z (UTC) 03/13/02
Daily Status Report as of 072/0000Z
1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:
1.1 Completed FGS 8994 (Guide Star Acquisition Verification)
The FGSs were used to test and demonstrate HST’s ability to acquire
guide stars with the FGSs. This is a major pre-requisite for all
observations by HST’s SIs when precision pointing under guide star control
is needed. This proposal tested the ability of each of the three FGSs to
acquire a primary guide star while another FGS acquires a secondary guide
star. After acquiring a guide star pair, HST tracked these stars in
finelock for approximately 10 minutes. For a given FGS with a primary
guide star, it does not matter which of the two other FGSs were used for
the secondary star. This decision was based upon guide star pair
availabilty for a given HST pointing. There were no reported problems.
1.2 Completed ACS 9002 (Dump Test and Verification of ACS Memory Loads)
The Advanced Camera for Surveys was used to test and verify the ACS
dump of CS memory capability. Areas dumped include: EEPROM, PROM, EDAC
RAM, and Buffer RAM with the CS in OPERATE mode. The proposal completed
nominally.
1.3 Completed Seven Sets of STIS/CCD 8957 (STIS-01 CCD Functional)
The Space Telescope Imaging Spectrograph (CCD) was used to measure
the baseline performance and commandability of the CCD subsystem. Only
primary amplifier D is used. Bias, Dark, and Flat Field exposures were
taken in order to measure read noise, dark current, CTE, and
gain. Numerous bias frames were taken to permit construction of
“superbias” frames in which the effects of read noise have been rendered
negligible. Dark exposures were made outside the SAA. Full frame and
binned observations were made, with binning factors of 1×1 and
2×2. Finally, tungsten lamp exposures were taken through narrow slits to
confirm the slit positions in the current database. All exposures are
internals.
1.4 Completed WF/PC-2 8949 (Transition from Protect Safe Mode to Hold
Mode and to Protect Decontamination Mode)
The WF/PC-2 was used to perform the instrument transition from
Protect Safe mode to Hold mode, and following RAM verification to Protect
Decontamination. All observations were successful.
1.5 Completed Two Sets of FGS/1 8999 (SM3B Jitter Test)
Fine Guidance Sensor 1R was used in both Position Mode {finelock}
and Transfer Mode to observe selected targets in order to gain insight into
the vehicle jitter characteristics after the alterations made to HST during
SM3B. No problems were encountered.
1.6 Completed Nine Sets of ACS 9003 (Science Data Buffer
Check/Self-Tests for CS Buffer RAM and MIE RAM)
The Advanced Camera for Science was used to check for bit flips
during SAA passages utilizing the ACS Science Buffer RAM. This was
followed by a Control Section {CS} self-test consisting of writing/reading
a specified bit pattern from each me¯G÷) location in Buffer RAM and a
similar test for MIE RAM. The MIE was placed in BOOT mode for its
self-test. The CS Buffer RAM self-test as well as the bit flip tests were
all done with the CS in Operate. The proposal completed as planned.
1.7 Completed Seven Sets of FGS/1 9581 (A BEA Science Program: A High
Angular Resolution Survey of Some of the Galaxy’s Most Massive Stars)
Fine Guidance Sensor #1 was used to make optimal use of otherwise
unused telescope time while HST’s pointing is restricted to the BEA cone
during the first 12 days of SMOV3B. The launch date of Feb 29 placed two
of the Galaxy’s most active star forming regions, Trumplers 14 and 16 in
the Carina Nebula, within the BEA for the entire 12 day period. FGS1r was
used to
conduct a high angular resolution survey of the most massive and luminous
stars in these two magnificent clusters to establish the incidence of
binarity at the high mass end of the HR diagram. This survey will close the
detection gap between spectroscopic and speckle surveys in which duplicity
can be concealed and will dramatically improve our knowledge of the IMF at
the high mass end of the main sequence as well as the luminosity function
{LF} of star forming regions which produce such high mass stars. Finally,
this survey will identify targets for an approved SIM Key Science project
to dynamically determine O-star masses. There was no anomalous activity.
2.0 FLIGHT OPERATIONS SUMMARY:
2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 8
Successful: 8
Scheduled Re-acquisitions: 0
Successful: 0
2.2 FHST Updates:
Scheduled: 13
Successful: 13
2.3 Operations Notes:
Current instrument status:
COSTAR: Currently in Hold.
NICMOS: Completed transition from Boot to SAAOPER. All
temperatures and voltages look good.
STIS: Currently in Operate executing proposals. All temperatures and
voltages look good.
WFPCII: Completed transition from Protect-Safe to Protect-Decon..
ACS: Complete first transition to Operate @071/ 03:29 (WFC and HRC
TEC turn on deferred until 072/06:50) and SMOV Proposal 9002 (see 1.2) “ACS
Dump Test and Memory Loads” complete without a problem. OPS Request 16555
“Configure SDH tasking orders” was execute to allow SDH to capture memory
files. Memory dump was collected from the SSR playback at 071/04:33 and
transferred to BIGCAT. An operations request was used to “Clear ACS Event
Flags 8 and 9 for TEC Turn-0n at 072/0151Z. All temperatures and voltages
look outstanding.
Using ROP Df-18A, the engineering status buffer limits for SESBSLD
were modified twice.
The SSR-1 EDAC error counter was cleared three times per ROP SR-1A.
A TTR was written for a required re-transmit at 071/1239Z during a
486 uplink.
As directed by ROP IC-2, SSA transmitter #2 was turned on for the
interval 071/234800Z to 072/000730Z.
The ephemeris table was loaded at 072/0012Z, using ROP DF-07A.
3.0 SIGNIFICANT FORTHCOMING EVENTS:
Continuation of Servicing Mission Orbital Verification and the
gradual resumption of normal science observations and calibrations.
