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Gravity Probe B

Testing Einstein's Universe

WEEKLY HIGHLIGHTS FOR WEEK ENDING 18 FEBRUARY 2000:

STANFORD HIGHLIGHT
The probe thermal repair work continued this week with a set of thermal tests designed to pinpoint the location of the thermal disconnect in Probe C. These tests show that the disconnect is located in one of the CNT to internal copper ring joints and is sensitive to probe orientation. These tests confirm that the planned probe repair will fix the thermal disconnect anomaly. Stanford personnel involved in supporting this LM task are R. Brumley and C. Gray.

Photo: Probe C in the class 10 clean room during thermal conductivity testing.

SPACE VEHICLE HIGHLIGHT
Rita Miller and the S/C test team successfully loaded the latest version of the flight software into the SSR (Solid State Recorder), as well as telemetry formats and safemode SPCs (Stored Program Commands). Additionally, the latest version of the SUS (Start Up Software), with telemetry formats and safemode SPCs were loaded into the main flight computer, the CCCA. Both sides of the CCCA can now be boot from the SSR, cutting initialization time by nearly 30 minutes. This will also facilitate the S/C Functional testing.

Photo: LMMS Engineer Rita Miller with the SSR/IU pallet on the space craft in B/205.

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