GUVI Biblio





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Found 3 entries in the Bibliography.


Showing entries from 1 through 3


2015

On the equinoctial asymmetry in the threshold height for the occurrence of equatorial spread F

In the present study, the threshold height (h Fc) for ESF occurrence irrespective of the polarity of the meridional winds during vernal and autumnal equinoxes is investigated using a large database spread over 1993\textendash2008. The characteristics of the thermosphere during the two equinoxes have also been examined using TIMED/GUVI O/N2 data. The major aspects that have emerged are (i) presence of significant equinoctial asymmetry inh Fc\ for the years examined, (ii) increas ...

Manju, G.; Haridas, M.K.;

Published by: Journal of Atmospheric and Solar-Terrestrial Physics      Published on: 03/2015

YEAR: 2015     DOI: 10.1016/j.jastp.2015.01.008

Threshold height; O/N2; Equinoctial asymmetry; Solar flux

2013

First observational evidence of the modulation of the threshold height h\textquoterightF c for the occurrence of equatorial spread F by neutral composition changes

[1]\ In the present study, the seasonal and solar activity variations of the threshold height for equatorial spread F occurrence irrespective of the polarity of the meridional winds during magnetically disturbed period are presented for the first time. The modulation of the seasonal pattern of the threshold height by the seasonal mean O/N2 values is also examined. The Ionosonde data of magnetic equatorial location Trivandrum (8.5\textdegreeN, 76.5\textdegreeE) and low latitude station SHAR (13.7\t ...

Haridas, M.; Manju, G.; Pant, Tarun;

Published by: Journal of Geophysical Research: Space Physics      Published on: 06/2013

YEAR: 2013     DOI: 10.1002/jgra.50331

Equatorial Spread F; O/N2; solar activity; Threshold height

2012

Research on Retrieving Thermospheric O/N2 from FUV Remote Sensing

Magnetic storms usually cause significant departures of thermospheric O and N2\ from their normal values. To study the effects on thermospheric neutral species caused by magnetic storms, a method to retrieve thermospheric O/N2\ based on the data obtained from global ultraviolet imager on board TIMED is presented. With the help of AURIC, the normalizations of observing angles and SZAs were preformed to the measurements and a relationship between 135.6/LBHs and O/N2\ was estab ...

Peng, S.; Tang, Y.; Wang, J.; Zheng, X.;

Published by: Spectroscopy and Spectral Analysis      Published on: 05/2012

YEAR: 2012     DOI: 10.3964/j.issn.1000-0593(2012)05-1296-05

AURIC; GUVI; Magnetic storm; O/N2



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