SVN 9 was a GPS Block I research and development satellite. When it was launched in Jun. 1984, questions regarding the future performance of atomic frequency standards in orbit remained to be answered. In Mar. 1994, after performing for twice its designed life span, SVN 9 was deactivated as a member of the operational GPS satellite constellation. During the next two months, U.S. Air Force and Rockwell personnel performed various tests to determine just how well the atomic frequency standards had withstood ten years in the space environment. The results of these tests are encouraging. With a full constellation of Block II/IIA satellites on orbit, as well as the anticipated launch of the Block IIR satellites, results from the end of life testing will be helpful in assuring the continued success of the GPS program.


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    Testing for Life

    Emerald Group Publishing | 1986


    Fundamentals of Life Testing

    McCall, Chester H. / Roberts, Howard R. | SAE Technical Papers | 1963


    Load-Life Cycle Testing

    Dibert, Clair G. / Fairhurst, William M. | SAE Technical Papers | 1962


    Highly Accelerated Life Testing

    Parsons, David S. | NTRS | 2019


    Life Prediction and Virtual Testing

    Abdi, F. / Chamis, C. / Farahmand, B. et al. | British Library Conference Proceedings | 2000