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Earth Satellite Program
10-27-2020, 11:03 AM
Post: #1
Earth Satellite Program
"                                              ABSTRACT
     The Earth Satellite Program (ESP) version 2.0 is a user-friendly, highly graphical,
Macintosh-based program that was developed for the Air Force MILSTAR program to support
satellite constellation and ground site terminal design studies. The computer program generates
satellite ground tracks; computes elevation angles, ranges, and range rates; determines outage
zones for a constellation of satellites; and generates spot beam projections. Any elliptical
Earth-orbit may be accommodated. A fourth-order Runge-Kutta integrator is used to propagate
satellite orbits. Perturbations due to the Earth's oblateness (J2 effects), atmospheric drag, and
solar radiation pressure are included. This paper contains a user's guide to the program,
presents the underlying mathematical models, and includes several sample outputs and the
software on diskette. "

the Earth Satellite Program (ESP), version2.0, Electronic Systems Command (AFMC), Hanscom AFB, FEB 1994, 102 pages

ps: emphasis mine
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