DocumentCode :
1923352
Title :
Computation of amplitude and phase of VLF radio waves: Results from comparative study between wave-hop and waveguide mode theory
Author :
Pal, Sujay ; Chakrabarti, Sandip K.
Author_Institution :
S.N. Bose Nat. Centre for Basic Sci., Kolkata, India
fYear :
2011
fDate :
13-20 Aug. 2011
Firstpage :
1
Lastpage :
4
Abstract :
We present a comparative study of the wave-hop theory and waveguide mode theory (namely, Long Wavelength Propagation Capability (LWPC)) for computing the amplitude and phase of VLF signals in the context of Indian sub-continent. We use the Indian Navy VTX station transmitting at 18.2 kHz as an example of the source and compute the propagation characteristics. We find the signal amplitudes as a function of distance from the transmitter using wave hop-theory for VTX-Kolkata propagation path and compare with the same obtained from the LWPC code (Version 2.0) which uses the mode theory. The diurnal and seasonal behaviour of the amplitude of VTX signal using wave-hop code is also presented here. We further compared the azimuthal variation (0-3600) of attenuation rate and phase velocity of VTX-signal at day and night using LWPC (Version 2.0) code and modified LWPC code which includes International Geomagnetic Reference Field (IGRF) model.
Keywords :
ionospheric electromagnetic wave propagation; IGRF model; Indian Navy VTX station; Indian subcontinent; International Geomagnetic Reference Field; LWPC code; VLF radio waves; VTX-Kolkata propagation path; amplitude computation; diurnal behaviour; long wavelength propagation capability; phase computation; propagation characteristics; seasonal behaviour; wave-hop theory; waveguide mode theory; Attenuation; Magnetic levitation; Predictive models; Radio transmitters; Solids; Waveguide theory;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
General Assembly and Scientific Symposium, 2011 XXXth URSI
Conference_Location :
Istanbul
Print_ISBN :
978-1-4244-5117-3
Type :
conf
DOI :
10.1109/URSIGASS.2011.6051014
Filename :
6051014
Link To Document :
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