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Gravity Probe B

Testing Einstein's Universe

WEEKLY HIGHLIGHTS FOR WEEK ENDING 12 December 1997:

STANFORD HIGHLIGHT
The gyroscope development and system engineering groups have successfully completed the Test Readiness Review for the gyroscope manufacturing verification and commissioning processes. Gyroscope commissioning, consisting of room temperature and low temperature testing, are in progress.

SPACE VEHICLE HIGHLIGHT
Spectrum Astro Inc. engineers (from Gilbert, Arizona), who are designing and fabricating the Attitude Control Electronics (ACE) box for the Relativity Mission Space Vehicle, tested the Helium Thruster flight equivalent control electronics printed circuit board with the helium thruster in building 205 in Palo Alto. The testing was successfully run with the thruster in flight-like thermal vacuum conditions. The testing ran smoothly with excellent correlation between predicted and actual behavior. This testing allows the flight thruster control electronics to be built with high confidence of success.

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