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From: starrfie@hydro.la.asu.edu (Sumner Starrfield) Subject: MCC Status Report 14 Date: Wed, 8 Dec 93 22:48:30 MST Forwarded message: >From starrfie Wed Dec 8 22:40:40 1993 Date: Wed, 8 Dec 93 22:40:40 -0700 From: starrfie (Sumner Starrfield) To: starrfie Subject: MCC Status Report 14 - sci.space.news #5159 In article <2e6a0t$cff@reznor.larc.nasa.gov>, sdd@larc.nasa.gov (Steve Derry) writes: Newsgroups: sci.space.news Path: lanews.la.asu.edu!asuvax!cs.utexas.edu!swrinde!elroy.jpl.nasa.gov!ames!dont-send-mail-to-path-lines From: sdd@larc.nasa.gov (Steve Derry) Subject: MCC Status Report 14 Message-ID: <vsnet-history1877@hoge.baba.hajime.jp> To: sci-space-news@uunet.uu.net Followup-To: sci.space Sender: digester@news.arc.nasa.gov Nntp-Posting-Host: jmsparc.larc.nasa.gov Reply-To: s.d.derry@larc.nasa.gov Organization: NASA Langley Research Center, Hampton, VA USA X-Newsreader: TIN [version 1.1 PL8] Date: Wed, 8 Dec 93 21:36:45 MST Approved: sci-space-news@ames.arc.nasa.gov Content-Length: 2270 Lines: 45 MISSION CONTROL CENTER STS-61 Status Report #14 Wednesday, December 8, 1993, 7 p.m. CST Mission Specialists Jeff Hoffman and Story Musgrave are expected to step out of Endeavour's airlock and into the record books tonight as they make STS-61 the first shuttle mission to include five space walks. All of Endeavour's systems are working well, and the Corrective Optics Space Telescope Axial Replacement unit passed its functional tests about 4 p.m. CST. However, controllers at the Space Telescope Operations Control Center at the Goddard Space Flight Center have reported a loss of data lock on the downlink telemetry from the Hubble Space Telescope's main flight computer (DF-224). The telemetry issue arose after co-processor functional tests had been completed with no initial problems. The flight team has turned off the co-processor and formed a "Tiger Team" to analyze vehicle telemetry to better understand the situation. All activities originally scheduled for the upcoming EVA are still planned. However, they have been rearranged to give Goddard engineers additional time to study the anomaly. Commander Dick Covey and Pilot Ken Bowersox will trigger a reaction control system burn about 8:27 p.m. CST (MET 6/17:00) to circularize Endeavour's orbit at 320 nautical miles and prepare for HST reboost and release. Before the space walk begins, the arms that attach the replacement solar arrays to the side of the telescope will be lowered. Next, Hoffman and Musgrave will replace the Solar Array Drive Electronics, which control the array's ability to point toward the Sun and generate electricity to power the telescope. That task is expected to take about an hour and a half. Then, the space walkers will be lifted to the top of the telescope to install multilayer insulation around two of the telescope's magnetometers. Next, the Goddard High Resolution Spectrograph Redundancy Kit will be installed on the telescope, which should take about an hour. Any activities related to the flight computer or the co-processor will be performed between the magnetometer insulation and GHRS installations. The crew began Flight Day 8 at 5:57 p.m. CST with a traditional Swiss song chosen by Mission Specialist Claude Nicollier. -- Sumner Starrfield Department of Physics and Astronomy Arizona State University BOX 871504 Tempe AZ 85287-1504
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