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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Predicted Effects of Nonuniform Beam Filling on GPM Radar Data
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Predicted Effects of Nonuniform Beam Filling on GPM Radar Data

机译:光束不均匀填充对GPM雷达数据的预测影响

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摘要

The Global Precipitation Measurement mission (GPM) will carry the first dual-frequency spaceborne radar (DPR) for rainfall observation. We use dual-frequency airborne radar data to simulate observations at GPM DPR resolution and frequencies and to investigate errors due to nonuniform beam filling effects. Errors at Ku-band are similar to those found in previous studies. Errors in the Ka-band path-integrated attenuation and near-surface reflectivity are larger than at Ku-band. Errors in rain-top reflectivity, where attenuation is neglected, are smaller at Ka-band than at Ku-band because the Ka-band $Z$– $R$ relation is closer to being linear.
机译:全球降水测量任务(GPM)将携带第一台用于观测降雨的双频星载雷达(DPR)。我们使用双频机载雷达数据来模拟在GPM DPR分辨率和频率下的观测结果,并研究由于光束填充效果不均匀而引起的误差。 Ku波段的误差与以前的研究相似。与Ku波段相比,Ka波段路径积分衰减和近表面反射率的误差更大。忽略衰减的雨顶反射率误差在Ka波段比Ku波段要小,因为Ka波段$ Z $ – $ R $的关系更接近线性。

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