Inversion of vertical rainfall field based on earth-space links
Authors:
- 1 January 2020
- journal article
- research article
- Published by Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences in Acta Physica Sinica
- Vol. 69 (2) , 024301-024301-11
Abstract
在分析星地链路几何结构及传播模型的基础上, 研究基于联合代数重建技术的星地链路反演二维垂直降雨场的方法. 利用实测降雨资料构建3类降雨场, 并搭建3条17 GHz垂直极化星地链路进行数值仿真. 实验结果表明: 单星地链路无法实现二维垂直降雨场的重构, 反演场与真实场的相关系数分别为0.556, 0.504和0.364; 基于双星地链路的反演结果和真实场的相关系数均高于0.98, 平均偏差分别为0.122, 0.159和0.537 mm/h, 欧式距离均低于0.9 mm/h, 熵的相对误差均小于1.6%, 基本实现了二维垂直降雨场的反演; 三星地链路的应用进一步提升了反演精度, 相关系数接近于1, 能够精准重构降雨场. 实验结果验证了基于星地链路的垂直降雨场反演方法的可行性、准确性和有效性. 星地链路的架设和维护简单, 探测降雨范围广, 易于在高原、山区、海岛等传统地面观测资料缺失的地区使用, 可以作为已有降水测量手段的补充.Keywords
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