The Gravity Probe B gyroscope readout system

Details The Gravity Probe B gyroscope readout system The Gravity Probe B gyroscope readout system

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003adspr..32.1397m&link_type=abstract

Advances in Space Research, Volume 32, Issue 7, p. 1397-1400.

Computer Science

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4

Scientific paper

We describe the superconducting gyroscope readout system to be used for measuring to a precision of 1 marcsecond in 10 hours of integration time the spin axis orientation of the Gravity Probe B (GP-B) gyroscope. The cryogenic portion of the readout system uses a dc SQUID to measure the gyroscope's London magnetic moment. Room temperature electronics appropriately bias the dc SQUID, allowing the detection and amplification of the gyroscope signal. We will describe recent advances in the system hardware including improved electronics and packaging. We will show flight quality noise performance and will discuss measurements of the system's rejection of simulated on-orbit environmental influences.

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