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Gravity Probe B

Testing Einstein's Universe

WEEKLY HIGHLIGHTS FOR WEEK ENDING 10 DECEMBER 1999:

STANFORD HIGHLIGHT
All tests and activities prior to probe removal from the dewar have been completed. The system is in the correct configuration for probe removal and the team is proceeding with this complex operation.

Photo: The Science Mission Dewar being tilted into vertical position. Team members include, from left to right, Ed Ingraham, Mike Taber, Russ Leese, Chuck Warren, Tom Welsh and Jon Janicki.

SPACE VEHICLE HIGHLIGHT
Thermal testing of the Composite Necktube Section (the high-fidelity mockup of a Probe C heat station ring assembly) has begun in the vacuum chamber in LMMS building 202. The testing team will cool the unit to liquid nitrogen temperatures and attempt to create thermal gradients from the inner to the outer heat transfer rings along with measuring temperature profiles across the window and ring assembly.

Photo: LMMS Engineers Eric Will and Don Harshman with the LMMS B/202 vacuum chamber.

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