Flying Blind - Hubble ACS is Out of Commission
NASA engineers are examining a problem related to the Advanced Camera for Surveys (ACS) aboard the Hubble Space Telescope.
On Jan. 27, 2007 the observatory entered a protective "safemode" condition at 7:34 a.m. EST. An initial investigation indicates the camera has stopped functioning, and the input power feed to its Side B electronics package has failed.
The Advanced Camera for Surveys is a third-generation instrument consisting of three electronic cameras, filters and dispersers that detect light from the ultraviolet to the near infrared. The instrument was installed in Hubble by the crew of the Space Shuttle Columbia (STS-109) during a Servicing Mission. With its wide field of view, superb image quality, and exquisite sensitivity, the ACS had 10 times more discovery power than the camera it replaced.
The instrument had been operating on its redundant electronics since June 30, 2006, when NASA engineers transitioned from the primary, Side A, electronics package due to a malfunction. Engineers currently are assessing the option to return ACS science operations to the primary electronics so that observations could resume in a reduced mode.
Hubble was recovered from safemode around 2 a.m. EST on Jan. 28, and observations will resume this week using the remaining Hubble instruments: Wide Field Planetary Camera 2, Near Infrared Camera Multi-Object Spectrograph, and the Fine Guidance Sensors.
An Anomaly Review Board was appointed on Jan. 29, to investigate the ACS situation. The board will perform a thorough investigation and assessment to decide the best course of action. The board is scheduled to present their findings and recommendations by March 2.
"It is too early to know what influences the ACS anomaly may have on Hubble Space Telescope Servicing Mission-4 planning" said Preston Burch, associate director/program manager for the Hubble Space Telescope. "It is important that the review board conduct a thorough investigation that will allow us to determine if there are any changes needed in the new instruments that will be installed on the upcoming servicing mission so that we can be sure of maximizing the telescope's scientific output. We are continuing to make excellent progress in our preparations for the servicing mission, which is presently targeted to fly in September 2008."
For more info:
http://www.nasa.gov/home/hqnews/2007/jan/HQ_0715_Hubble_ACS.html
On Jan. 27, 2007 the observatory entered a protective "safemode" condition at 7:34 a.m. EST. An initial investigation indicates the camera has stopped functioning, and the input power feed to its Side B electronics package has failed.
The Advanced Camera for Surveys is a third-generation instrument consisting of three electronic cameras, filters and dispersers that detect light from the ultraviolet to the near infrared. The instrument was installed in Hubble by the crew of the Space Shuttle Columbia (STS-109) during a Servicing Mission. With its wide field of view, superb image quality, and exquisite sensitivity, the ACS had 10 times more discovery power than the camera it replaced.
The instrument had been operating on its redundant electronics since June 30, 2006, when NASA engineers transitioned from the primary, Side A, electronics package due to a malfunction. Engineers currently are assessing the option to return ACS science operations to the primary electronics so that observations could resume in a reduced mode.
Hubble was recovered from safemode around 2 a.m. EST on Jan. 28, and observations will resume this week using the remaining Hubble instruments: Wide Field Planetary Camera 2, Near Infrared Camera Multi-Object Spectrograph, and the Fine Guidance Sensors.
An Anomaly Review Board was appointed on Jan. 29, to investigate the ACS situation. The board will perform a thorough investigation and assessment to decide the best course of action. The board is scheduled to present their findings and recommendations by March 2.
"It is too early to know what influences the ACS anomaly may have on Hubble Space Telescope Servicing Mission-4 planning" said Preston Burch, associate director/program manager for the Hubble Space Telescope. "It is important that the review board conduct a thorough investigation that will allow us to determine if there are any changes needed in the new instruments that will be installed on the upcoming servicing mission so that we can be sure of maximizing the telescope's scientific output. We are continuing to make excellent progress in our preparations for the servicing mission, which is presently targeted to fly in September 2008."
For more info:
http://www.nasa.gov/home/hqnews/2007/jan/HQ_0715_Hubble_ACS.html
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