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On calculating the Earth's $C_{21}$ and $S_{21}$ gravity coefficients in the IERS terrestrial reference frameстатья
Информация о цитировании статьи получена из
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Дата последнего поиска статьи во внешних источниках: 19 июля 2013 г.
- Автор: Kudryavtsev S.M.
- Журнал: Journal of Geodesy
- Том: 73
- Номер: 9
- Год издания: 1999
- Издательство: Springer Verlag
- Местоположение издательства: Germany
- Первая страница: 448
- Последняя страница: 451
- DOI: 10.1007/PL00004000
- Аннотация: Modern models of the Earth's gravity field are developed in the IERS (International Earth Rotation Service) terrestrial reference frame. In this frame the mean values for gravity coecients of the second degree and ®rst order, $C_{21}$( IERS) and $S_{21}$( IERS), by the current IERS Conventions are recommended to be calculated by using the observed polar motion parameters. Here, it is proved that the formulae presently employed by the IERS Conventions to obtain these coecients are insucient to ensure their values as given by the same source. The relevant error of the normalized mean values for $C_{21} $(IERS) and $S_{21}$( IERS) is $3\times 10^{-12}$, far above the adopted cutoff ($10^{-13}$) for variations of these coecients. Such an error in $C_{21}$ and $S_{21}$ can produce non-modeled perturbations in motion prediction of certain artificial Earth satellites of a magnitude comparable to the accuracy of current tracking measurements.
- Добавил в систему: Кудрявцев Сергей Михайлович