Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of Total Electron Content-TEC and electron density profile during
  geomagnetic storms   Total Electron Content (TEC) and electron density are the basic parameters,
which determine the major properties of the Ionosphere. Detail study of the
ionospheric TEC and electron density variations has been carried out during
geomagnetic storms, with longitude and latitude, for four different locations:
(24{\deg}W-14{\deg}W, 25{\deg}S-10{\deg}S); (53{\deg}W- 46{\deg}W,
04{\deg}N-14{\deg}N); (161{\deg}E-165{\deg}E, 42{\deg}S-34{\deg}S), and
(135{\deg}W- 120{\deg}W, 39{\deg}S-35{\deg}S) using the COSMIC satellite data.
In order to find the background conditions of the ionosphere, the solar wind
parameters such as north-south component of inter planetary magnetic field
(Bz), plasma velocity (Vsw), AE, Dst and Kp indices, have also been correlated
with the TEC and electron density. The results illustrates that the observed
TEC and electron density profile significantly vary with longitudes and
latitudes as well. This study illustrates that the values of TEC and the
vertical electron density profile are influenced by the solar wind parameters
associated with solar activities. The peak value of electron density and TEC
increase as the geomagnetic storms becomes stronger. Similarly, the electron
density profile vary with altitudes which peaks around the altitude range of
about 180-280 km, depending on the strength of geomagnetic storms. The results
clearly show that the peak electron density shifted to higher altitude (from
about 180 km to 300 km) as the geomagnetic disturbances becomes stronger.

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The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
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The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
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The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
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The categories of this paper are: funct-an
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga