Amplitude Statistics of Ground Clutter from Rolled Topography Observed by an X-band Radar

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  • Xバンドレーダで観測した起伏のある地形のグランドクラッタの統計的性質
  • Xバンドレーダ デ カンソク シタ キフク ノ アル チケイ ノ グランドクラッタ ノ トウケイテキ セイシツ

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<p>We have observed ground clutter from rolled topography using an X-band radar with a frequency of 9.41GHz, a beamwidth of 1.0°, a pulsewidth of 0.5µs, and a pulse-repetition frequency of 1,600Hz. To investigate such ground clutter amplitude statistics, we introduce a compound distribution and the Akaike Information Criterion (AIC). We have found that the ground clutter amplitude obey the compound log-Weibull distribution with the shape parameters of c1 = 9.19, c2 = 12.37 for entire data and the compound log-normal, Weibull, log-Weibull, and gamma distributions with the shape parameters of σ1 = 0.544, σ2 = 0.139, c1 = 2.94 to 3.05, c2 = 3.15 to 3.48, c1 = 8.23 to 9.61, c2 = 12.81 to 59.60, and α1 = 4.32 to 4.99, α2 = 24.56 to 70.19, respectively, for data within the beam width of an antenna. The number of the smallest AIC (MAIC) of the compound log-normal, Weibull, log-Weibull, and gamma distributions are 1, 2, 17, and 3, respectively, from 23 range sweep numbers.</p>

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