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March 18, 1999

Mars Climate Orbiter (MCO)

The MCO spacecraft experienced a week of quiescent operation, as the flight team focused on Trajectory Correction Maneuver #2 (TCM-2) for the lander and monitoring the lander's transition to its revised attitude control strategy.

Mars Polar Lander (MPL)

Mars Polar Lander successfully performed its second midcourse maneuver, TCM-2, on Monday, Mar. 15. Spacecraft performance during the maneuver was excellent, and post-maneuver navigation estimates of the flight path indicate the maneuver was implemented well within the allowable execution error envelope. MPL is now operating under control of its third housekeeping sequence, and is successfully employing the updated attitude control strategy developed during February and for which the needed commanding was accomplished last week.

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