A study of sub-ionospheric early VLF perturbations observed at Agra (L=1.15), India


In this paper, we present the results of sub-ionospheric VLF perturbations observed on NWC (19.8 kHz) ransmitter signal propagating in the Earth-ionosphere waveguide, monitored at Agra (Geomag. Lat 27°E, long. 78°N) using SoftPAL receiver. During the period of observation (June, 2011 to December, 2011), we found 75 cases of abrupt amplitude/phase… (More)

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