Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Millisecond solar radio bursts in the metric wavelength range   A study and classification of super-short structures (SSSs) recorded during
metric type IV bursts is presented. The most important property of SSSs is
their duration, at half power ranging from 4-50 ms, what is up to 10 times
shorter than spikes at corresponding frequencies. The solar origin of the SSSs
is confirmed by one-to-one correspondence between spectral recordings of
Artemis-IV1 and high time resolution single frequency measurements of the
TSRS2. We have divided the SSSs in the following categories:
  1. Broad-Band SSSs: They were partitioned in two subcategories, the
SSS-Pulses and Drifting SSSs;
  2. Narrow-band: They appear either as Spike-Like SSSs or as Patch-Like SSSs;
  3. Complex SSS: They consist of the absorption-emission segments and were
morphologically subdivided into Rain-drop Bursts (narrow-band emission head and
a broad-band absorption tail) and Blinkers.

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The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
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The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
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The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
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The categories of this paper are: gr-qc
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The categories of this paper are: cs
30
The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
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The categories of this paper are: supr-con
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph