Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7024b&link_type=abstract
HST Proposal ID #7024
Astronomy and Astrophysics
Astronomy
Hst Proposal Id #7024
Scientific paper
The goal of these activities is to calibrate the changes to the optical field angle distortions {OFAD} of FGS unit #3 that result from the servicing mission. This calibration will return the knowledge of the OFAD, to within an arbitrary scale factor, to a level of accuracy sufficient to support an overall astrometry error budget of +/- 0.0027 arcseconds rms. The actual solutions will provide the Project Data Base with the significant terms, their values, and their covariances including errors, which may then be applied to general FGS observations to reduce them for field angle distortions, except scale, alignment, and color corrections.
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