Malcolm D. Shuster

Malcolm D. Shuster (31 July 1943 – 23 February 2012) was an American physicist and aerospace engineer, whose work contributed significantly to spacecraft attitude determination. In 1977 he joined the Attitude Systems Operation of the Computer Sciences Corporation in Silver Spring, Maryland, during which time he developed the QUaternion ESTimator (QUEST) algorithm for static attitude determination. He later, with F. Landis Markley, helped to develop the standard implementation of the Kalman filter used in spacecraft attitude estimation. He held teaching assignments at Johns Hopkins University, Howard University, Carnegie-Mellon University and Tel-Aviv University.