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| Titel |
Space physics coordinate transformations: the role of precession |
| VerfasserIn |
M. A. Hapgood |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 13, no. 7 ; Nr. 13, no. 7, S.713-716 |
| Datensatznummer |
250011913
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| Publikation (Nr.) |
 copernicus.org/angeo-13-713-1995.pdf |
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| Zusammenfassung |
| Raw data on spacecraft orbits and attitude
are usually supplied in "inertial" coordinates. The normal geocentric
inertial coordinate system changes slowly in time owing to the effects of
astronomical precession and the nutation of the Earth's rotation axis. However,
only precession produces a change that is significant compared with the errors
in determining spacecraft position. We show that the transformations specified
by Russell (1971) and Hapgood (1992) are strictly correct only if the
epoch-of-date inertial system is used. We provide a simple formula for
estimating the error in the calculated position if the inertial system for some
other epoch is used. We also provide a formula for correcting inertial
coordinates to the epoch-of-date from the standard fixed epoch of J2000.0. |
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