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Gravity Probe B

Testing Einstein's Universe

WEEKLY HIGHLIGHTS FOR WEEK ENDING 19 June 1998:

STANFORD HIGHLIGHT
Dr. Michael Heifetz has completed the Telescope Error Analysis for the Science Mission. Inputs to the analysis include the measured stellar irradiance, the telescope response, and the pointing accuracy. This analysis will be used together with the test data of the Science Mission telescope to verify that telescope performance will meet mission requirements.

SPACE VEHICLE HIGHLIGHT
The qualification unit Thruster Isolation Valve (TIV) has successfully begun qualification testing. The TIV has completed ambient functional, burst, leakage, random vibration and thermal vacuum testing. The TIV is scheduled to begin qualification life testing before the end of June.

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