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Jet Propulsion Laboratory workers in the Payload Hazardous Servicing Facility (PHSF) are repairing two cracked solar cells on the Mars Global Surveyor solar panels. The panels, extending from the bus of the spacecraft, are partly covered with a protective cloth. The Global Surveyor features four solar array panels as part of its electrical power subsystem; the panels will provide electricity to operate the spacecraft and its scientific instruments. Two nickel hydrogen batteries will do the job when the arrays are not illuminated. The Mars Global Surveyor is on track for a launch Nov. 6 at the beginning of a 20-day launch period aboard a Delta II expendable launch vehicle.