Computer Science – Performance
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pasp..106..542h&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 106, no. 699, p. 542-547
Computer Science
Performance
1
Astronomical Interferometry, Binary Stars, Computerized Simulation, Guidance Sensors, Hubble Space Telescope, Inertial Navigation, Navigation Instruments, Star Trackers, Angular Distribution, S Curves, Star Distribution, Stellar Magnitude
Scientific paper
The interferometric system used for the guidance of the Hubble Space Telescope (HST) is sensitive to close binaries. Before the launch of HST it was believed that up to 25% of all guide-star pairs would lead to guidance failure due to duplicity. After more than 3 yr of operation the actual failure rate ascribable to duplicity is estimated to be just below 1%. A computer simulator has been developed to understand the causes of the discrepancy. The simulation indicates a failure rate of under 2% per guide-star pair, in much closer agreement with the observed performance of the guiding system. The failure criterion originally used was based on the manufacturer's expectations, and was too conservative. The proportion of binary guide stars in the critical separation range had also been somewhat overestimated.
Bely Pierre-Yves
Hershey John L.
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