Microwave emission of raining clouds
Buettner, K.J.K. (1965). Microwave emission of raining clouds, in: Ewing, G.C. (Ed.) Oceanography from Space: Proceedings of Conference on the Feasibility of Conducting Oceanographic Explorations from Aircraft, Manned Orbital and Lunar Laboratories, held at Woods Hole, Massachusetts, 24-28 August 1964. pp. 287
In: Ewing, G.C. (Ed.) (1965). Oceanography from Space: Proceedings of Conference on the Feasibility of Conducting Oceanographic Explorations from Aircraft, Manned Orbital and Lunar Laboratories, held at Woods Hole, Massachusetts, 24-28 August 1964. Woods Hole Oceanographic Institution: Woods Hole. XXI, 469 pp., meer
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| Abstract |
Rain showers attenuate radio signals of cm microwaves in a roughly known manner; the attenuation is due to scattering and absorbtion. The ratio of these two effects is known from D.Deirmendjan's application from the Mie theory to a polydisperrse cloud. Accordingly, heavy rain clouds for λ>1,4 cm emiut substantially more that the ocean for the same λ. Inclusion of the unknown, but likely, effect of multiple scattering increases the signal difference between ocean and a cloud. The counteracting temperatures effect is small. It should therefore be possible to discriminate between raining clouds and ocean. Optima wavelength seems to be 1,6 cm. A passive system receiver could also be used to discover sea state, icebergs, and openings in Arctic ice fields. |
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