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Correlation of GSO satellite anomalies with space weather data

DSpace at IIT Bombay

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Title Correlation of GSO satellite anomalies with space weather data
 
Creator PATIL, CG
RAJARAM, G
PRASAD, MY
 
Description This work summarizes the main results of our studies at the ISRO cell of IIT-Mumbai, on the relationship between space weather and geostationary satellite anomalies. We point out that the essence of the problem is to understand quantitatively the relationships between changes in space weather at the Sun (S) and the dayside Lagrangian point (L1) on the one hand, and on the other hand the electron/proton fluxes and magnetic field changes at the geostationary altitude (G). Electromagnetic and cosmic ray changes at the Earth surface (E) are also related to the field and particle changes observed at G. We have evolved prediction programs for satellite anomalies based on proton events on the Sun, the solar wind speeds measured at L1, and the 2MeV electron flux enhancements observed at G. The probabilities and time lags of the occurrence of satellite anomalies are also governed by whether the 'shock' in solar wind and IMF parameters detected at L1 is of a 'sharp' or a 'diffuse' type. From a comparative study of the two years 2005 and 2006 with very different space weather conditions, we find that the type and number of anomalies is (1) clearly governed by the magnitude of the interplanetary electric field E(sw), and hence by the IMF B and (2) by the number of proton events on the Sun. We are currently exploring the role played by the ratio of 2MeV electrons to the >1 MeV protons, both at G, in the occurrence of satellite anomalies. (C) 2008 Published by Elsevier Ltd.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2011-10-22T11:11:52Z
2011-12-15T09:10:53Z
2011-10-22T11:11:52Z
2011-12-15T09:10:53Z
2008
 
Type Article; Proceedings Paper
 
Identifier ACTA ASTRONAUTICA,63,458-470
0094-5765
http://dx.doi.org/10.1016/j.actaastro.2007.12.050
http://dspace.library.iitb.ac.in/xmlui/handle/10054/14885
http://hdl.handle.net/100/1718
 
Source 58th International Astronautical Congress,Hyderabad, INDIA,SEP 24-28, 2007
 
Language English