Indian Journal of Radio & Space Physics

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Low latitude ionospheric variations during geomagnetic storms measured using ROCSAT-1 satellite observations


Affiliations
1 Department of Physics, J.C Bose University of Science and Technology, YMCA, Faridabad, Haryana 121 006, India
2 Department of Physics,Manav Rachna University, Faridabad, Haryana 121 001, India
 

In the present paper the response of ionospheric parameters- ion densities and ion temperature (H+, O+ and Ti) to a weak (30 July 1999) and a moderate (13 November 1999) geomagnetic storm (GS) at low latitude Indian region using observed and modelled values has been analyzed. The study has been carried out by using ROCSAT-1 satellite data over the region encompassed between 5-35º geog N and 65-95º geog E at an average altitude ~ 600 km. A comparative study has also been done with the IRI-2016 modelled values. The ionospheric plasma parameters have shown anomalous behaviour during disturbed days in comparison to the quiet days. For the weak GS, both the average O+ and H+ density have been increased by a factor of around 1.8 during disturbed and quiet days respectively as calculated by ROCSAT-1. For the moderate GS, the average O+ and H+ density has been increased by a factor of around 2.7 and 6.3 respectively during disturbed and quiet days respectively, as calculated by ROCSAT-1. And the least or negligible variation has been observed in Ti for both measured and modelled values during weak and moderate GS.
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  • Low latitude ionospheric variations during geomagnetic storms measured using ROCSAT-1 satellite observations

Abstract Views: 498  |  PDF Views: 81

Authors

Geeta Rana
Department of Physics, J.C Bose University of Science and Technology, YMCA, Faridabad, Haryana 121 006, India
Ananna Bardhan
Department of Physics,Manav Rachna University, Faridabad, Haryana 121 001, India
Dinesh Kumar Sharma
Department of Physics,Manav Rachna University, Faridabad, Haryana 121 001, India
ManiKant Yadav
Department of Physics, J.C Bose University of Science and Technology, YMCA, Faridabad, Haryana 121 006, India

Abstract


In the present paper the response of ionospheric parameters- ion densities and ion temperature (H+, O+ and Ti) to a weak (30 July 1999) and a moderate (13 November 1999) geomagnetic storm (GS) at low latitude Indian region using observed and modelled values has been analyzed. The study has been carried out by using ROCSAT-1 satellite data over the region encompassed between 5-35º geog N and 65-95º geog E at an average altitude ~ 600 km. A comparative study has also been done with the IRI-2016 modelled values. The ionospheric plasma parameters have shown anomalous behaviour during disturbed days in comparison to the quiet days. For the weak GS, both the average O+ and H+ density have been increased by a factor of around 1.8 during disturbed and quiet days respectively as calculated by ROCSAT-1. For the moderate GS, the average O+ and H+ density has been increased by a factor of around 2.7 and 6.3 respectively during disturbed and quiet days respectively, as calculated by ROCSAT-1. And the least or negligible variation has been observed in Ti for both measured and modelled values during weak and moderate GS.