NASA NTRS · 19920036007
Constant covariance in local vertical coordinates for near-circular orbits
Abstract
A method is presented for devising a covariance matrix that either remains constant or grows in keeping with the presence of a period error in a rotating local-vertical coordinate system. The solution presented may prove useful in the initialization of simulation covariance matrices for near-circular-orbit problems. Use is made of the Clohessy-Wiltshire equations and the travelling-ellipse formulation.
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Shepperd, Stanley W.. 1991-12-01. Constant covariance in local vertical coordinates for near-circular orbits. https://ntrs.nasa.gov/citations/19920036007
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