NASA NTRS · 19730019115
ERTS orbit maintenance
Abstract
Error drift in the ERTS orbit maintenance problem is determined from the actual ground trace errors that the spacecraft experienced over the first 3 1/2 repeat cycles. Actual data are fitted to a parametric model of ground trace error by a least squares method, and initial offsets to these key parameters as well as their rates of change are extrapolated forward analytically to obtain the future ground trace drift in orbital estimates.
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Fuchs, A. J.. 1973-01-01. ERTS orbit maintenance. https://ntrs.nasa.gov/citations/19730019115
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