Scientific Mini Ofad Cycle 4 Calibration

Details Scientific Mini Ofad Cycle 4 Calibration Scientific Mini Ofad Cycle 4 Calibration

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994hst..prop.5553t&link_type=abstract

HST Proposal ID #5553

Astronomy and Astrophysics

Astronomy

Hst Proposal Id #5553

Scientific paper

The goal of these activities is to calibrate the changes to the optical field angle distortions (OFAD) of FGS unit #3 that resulted from the post-servicing mission movement of the HST secondary mirror. 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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