Stanley W. Shepperd

Quaternion from Rotation Matrix

Stanley W. Shepperd, S. Shepperd, 1978 .

Universal Keplerian state transition matrix

Stanley W. Shepperd, S. Shepperd, 1985 .

Constant covariance in local vertical coordinates for near-circular orbits

Stanley W. Shepperd, 1991 .

A New Transformation Invariant in the Orbital Boundary-Value Problem

Thomas J. Fill, Richard H. Battin, Stanley W. Shepperd, 1978 .

An onboard navigation system which fulfills Mars aerocapture guidance requirements

Stanley W. Shepperd, Timothy J. Brand, Douglas P. Fuhry, 1989 .