Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Support for temporally varying behavior of the Pioneer anomaly from the
  extended Pioneer 10 and 11 Doppler data sets   The Pioneer anomaly is a small sunward anomalous acceleration found in the
trajectory analysis of the Pioneer 10 and 11 spacecraft. As part of the
investigation of the effect, analysis of recently recovered Doppler data for
both spacecraft has been completed. The presence of a small anomalous
acceleration is confirmed using data spans more than twice as long as those
that were previously analyzed. We examine the constancy and direction of the
Pioneer anomaly, and conclude that: i) the data favor a temporally decaying
anomalous acceleration (~2\times 10^{-11} m/s^2/yr) with an over 10%
improvement in the residuals compared to a constant acceleration model; ii)
although the direction of the acceleration remains imprecisely determined, we
find no support in favor of a Sun-pointing direction over the Earth-pointing or
along the spin-axis directions, and iii) support for an early "onset" of the
acceleration remains weak in the pre-Saturn Pioneer 11 tracking data. We
present these new findings and discuss their implications for the nature of the
Pioneer anomaly.

11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs