Effects of atmosphere on radio imaging for target detection

Details Effects of atmosphere on radio imaging for target detection Effects of atmosphere on radio imaging for target detection

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988rasc...23..731c&link_type=abstract

Radio Science (ISSN 0048-6604), vol. 23, Sept.-Oct. 1988, p. 731-738. SDIO-supported research.

Physics

1

Atmospheric Attenuation, Atmospheric Effects, Atmospheric Turbulence, Microwave Radiometers, Target Recognition, Millimeter Waves, Rain, Scintillation, Wave Propagation

Scientific paper

Estimates of rain and cloud attenuation versus percentage of time have been made for both relatively wet and dry temperate climates. Attenuation problems are minimal at 10 GHz but increase with frequency. Rain attenuation becomes excessive at 30 GHz for a small fraction of time. Cloud attenuation is also significant at 100 GHz. Water vapor in clear air can often cause more than 10 dB attenuation at 300 GHz. Using the reciprocity theorem, the effects of angle-of-arrival fluctuation on beam spot resolution is found to be negligible. Beam coverage area averaging is expected to reduce cloud-induced signal scintillation to less than about 1 dB.

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