Determine Moving Target Plate Scale AST-SV-4

Details Determine Moving Target Plate Scale AST-SV-4 Determine Moving Target Plate Scale AST-SV-4

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991hst..prop.1415j&link_type=abstract

HST Proposal ID #1415

Astronomy and Astrophysics

Astronomy

Hst Proposal Id #1415

Scientific paper

The goal of this procedure is to measure the plate scale of the FGSs to 0.002 arcsec over the length of the FGSFOV by measuring a minor planet as it traverses the FGSFOV. The derived numbers will go into the Calibration ST ScI database for SDAS reductions of individual FGS astrometric observations. A composite number, as yet TDB, will go into the Project database to replace the preliminary value of the OTA Plate Scale derived from the mini-OFAD. The minimum SV plan calls for FGS1 and FGS3 (bay numbers) to be calibrated absolutely using the moving target.

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