Physics
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1286..214m&link_type=abstract
PROPAGATION EFFECTS OF VERY LOW FREQUENCY RADIO WAVES: Proceedings of the 1st International Conference on Science with Very Low
Physics
Solar Flares, Radiowaves, Solar Eclipses, Satellites, Artificial, Flares, Waveguides, Transmission Lines, Striplines, Eclipses, Transits, And Occultations, Artificial Earth Satellites
Scientific paper
The VLF radio waves propagate through the Earth-ionosphere waveguide. Irregularities caused by excesses or deficient soft X-rays which sustain the ionosphere changes the waveguide properties and hence the signals are modified. We report the results of our monitoring of the NWC transmitter from Khukurdaha (~80 km away from Kolkata) during the partial solar eclipse (75%) of 15th January, 2010. The receiving station and the transmitter were on two opposite sides of the annular eclipse belt. We got clear depression in the data during the period of partial eclipse. There was also a solar flare (spot no. 1040) on that day during the time the eclipse was near maximum. The flare started from B, reaching maximum to C1.3 (as observed by GOES 14 satellite). We saw the partial effect of this flare since a part of the active region was blocked by the moon. To our knowledge this is the first such incident where the solar flare was observed through lunar occultation.
Chakrabarti Sandip K.
Maji Surya K.
Mondal Sushanta K.
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