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ISSN 2415-3400 (Online)
ISSN 1028-821X (Print)

RETRIEVAL OF RAIN INTENSITY BY SOLUTION OF INTEGRAL EQUATION OF SCATTERING IN THE CASE OF DOUBLE FREQUENCY SENSING

heading: 
RADIOWAVE PROPAGATION, RADIOLOCATION AND REMOTE SENSING
Linkova, AM
Organization: 

O. Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine
12, Proskura st., Kharkov, 61085, Ukraine
E-mail: gannalinkova@gmail.com
https://doi.org/10.15407/rej2017.03.023
Language: Russian
Abstract: 

Measurement of precipitation amount is of great inte-rest for solution of many practical problems of national economy
and agriculture. In this case, the inverse problem of recovering the rain intensity using radar methods is an incorrect problem of mathe-matical physics and is described by a nonlinear integral equation. An approach for solving the integral equation of the electromagnetic waves scattering by a polydisperse medium of water drops is considered by means of double frequency remote sensing in the microwave range. Numerical simulation for retrieval of rain intensity in the range of 1…30 mm/h is performed for operating wavelengths 0.82 and 3.2 cm. It is shown that the proposed approach permits to retrieve the rain intensity with an error less than 20 % for intensities > 5 mm/h and with an error up to 60 % for light rains (less than 5 mm/h).
Keywords: double frequency sensing, Fredholm integral equation of the first kind, radar, rain intensity, Tikhonov regularization

Manuscript submitted 22.08.2017
PACS 9260
Radiofiz. elektron. 2017, 22(3): 23-32

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