Study on a unified signal processing algorithm for spaceborne precipitation radar

星载降水雷达统一信号处理算法研究

• 批准号: 06640559
• 负责人: SATO Toru
• 金额: $ 1.22万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06640559/
• 关键词: TRMM; spaceborne radar; dropsize distribution; radar signal processing; MU radar; remote sensing

The MU radar of Japan is one of important candidates for providing accurate ground truth for the TRMM precipitation radar. It can provide the dropsize distribution data together with the background atmospheric wind data with high accuracy and high spatial resolution.Special observation scheme developed for TRMM validation using the MU radar is described, and preliminary results from its test experiment are shown. The high-resolution MU radar data are also used in numerical simulations to validate the rain retrieval algorithm for the TRMM PR data anlysis. Among known sources of errors in the rain retrieval, the vertical variability of the dropsize distribution and the partial beam-filling effect are examined in terms of their significance with numerical simulations based on the MU radar data.It is shown that these factors may seriously affect the accuracy of the TRMM rain retrieval, and that it is necessary to establish statistical means for compensation. However, suggested means to improve the conventional alpha-adjustment method require careful treatment so that they do not introduce new sources of errors.

日本的MU雷达是为TRMM降水雷达提供精确地面实况的重要候选雷达之一。它能提供高精度、高空间分辨率的雨滴谱数据和背景大气风场数据，本文介绍了利用MU雷达验证TRMM的特殊观测方案，并给出了初步的试验结果。高分辨率MU雷达数据也被用于数值模拟，以验证TRMM PR数据分析的降雨反演算法。在已知的降水反演误差源中，本文利用MU雷达资料，通过数值模拟研究了雨滴谱垂直变化和部分波束填充效应对降水反演精度的影响，指出这些因素严重影响TRMM降水反演的精度，有必要建立统计补偿方法。然而，改进传统α调整方法的建议方法需要仔细处理，以便它们不会引入新的误差源。

项目成果

T.Sato, et al.: "Validation and Ground Truth for TRMM Precipitation Radar Using the MU Radar" IEICE Trans.Commun.Vol.E79-B (in press). (1996)

T.Sato 等人：“使用 MU 雷达进行 TRMM 降水雷达的验证和地面实况”IEICE Trans.Commun.Vol.E79-B（正在印刷中）。

佐藤亨: "航空機搭載レーダとMUレーダを用いたTRMM降雨レーダの観測制度の検討" 電子情報通信学会技術研究報告. SANE94-63. 41-48 (1994)

佐藤彻：“使用机载雷达和MU雷达的TRMM降雨雷达观测系统的研究” IEICE技术研究报告41-48（1994）。

T. Sato: "Simultaneous Observation Plan of the MU Radar with Airborne/Spaceborne Precipitation Radars" Proc. 7th MST Radar Workshop. (印刷中). (1996)

T. Sato：“MU 雷达与机载/星载降水雷达的同步观测计划”第 7 届 MST 雷达研讨会（1996 年）。

T. Sato: "Simultaneous observation of raindrop size distribution by VHF and L-band Doppler radars" Proc. IEEE AP-S Intl. Symp.1614-1617 (1994)

T. Sato：“VHF 和 L 波段多普勒雷达同时观测雨滴尺寸分布”Proc。

T.Teraoka, T.Sato, et al: "An accuracy evaluation of TRMM precipitation radar using airborne radar and the MU radar" Tech.Rep.IEICE. 41-48 (1994)

T.Teraoka、T.Sato 等人：“使用机载雷达和 MU 雷达对 TRMM 降水雷达进行精度评估”Tech.Rep.IEICE。