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Numerical Studies of the Lunar Orbit at Cerga

Published online by Cambridge University Press:  12 April 2016

O. Calame
O. Calame*
Affiliation:
Centre d’Etudes et de Recherches Géodynamiques et Astronomiques Grasse, France

Extract

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Until very recently the only available source of accurate positions for the Moon and planets were the american export ephemerides from JPL in particular DE86/LE40 which expired in May 1979 and then DE96/LE44 and DE102/LE51. Unfortunately, these ephemerides were constructed for various applications, but are not necessarily adapted for a purpose such as the EROLD program. Furthermore, these ephemerides are badly documented, which prevents having good homogeneity with the computations for the representation of the various motions of a lunar laser reflector with respect to a terrestrial station. Thus, in this framework, some other studies were useful.

A few years ago, we decided that it would be desirable to support the Lunar Laser data reduction with the construction of a new ephemeris by numerical integration. This was considered valuable not only from the scientific point of view, but also as an operational tool for the EROLD and MERIT programs. Early in 1980, we adopted this ephemeris, called ECT 18, in the EROLD computations for the Annual Reports of BIH and for the needs of MERIT Operating Center and Analysis Center at CERGA.

Type
Part III
Information
International Astronomical Union Colloquium , Volume 63: High-Precision Earth Rotation and Earth-Moon Dynamics , May 1981 , pp. 233 - 243
Copyright
Copyright © Reidel 1982

References

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