Abstract
A Total Solar Eclipse (TSE) provides us with an exciting opportunity to study the VLF propagation effects under a controlled experimental condition where the extreme ultraviolet and the X-rays from the sun are totally blocked by the moon. During the total eclipse of July 22nd, 2009, the Indian Centre for Space Physics conducted a VLF campaign to obtain the signal from a dozen of places in the Indian sub-continent. Six of these locations gave very good and noise-free data. In some of these data, the signal amplitude is found to be higher than that at non-eclipse condition, while in some other places, it is lower. We present the results of our campaign and give an interpretation of the results using the Long Wavelength Propagation Capability (LWPC) code in a perturbed waveguide both for the easterly and westerly propagation paths.
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