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Waspie_Dwarf

Contact Lost With Deep Impact Spacecraft

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Team Attempts to Restore Communications

Mission Status Report

PASADENA, Calif. – Ground controllers have been unable to communicate with NASA's long-lived Deep Impact spacecraft. Last communication with the spacecraft was on Aug. 8, 2013. Deep Impact mission controllers will continue to uplink commands in an attempt to reestablish communications with the spacecraft.

Mission controllers postulate that there was an anomaly generated by the spacecraft's software which left the vehicle's computers in a condition where they are continuously rebooting themselves. If this is the case, the computers would not continue to command the vehicle's thrusters to fire and hold attitude. Lack of attitude hold makes attempts to reestablish communications more difficult because the orientation of the spacecraft's antennas is unknown. It also brings into question the vehicle's electrical power status, as the spacecraft derives its power from a solar array that is fixed, with its cells pointing in one direction.

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