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- W2132497859 abstract "A brief review is given of the current state of knowledge of atmospheric propagation and clutter characteristics at frequencies in the range of 35 GHz to 95 GHz. The performance of a 35-GHz and a 95-GHz air-to-ground fire control system are evaluated for a realistic environment based on the current state of knowledge. Representative atmospheric attenuation values of clear air, 4-mm/hr rainfall, and 10-mm/hr rainfall at 35 and 95 GHz are summarized. Figures giving compiled values of radar reflectivity data at 35 and 95 GHz for grass, crops, and snow-covered ground as a function of depression angle (measured from the horizontal) are also presented. The two radar systems were evaluated in terms of their ability to detect a 40-m/sup 2/ target in the presence of atmospheric attenuation and three types of clutter. Generally, the 35-GHz system performed better in terms of signal-to-noise ratio performance and in signal-to-clutter ratio performance for light clutter. In heavy clutter, the 95-GHz system performed significantly better than the 35-GHz system. For 300-m altitude and refrozen snow clutter background, neither system developed a large enough signal-to-clutter ratio to detect the target reliably. >" @default.
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- W2132497859 date "2003-01-06" @default.
- W2132497859 modified "2023-09-24" @default.
- W2132497859 title "MMW system trade-offs" @default.
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- W2132497859 doi "https://doi.org/10.1109/nrc.1988.10920" @default.
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