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Study of the anomalous acceleration of Pioneer 10 and 11

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Study of the anomalous acceleration of Pioneer 10 and 11
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http://xxx.lanl.gov/abs/gr-qc/0104064
http://arxiv.org/abs/gr-qc/0104064

General Relativity and Quantum Cosmology, abstract
gr-qc/0104064

From: Slava G. Turyshev [view email]
Date (v1): Thu, 19 Apr 2001 22:42:49 GMT (834kb)
Date (revised v2): Tue, 15 May 2001 20:55:26 GMT (835kb)
Date (revised v3): Tue, 5 Feb 2002 21:05:21 GMT (851kb)
Date (revised v4): Thu, 11 Apr 2002 20:28:10 GMT (851kb)
Date (revised v5): Thu, 10 Mar 2005 23:44:33 GMT (850kb)

Study of the anomalous acceleration of Pioneer 10 and 11
Authors: John D. Anderson, Philip A. Laing, Eunice L. Lau, Anthony S. Liu,
Michael Martin Nieto, Slava G. Turyshev
Categories: gr-qc astro-ph physics.space-ph
Comments: Version 4, of 11 Apr. 2002, with errata appended
Report-no: LA-UR-00-5654
Subj-class: General Relativity and Quantum Cosmology; Space Physics
Journal-ref: Phys.Rev. D65 (2002) 082004

Our previous analyses of radio Doppler and ranging data from distant
spacecraft in the solar system indicated that an apparent anomalous
acceleration is acting on Pioneer 10 and 11, with a magnitude a_P ~ 8 x
10^{-8} cm/s^2, directed towards the Sun (anderson,moriond). Much effort has
been expended looking for possible systematic origins of the residuals, but
none has been found. A detailed investigation of effects both external to
and internal to the spacecraft, as well as those due to modeling and
computational techniques, is provided. We also discuss the methods,
theoretical models, and experimental techniques used to detect and study
small forces acting on interplanetary spacecraft. These include the methods
of radio Doppler data collection, data editing, and data reduction.

There is now further data for the Pioneer 10 orbit determination. The
extended Pioneer 10 data set spans 3 January 1987 to 22 July 1998. [For
Pioneer 11 the shorter span goes from 5 January 1987 to the time of loss of
coherent data on 1 October 1990.] With these data sets and more detailed
studies of all the systematics, we now give a result, of a_P = (8.74 +/-
1.33) x 10^{-8} cm/s^2. (Annual/diurnal variations on top of a_P, that leave
a_P unchanged, are also reported and discussed.)

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