NASA NTRS · 19680048441
Satellite orbit analysis at Smithsonian Astrophysical Observatory.
Abstract
Orbital analysis precision improvement requiring second order oblateness and lunar, air drag and tesseral harmonics perturbations
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Gaposchkin, E. M.. 1968-01-01. Satellite orbit analysis at Smithsonian Astrophysical Observatory.. https://ntrs.nasa.gov/citations/19680048441
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