Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/36222
Title: Vertical and slant path rain attenuation measurements by microwave radiometer at 11 GHz
Authors: Raina, M K
Issue Date: Dec-1991
Publisher: NISCAIR-CSIR, India
Abstract: Measurements of rain attenuation at 11 GHz have been made at vertical incidence and on a slant path with antenna looking at 10° elevation. The study involves simultaneous and instant measurement of rainfall rate by the opto-electronic fast response 10 s raingauge and of attenuation by microwave radiometer. The measurements show that for the identical rainfall rates of 10, 50 and 100 mm/h, the attenuations at the vertical and slant paths are 0.7 and 1.1 dB, 3.8 and 5.5 dB, and 7.5 and 11 dB, respectively. The long term cumulative distribution sows that for 0.01% of time of the year, the attenuations exceeded at the vertical incidence and on the slant path are 7.5 and 9.6 dB, respectively. The rainfall rate for the same percentage of time exceeded 75 and 125 mm/h, respectively. The rainfall for the same percentage of time exceeded 75 and 125 mm/h, respectively. Correlation characteristics of attenuation at vertical and on slant path are presented. Comparison has also been made between the measured attenuation statistics obtained by using radiometric technique and measurements at different places around the world.
Page(s): 405-408
URI: http://nopr.niscair.res.in/handle/123456789/36222
ISSN: 0975-105X (Online); 0367-8393 (Print)
Appears in Collections:IJRSP Vol.20(6) [December 1991]

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