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Proceedings Paper

Status of the cryogenic inertial reference system for the Gravity Probe-B mission
Author(s): John A. Lipa; Dz-Hung Gwo; Randall K. Kirschman
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Paper Abstract

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.

Paper Details

Date Published: 21 January 1993
PDF: 9 pages
Proc. SPIE 1765, Cryogenic Optical Systems and Instruments V, (21 January 1993); doi: 10.1117/12.140876
Show Author Affiliations
John A. Lipa, Stanford Univ. (United States)
Dz-Hung Gwo, Stanford Univ. (United States)
Randall K. Kirschman, Stanford Univ. (United States)

Published in SPIE Proceedings Vol. 1765:
Cryogenic Optical Systems and Instruments V
Ramsey K. Melugin, Editor(s)

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