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Article Dans Une Revue Advances in Space Research Année : 2009

Pioneer 10 Doppler data analysis: disentangling periodic and secular anomalies

Résumé

This paper reports the results of an analysis of the Doppler tracking data of Pioneer probes which did show an anomalous behaviour. A software has been developed for the sake of performing a data analysis as independent as possible from that of J. Anderson et al. \citep{anderson}, using the same data set. A first output of this new analysis is a confirmation of the existence of a secular anomaly with an amplitude about 0.8 nms$^{-2}$ compatible with that reported by Anderson et al. A second output is the study of periodic variations of the anomaly, which we characterize as functions of the azimuthal angle $\varphi$ defined by the directions Sun-Earth Antenna and Sun-Pioneer. An improved fit is obtained with periodic variations written as the sum of a secular acceleration and two sinusoids of the angles $\varphi$ and $2\varphi$. The tests which have been performed for assessing the robustness of these results are presented.

Dates et versions

hal-00322209 , version 1 (17-09-2008)

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A. Levy, Bruno Christophe, P. Berio, G. Metris, J-M. Courty, et al.. Pioneer 10 Doppler data analysis: disentangling periodic and secular anomalies. Advances in Space Research, 2009, 43 (10), pp.1538-1544. ⟨10.1016/j.asr.2009.01.003⟩. ⟨hal-00322209⟩
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