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August 7, 1998

John McNamee
Mars Surveyor 98 Project Manager

Mars Climate Orbiter:

Orbiter integration and test activities continue to proceed on schedule. Testing of the repaired optical chopper assembly for the Pressure Modulator InfraRed Radiometer (PMIRR) instrument is complete and the chopper is scheduled for reinstallation on PMIRR on August 7.

Mars Polar Lander:

Landed thermal balance testing was completed very successfully on August 2 validating the passive thermal control approach. Actual thermal performance was within 3 degrees C of predicts. Cruise thermal vacuum testing is scheduled for August 30.

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