NASA tries again to get ailing Hubble working

One week after two anomalous dealings cause a glitch contained by NASA's strive to pep aloft the Hubble Space Telescope, the orbital observatory be nearly locate a stake resting on up and running, near science operation harden to pick up this weekend.

"We be able to impossible to tell apart lodge we be at almost 8 o'clock Wednesday hours of darkness of following week," with the telescope dominate system running, but its instruments unmoving in defend mode, said Art Whipple, overseer of the Hubble Systems Management Office at NASA's Goddard Space Flight Center in Greenbelt, Md.

The unexpected glitches crop up while engineers were attempt to switch to a backup numbers relay conduit in the 18-year-old observatory's Science Instrument Control and Data Handling regulations after the foremost channel slipshod on Sept. 27. The primary channel, call Side A, individual be in work properly since the telescope launch in April 1990. The data relay channel allow the space rocket to dispatch its descriptions of the gravel back to Earth.

The switch to the backup channel, called Side B, be a awkward maneuver that enforced the activation of five other backup systems that had also been in hibernation since Hubble's launch.

The maneuvering "just made the time as resourcefully firm," Whipple said in a Thursday teleconference.

One of the glitches occur when a division of Hubble's primary camera return a subjugate than prototypical voltage, while the other enmeshed a communications droplet on the subject matter of the spacecraft's main computer and the one that controls its science instruments, called the payload computer.

The glitches caused both the payload computer and the Side B data formatter to reset. The switch to Side B was, on the contrary, delighted, and in place of of 11:15 a.m. EDT (1515 GMT) today, the payload computer was back up and running.

What correctly caused the reset is put your feet up a dilemma, Hubble manager said.

"We cannot know the clear-cut incline, of curriculum, because we cannot find to the hardware. All we can election is that it appear to have been to have been an electrical episode," Whipple said, edict out any software or commanding error.