微波主被动联合测雨的应用研究

通过雷达-辐射计联合测雨的野外试验,本文用较多的实例对比表明,该方法的精度相对单部雷达测雨方法有明显改善.文章同时分析了联合测雨法的主要误差来源,还指出需要对无雨背景亮温T_(bs)的确定作恰当的选择,以及需对雷达回波垂直结构的不均匀性予以重视,并作适当订正等.本工作对主被动联合遥感降水分布的实际应用将提供有价值的参考.

An Application Study of Rainfall Measurement with Combined Active-Passive Microwave Remote Sensing

Field observations of rainfall measurements with combined Radar- Radiometer System were made and compared with in- situ measurements. It is shown that the accuracy of rainfall measurements with the combined system is obviously better than with a single redar only . The main errors of the combined method are analyzed . It is also indicated that the background brightness temperature should be properly chosen, and the errors caused by the vertical imhomogeneity of Ze have to be corrected. These results will be valuable to the future operational application of rainfall measurements with combined active- passive MW remote sensing .