Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Testing Relativistic Effect of Propagation of Gravity by Very-Long
  Baseline Interferometry   It is shown that the finite speed of gravity affects very-long baseline
interferometric observations of quasars during the time of their line-of-sight
close angular encounter with Jupiter. The next such event will take place in
2002, September 8. The present Letter suggests a new experimental test of
general relativity in which the effect of propagation of gravity can be
directly measured by very-long baseline interferometry as an excess time delay
in addition to the logarithmic Shapiro time delay (Shapiro, I. I., 1964, Phys.
Rev. Lett., 13, 789).

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The categories of this paper are: comp-gas
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The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
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The categories of this paper are: patt-sol
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The categories of this paper are: acc-phys
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The categories of this paper are: q-bio
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-lat
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The categories of this paper are: econ
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The categories of this paper are: ao-sci
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The categories of this paper are: chao-dyn
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The categories of this paper are: eess