On Satellite Umbra/Penumbra Entry and Exit Positions
| Autor: | David A. Vallado, Beny Neta |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Physics
Elliptic orbit Geosynchronous orbit Aerospace Engineering Perturbation (astronomy) Astronomy Radiation Geodesy Solar wind Radiation pressure Space and Planetary Science Quartic function Physics::Space Physics Astrophysics::Solar and Stellar Astrophysics Satellite Astrophysics::Earth and Planetary Astrophysics |
| Zdroj: | The Journal of the Astronautical Sciences. 46:91-103 |
| ISSN: | 2195-0571 0021-9142 |
| Popis: | The problem of computing Earth satellite entry and exit positions through the Earth’s umbra and penumbra, for satellites in elliptical orbits, is solved without the use of a quartic equation. A condition for existence of a solution in the case of a cylindrical shadow is given. This problem is of interest in case one would like to include perturbation force resulting from solar radiation pressure. Most satellites (including geosynchronous) experience periodic eclipses behind the Earth. Of course when the satellite is eclipsed, it’s not exposed to solar radiation pressure. When we need extreme accuracy, we must develop models that turn the solar radiation calculations “on” and “off,” as appropriate, to account for these periods of inactivity. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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