Computer Science – Performance
Scientific paper
Jul 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006hst..prop11077s&link_type=abstract
HST Proposal ID #11077. Cycle 15
Computer Science
Performance
Scientific paper
The goal of this program is to verify the performance of the HST under One Gyro operation. As in previous Two Gyro Testing and Orbital Verification programs the analysis will be done by characterizating the HRC Point Spread Function PSF in the F555W filter. Two Primary issues addressed by this proposal: - PSF structure and repeatibility - Pointing, stability, and offset accuracy. PSF will be characterized as a function of - exposure time - guide star brightness - sky position For the Pointing we will characterize: - repeatibility of small offsets - stability within visibility period - stability across occultations. as a function of the guide star brightness The Program requires eight orbits: 7 for the main target, 1 for the secondary target The structure of the visits is identical to the visits executed as part of the program 10458 "ACS and WFPC2 TGSMOV Two-Gyro PSF, Pointing, and Dither Test" with the only exception of the NICMOS parallel than have been removed. The target selection is based on the visibility in the mid June 2007 timeframe. Final target selection will be confirmed after the analysis of the guide star availability.
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