Kepler Mission Manager Update, Dec. 22, 2010
On Dec. 22, 2010, Kepler experienced a safe mode event. A safe mode is a self-protective measure that the spacecraft takes when something unexpected occurs. During safe mode, the spacecraft points the solar panels directly at the sun and begins to slowly rotate about a sun-aligned axis. This safe mode orientation provides the vehicle with the maximum power, and limits the buildup of momentum from the solar wind. Engineers immediately began telemetry analysis to determine the spacecraft’s subsystem health and cause of the anomaly. Engineers verified that all of Kepler's subsystems were healthy and functioning properly. Kepler engineers’ initial assessment is that Kepler's Fault Protection system, the on-board software that continuously monitors specific key performance parameters, autonomously initiated the safe mode after sun avoidance alarms were raised.
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Source URL: http://www.nasa.gov/mission_pages/kepler/news/keplerm-20101222.html
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On Dec. 22, 2010, Kepler experienced a safe mode event.
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Kepler Mission Manager Update, Dec. 22, 2010
Source URL: http://www.nasa.gov/mission_pages/kepler/news/keplerm-20101222.html
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