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The moon and the planets

, Volume 22, Issue 2, pp 191–200 | Cite as

Study of Mars dynamics from lander tracking data analysis

  • N. Borderies
  • G. Balmino
  • L. Castel
  • B. Moynot
Article

Abstract

After the touchdown of the two Viking landers on Mars, radio tracking measurements have been performed between them and Earth-based stations. With use of the first 9 months of data, we have improved the rotation rate and the mean orientation of the spin axis of Mars, referred to its mean orbit. For the first time, some nutations terms have also been estimated. Nevertheless the precise determination of the spin axis motion will require additional data collected during the extended mission. Our solution includes also the lander locations and the relativistic parameter γ.

Keywords

Data Analysis Additional Data Rotation Rate Relativistic Parameter Precise Determination 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© D. Reidel Publishing Co. 1980

Authors and Affiliations

  • N. Borderies
    • 1
  • G. Balmino
    • 1
  • L. Castel
    • 1
  • B. Moynot
    • 1
  1. 1.Groupe de Recherches de Géodésie SpatialeCentre National d'Etudes SpatialesToulouseFrance

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