Modelling of post-rain attenuation of microwaves at 22 multiplied by 235 GHz in relation to vertical transport of water vapour

Attenuation of microwaves (up to 30 GHz) around the water vapour absorption line on 22 multiplied by 235 GHz tends to persist even after the stoppage of rain during the monsoon season. A theoretical model has been developed for the post-rain residual absorption of radio waves at 22 multiplied by 235...

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Bibliographic Details
Published in:International journal of remote sensing 1990-01, Vol.11 (10), p.1869-1877
Main Authors: Sen, A K, Das, T K, dev Barman, S, Karmakar, P K, dev Gupta, A K, das Gupta, M K, Calla, O P N, Rana, S S
Format: Article
Language:English
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Summary:Attenuation of microwaves (up to 30 GHz) around the water vapour absorption line on 22 multiplied by 235 GHz tends to persist even after the stoppage of rain during the monsoon season. A theoretical model has been developed for the post-rain residual absorption of radio waves at 22 multiplied by 235 GHz ( lambda = 1 multiplied by 349 cm) by considering the vertical transport of water vapour in the region of the rain event. The theoretical estimate agrees fairly well with that obtained experimentally during different post-rain events, recorded by a radiometer, operating at the Institute of Radio Physics and Electronics, Calcutta University on a round-the-clock basis.
ISSN:0143-1161