Journal of Atmospheric Electricity
Print ISSN : 0919-2050
Sudden amplitude and phase changes in subionospheric VLF transmitter signals observed at Agra, India
Vikram SinghShikha AgrawalBirbal Singh
Author information
JOURNAL FREE ACCESS

2010 Volume 30 Issue 1 Pages 53-62

Details
Abstract

The amplitude and phase of VLF transmitter signals NWC (19.8 kHz), NPM (21.4 kHz), and NAA (24 kHz) have been monitored at Agra (geomag. lat. 17.10°N, L=1.15), India using AbsPAL receiver for a period of three years between 01 September, 2002 and 30 August, 2005. Seven cases of abrupt amplitude and phase changes have been identified which varied between 3 and 7 dB and 40° and 80° respectively. The onset duration varied around 5 sec. The observed characteristics have been examined in the light of lightning induced electron precipitation (LEP), solar flares, and lightning, and finally attributed to early/slow perturbation caused by distant sprites and lightning along the propagation paths.

Content from these authors
© 2010 Society of Atmospheric Electricity of Japan
Previous article Next article
feedback
Top