Tie-In Orbits for the Focal Plane Stability Test - Part 2

Details Tie-In Orbits for the Focal Plane Stability Test - Part 2 Tie-In Orbits for the Focal Plane Stability Test - Part 2

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992hst..prop.4797a&link_type=abstract

HST Proposal ID #4797

Physics

Hst Proposal Id #4797 N/A

Scientific paper

This proposal is part of the TTSC request entitled, "Distortion Calibration in FGS 1 and FGS 2, FGS-to-FGS Alignment Calibration". This portion is listed separately due to the time critical nature of one of the orbits. OFAD in FGS 3 which will be performed in December 1992 together with the Mini OFAD's in FGS's 1 and 2 which will be performed in January 1993 will provide a new set of FGS calibration parameters. One of the objectives of the STScI Focal Plane Stability test is to monitor changes to these parameters by repeatedly observing targets in the cluster M35. Since the cluster is near the ecliptic, only two vehicle orientations are needed, the "fall" and the "spring" pointings (see attached pickles plots). Since the Mini OFAD targets are not necessarily the same targets used in the Focal Plane Stability Test, tie in orbits using the Focal Plane Stability targets are needed shortly before and after the Mini OFAD activities. In addition, the Focal Plane Stability Test may not be

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