Page "STS-35" Paragraph 29

Issues with the pointing precision of the IPS and the sequential overheating failures of both data display units ( used for pointing telescopes and operating experiments ) during the mission impacted crew-aiming procedures and forced ground teams at Marshall Space Flight Center ( MSFC ) to aim the telescopes with fine-tuning by the flight crew.

BBXRT was directed from outset by ground-based operators at Goddard Space Flight Center and was not affected.

The X-ray telescope required little attention from the crew.

A crew member would turn on the BBXRT and the TAPS at the beginning of operations and then turn them off when the operations concluded.

After the telescope was activated, researchers at Goddard could " talk " to the telescope via computer.