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Topics of the day:

1. STS-125 MCC Status Report #08
2. STS-125 MCC Status Report #09

Date: Fri, 15 May 2009 03:37:10 -0500 From: info@JSC NASA GOV Subject: STS-125 MCC Status Report #08

STS-125 Report #08 Friday, May 15, 2009 - 4:00 a m CDT Mission Control Center, Houston, Texas

Mission Specialists Mike Good and Mike Massimino will venture outside shuttle Atlantis today to complete the second of the mission’s five spacewalks The crew awoke this morning at 3:31 a m CDT to “God of Wonders ” It was played for Good

Today’s spacewalk will begin at 7:16 a m and is scheduled to last 6 5 hours The first major task will be the replacement of all three of Hubble’s rate sensing units (RSUs) Each rate sensing unit contains two gyroscopes, which help the telescope point itself The telescope is designed to operate on three of the six gyros, but today’s spacewalk will give Hubble all new units

The second major task will be the replacement of the battery module in Bay 2 of the telescope Each battery module weighs 460 pounds and contains three batteries Each of the nickel hydrogen batteries weighs 125 pounds, and they provide power to the telescope when it passes into the night sky and the solar arrays are not exposed to the sun All of the batteries on Hubble are original equipment, and they were only designed to operate for five years The STS-125 crew also will install new batteries in Bay 3 of Hubble during the mission’s fifth and final spacewalk

Commander Scott Altman and Mission Specialist Megan McArthur will perform an inspection of some of the shuttle’s heat shield tiles using the robotic arm The teams on the ground weren’t able to get a full view of the tiles during Tuesday’s inspection There are 40 tiles the crew will be examining, and those images will be downlinked to the teams in Houston for analysis Today’s inspection is expected to take 45 minutes

The last item on today’s schedule for the crew is the review of the procedures for tomorrow’s spacewalk, the third of the mission

The crew will enter its sleep period at 7:31 p m and will awake at 3:31 a m The next status report will be issued at the end of the crew’s day or earlier if events warrant

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NASA Johnson Space Center Mission Status Reports and other information are available automatically by sending an Internet electronic mail message to listserv@listserver jsc nasa gov In the body of the message (not the subject line) users should type "subscribe hsfnews" (no quotes) This will add the e-mail address that sent the subscribe message to the news release distribution list The system will reply with a confirmation via e-mail of each subscription Once you have subscribed you will receive future news releases via e-mail

Date: Fri, 15 May 2009 16:45:59 -0500 From: info@JSC NASA GOV Subject: STS-125 MCC Status Report #09

STS-125 Report #09 5 p m CDT Friday, May 15, 2009 Mission Control Center, Houston, Texas

Mission Specialists Michael Good and Mike Massimino spun up the Hubble Space Telescope with six new gyroscopes and a new battery during a 7 hour, 56 minute spacewalk Friday’s was the eighth longest spacewalk in history

The second of the mission’s five spacewalks began at 7:49 a m CDT, and by 3:15 p m the team had accomplished all of the planned objectives Those included replacement of all three rate sensing units (RSUs) Each rate sensing unit contains two gyroscopes, which help the telescope point itself The spacewalkers couldn’t get one of the three units into its slot, but they were able to install a spare that was carried on board because the tight tolerances involved

Good and Massimino removed one of the original battery modules from Bay 2 of the telescope and replaced it with a new unit The module in Bay 3 is scheduled to be replaced by Mission Specialists John Grunsfeld and Andrew Feustel on Monday The batteries provide power to the telescope when it passes into the Earth’s shadow and its solar arrays are not exposed to the sun

Ground controllers at the Space Telescope Operations Control Center at Goddard Space Flight Center in Maryland confirmed that all six gyroscopes and the new battery passed preliminary tests

Commander Scott Altman and Mission Specialist Megan McArthur completed a robotic arm inspection of 40 shuttle heat shield tiles that weren’t in full view during Tuesday’s inspection Based on imagery analysis, mission managers cleared all of Atlantis’ thermal protection systems until a final pre-landing inspection on Tuesday

The last item on today’s schedule for the crew is the review of the procedures for tomorrow’s spacewalk, the third of the mission That spacewalk by Grunsfeld and Feustel will install a new Cosmic Origins Spectrograph and Advanced Camera for Surveys

Because the spacewalk was longer than planned, the crew will go to bed an hour later at 8:31 p m and awaken an hour later at 4:31 a m Saturday The next status report will be issued after the start of the crew’s next day on orbit, or earlier if events warrant

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NASA Johnson Space Center Mission Status Reports and other information are available automatically by sending an Internet electronic mail message to listserv@listserver jsc nasa gov In the body of the message (not the subject line) users should type "subscribe hsfnews" (no quotes) This will add the e-mail address that sent the subscribe message to the news release distribution list The system will reply with a confirmation via e-mail of each subscription Once you have subscribed you will receive future news releases via e-mail

End of HSFNEWS Digest - 15 May 2009 to 16 May 2009 (#2009-48)

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