Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Solar cycle variation in GONG and MDI data: 1995-2002   Both GONG and MDI projects have measured {\it p}-mode frequencies of the Sun
for more than 7 years. Here we review what we have learnt from the temporal
variation of the oscillation frequencies and splitting coefficients.

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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
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The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ex
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The categories of this paper are: stat
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The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: adap-org
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The categories of this paper are: math-ph