A method of gravity release compensation in the optical alignment of orbiting meteorological sounding and imaging instruments

Details A method of gravity release compensation in the optical alignment of orbiting meteorological sounding and imaging instruments A method of gravity release compensation in the optical alignment of orbiting meteorological sounding and imaging instruments

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988spie..941...61w&link_type=abstract

IN: Automated testing of electro-optical systems; Proceedings of the Meeting, Orlando, FL, Apr. 7, 8, 1988 (A89-33686 13-35). Be

Mathematics

Logic

Alignment, Goes Satellites, Meteorological Instruments, Pointing Control Systems, Gravitational Effects, Meteorological Satellites, Telescopes, Thermal Mapping, Three Axis Stabilization

Scientific paper

This paper describes a method developed for precompensating the front-end (telescope) optical alignment of the Imager and Sounder radiometric instruments, which will be launched as components of the GOES I - M series of meteorological satellites. To satisfy the severe pointing accuracy requirements on these instruments, their alignments must be offset in the one - G field of the laboratory, in order that they will be correct in orbit. A method was developed to make the necessary alignment offset, using a counterweight mechanism; autocollimation returns from reference mirrors on the instrument structure and supporting fixturing provided feedback for adjusting the counterweight mechanism. A series of experiments was performed to verify that these autocollimation return measurements were a good predictor of telescope line-of-sight changes; these experiments are described and their results summarized.

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