There are 2 messages totalling 57 lines in this issue

Topics of the day:

1. STS-125 MCC Status Report #10
2. STS-125 MCC Status Report #11

Date: Sat, 16 May 2009 04:38:19 -0500 From: info@JSC NASA GOV Subject: STS-125 MCC Status Report #10

STS-125 Report #10 Saturday, May 16, 2009 - 5:00 a m CDT Mission Control Center, Houston, Texas

Mission Specialists John Grunsfeld and Drew Feustel are preparing to begin the third spacewalk of Atlantis’ mission to the Hubble Space Telescope The crew awoke this morning at 4:31 a m CDT to “Hotel Cepollina” performed by Fuzzbox Piranha The song was played for Grunsfeld

The first activity for today’s spacewalk is the removal of the Corrective Optics Space Telescope Axial Replacement (COSTAR) and the installation of the new Cosmic Origins Spectrograph (COS) COSTAR has been on board Hubble since the first servicing mission in 1993 It has served as a sort of “contact lens” for Hubble and was designed to correct a problem with the telescope’s optics The new COS will be the most sensitive spectrograph ever flown on Hubble and will examine large scale structures in the universe The COS weighs 851 pounds and is the size of a phone booth

The second major task for Grunsfeld and Feustel is the repair of the Advanced Camera for Surveys (ACS) The ACS is one of Hubble’s primary cameras and was installed during the fourth servicing mission the telescope in 2002 It stopped working in early 2007 due to a short circuit in its backup power supply, but it has been responsible for some of the most famous imagery captured by Hubble Grunsfeld and Feustel will focus on replacing some of the camera’s electronics, which will require them to remove 32 screws from an access panel To accomplish this, the astronauts will use a custom made fastener capture plate that will lie over the top of the access panel and keep the screws from floating away

Once complete, the entire crew will review the procedures for tomorrow’s spacewalk, which will be conducted by Mike Good and Mike Massimino

The crew’s sleep period will begin at 8:31 p m and crew wake will be at 4:31 a m tomorrow The next status report will be issued at the end of the crew’s day or earlier, if events warrant

-end-

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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: Sat, 16 May 2009 16:04:48 -0500 From: info@JSC NASA GOV Subject: STS-125 MCC Status Report #11

STS-125 Report #11 4 p m CDT Saturday, May 16, 2009 Mission Control Center, Houston, Texas

Mission Specialists John Grunsfeld and Andrew Feustel completed the third spacewalk of Atlantis’ mission to the Hubble Space Telescope in 6 hours, 36 minutes, stepping smoothly through the difficult tasks of repairing a delicate camera and installing its most sensitive spectrograph ever

Grunsfeld and Feustel began the spacewalk at 8:35 a m , removing the telescope’s 16-year-old “contact lens,” the Corrective Optics Space Telescope Axial Replacement (COSTAR), and safely tucked it into the shuttle’s payload bay The two then installed the new Cosmic Origins Spectrograph (COS), which will allow Hubble to peer farther into the universe than ever before in the near and far ultraviolet ranges

Then, Grunsfeld and Feustel used specially designed tools to carry out a job never intended to be done on a spacewalk, repairing the Advanced Camera for Surveys (ACS) The camera, known for some of the most famous imagery captured by Hubble, had stopped working in early 2007 when its backup power supply short circuited The two removed 32 screws from an access panel to efficiently replace the camera’s four circuit boards and install a new power supply

In a test conducted from the Space Telescope Operations Control Center at Goddard Space Flight Center in Greenbelt, Md , engineers powered up the 851-pound COS to make sure its power and data connection were operating While the astronauts sleep, the team will conduct additional functional tests on each component to determine if the astronauts will need to perform additional work The COS will be calibrated over the next several weeks

The spacewalk was the 80th in space shuttle history Grunsfeld now ranks fourth among all spacewalkers, with 51 hours, 28 minutes to his credit over seven excursions

Tomorrow, astronauts Michael Good and Mike Massimino will repair the Space Telescope Imaging and Spectrograph (STIS) and install the New Outer Blanket Layer (NOBL)

The crew’s sleep period will begin at 8:31 p m and crew wake will be at 4:31 a m tomorrow The next status report will be issued tomorrow morning 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 - 16 May 2009 to 17 May 2009 (#2009-49)

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