"JOURNAL OF RADIO ELECTRONICS"  N 7, 2012

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STATISTICS IN RADAR DISTANCE IN HYDROMETEORS

 

R. P. Bistrov,  

A. V. Sokolov,

 L .V. Fedorova

Kotel'nikov Institute of Radio-engineering and Electronics of RAS

 

Received July 10, 2012
 

Abstract. We propose a statistical method for estimating the range of radar distance in the troposphere, taking into account the simultaneous effect of attenuation of radio waves in the hydrometeors and the molecular absorption of atmospheric gases. On the basis of this method, calculated  probability distribution of the attenuation of millimeter waves in rains averaged for 23 years according to statistics of rainfalls of varying intensity in the mid-band of  European territory of Russia. Taking into account the calculated statistics of attenuation in hydrometeors (rain, fog, rainy clouds), as well as molecular absorption of water vapor and non-resonant absorption in oxygen, by  methods of mathematical simulation-ray derived probability distribution ranges of  radar distances in five millimeter wave lengths: 8.2, 6, 3.2, 2.5 and 1.42 mm. A comparison of radar distances in  decimeter, centimeter and millimeter wavelengths is given.

Keywords: radar operating distance; rain intensily; absorption of radio waves in water vapor; propability distribution; attenuation in hydrometeors; non-resonant absorbition in oxygen.