Status of the cryogenic inertial reference system for the Gravity Probe B mission

Details Status of the cryogenic inertial reference system for the Gravity Probe B mission Status of the cryogenic inertial reference system for the Gravity Probe B mission

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993spie.1765...85l&link_type=abstract

In: Cryogenic optical systems and instruments V; Proceedings of the Meeting, San Diego, CA, July 23, 24, 1992 (A93-28226 10-19),

Computer Science

1

Cryogenic Gyroscopes, Gravity Probe B, Inertial Reference Systems, Reference Stars, Reflecting Telescopes, Earth Orbital Environments, Earth Rotation, Relativistic Theory

Scientific paper

We describe the status of the development and testing program for the inertial reference system for the Gravity Probe B gyroscopes. The gyroscope housings are attached to a cryogenic telescope with a 14 cm aperture that continuously points at a guide star. The star image is split to provide quadrant pointing information which is used to steer the spacecraft. This data is also combined with the gyro readout data to provide an absolute precession measurement. Motion of the guide star is independently checked by reference to background galaxies. Room temperature testing of a prototype telescope has been completed and preparations are being made for low temperature tests.

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