Passive microwave soil moisture reality check method based on multi-source data type

• Main Authors: Wang Chunmei, Wei Xiangqin, Fang Li, Xie Yong, Yu Tao, Li Juan, Gu Xingfa, Zhan Yulin, Sun Yuan
• Format: Patent
• Language: Chinese; English
• Published: 24.08.2016
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTEDFOR SPECIFIC APPLICATION FIELDS; PHYSICS

The invention provides a passive microwave soil moisture reality check method based on a multi-source data type. According to the method, a high-precision soil moisture digital map is constructed with a down-scaling method and a hierarchical optimization sampling method based on MODIS (Moderate Resolution Imaging Spectroradiometer) data and ground measured data; a passive microwave remote sensing soil moisture product reality check method based on the multi-source data type is built; and reality check and evaluation of a domestic FY-3 soil moisture product are further performed. Through adoption of the passive microwave soil moisture reality check method, a remote sensing reality check subject theory and method can be enriched; the accuracy of a low-resolution soil moisture product can be increased; and the application value of the low-resolution soil moisture product in relevant industrial fields is increased. 本发明是种基于多源数据类型的被动微波土壤水分真实性检验方法，该方法是基于MODIS数据和地面实测数据，利用降尺度方法和分层优化采样方法，构建高精度土壤水分数字地图，建立种基于多源数据类型的被动微波遥