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Impact of the perturbation zonal velocity variation on the spatio/temporal occurrence pattern of L band scintillation—A case study
Author(s) -
Bagiya Mala S.,
Sridharan R.,
Sunda Surendra,
Jose Lijo,
Pant Tarun K,
Choudhary Rajkumar
Publication year - 2015
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
eISSN - 2169-9402
pISSN - 2169-9380
DOI - 10.1002/2015ja021322
Subject(s) - scintillation , variation (astronomy) , perturbation (astronomy) , longitude , geostationary orbit , geodesy , ionosphere , physics , computational physics , meteorology , atmospheric sciences , environmental science , geology , satellite , astrophysics , geophysics , optics , latitude , astronomy , detector
The earlier evolved method for the forecast of the spatiotemporal variation of L band scintillation based on the expected variation of the perturbations, under favorable ionospheric/thermospheric conditions, has been refined by duly accounting for the local time variation of the zonal velocity of the perturbations. The unique combination of the two geostationary satellites (GSAT‐8 and GSAT‐10) over the Indian zone has been used to estimate the typical local time dependence of the perturbation velocities by closely following identifiable features in the scintillation pattern. The measured velocities, that registered a steady decrease with the progression of night, had been shown to significantly alter the forecast pattern of the scintillations with respect to longitude and local time. The significant improvement in the forecast pattern has been demonstrated through a case study putting the forecast method on a firmer footing.