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Compton Gamma Ray Observatory Lifetime Reduced by ADCS Failure

The Compton Gamma Ray Observatory (CGRO), launched on April 5, 1991, was the largest Low Earth Orbit (LEO) spacecraft at 35,000 lbs. However, following a rate gyro failure on December 6, 1999, likely attributed to bearing issues, NASA made the decision to initiate re-entry to prevent an uncontrolled descent. CGRO successfully re-entered Earth's atmosphere on June 4, 2000, after nearly a decade of groundbreaking astrophysical research. More details can be found at NASA's official site.

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Compton Gamma Ray Observatory Lifetime Reduced by ADCS Failure

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  1. Compton Gamma Ray ObservatoryLifetime Reduced by ADCS Failure • At 35,000 lbs, CGRO was the largest LEO spacecraft ever launched on the Shuttle • Launched April 5, 1991 • Rate gyro failed Dec 6, 1999(probably bearing failure) • NASA decided to initiatereentry to avoid the possibility of uncontrolledreentry in the event of future failures • Re-entered June 4, 2000 http://pao.gsfc.nasa.gov/gsfc/spacesci/structure/reentry.htm

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