Near Millimeter Wave (NMMW) Snow Extinction: Atmospheric Sciences Laboratory-MMTRN Model And Data Review

Douglas R. Brown

doi:10.1117/12.932728

30 December 1981 Near Millimeter Wave (NMMW) Snow Extinction: Atmospheric Sciences Laboratory-MMTRN Model And Data Review

Douglas R. Brown

Author Affiliations +

Proceedings Volume 0305, Atmospheric Effects on Electro-Optical, Infrared, and Millimeter Wave Systems Performance; (1981) https://doi.org/10.1117/12.932728
Event: 25th Annual Technical Symposium, 1981, San Diego, United States

Abstract

The Atmospheric Sciences Laboratory developed model MMTRN for millimeter wave extinction and backscatter is presented, with emphasis on the snow extinction model. The literature on millimeter wave snow extinction and backscatter is reviewed including significant results by Oomori et a1⁵, Nishitsuji⁴, Imai et al¹⁰, Babkin et al⁹, and Malinkin et al⁷. From selected data and empirical model is described which employs a K=ar^b relationship, where R, in mm/hr, is the rain equivalent snowrate. Three snow types are included: dry, moist, and wet. Comparison with similar relationship for rain is made showing analogous behavior. The snow backscatter model is presented, with its current deficiencies. The model predictions are compared with independent snow extinction data, and show reasonable agreement. Model deficiencies are identified and include: (1) lack of snow backscatter measurements, (2) insufficient snow extinction data above 50 GHz.

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Douglas R. Brown "Near Millimeter Wave (NMMW) Snow Extinction: Atmospheric Sciences Laboratory-MMTRN Model And Data Review", Proc. SPIE 0305, Atmospheric Effects on Electro-Optical, Infrared, and Millimeter Wave Systems Performance, (30 December 1981); https://doi.org/10.1117/12.932728

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KEYWORDS

Data modeling

Extremely high frequency

Backscatter

Atmospheric modeling

Signal attenuation

Fiber optic gyroscopes

Refractive index

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