微波遥感土壤湿度研究进展

发展实用的微波遥感土壤湿度卫星反演算法，以提供区域尺度上的土壤湿度信息，对水文学、气象学以及农业科学研究与应用至关重要。简要分析了主动微波遥感土壤湿度的研究进展情况，重点对被动微波遥感土壤湿度的原理、算法发展及研究趋势进行了详细论述。主动微波具有卫星数据空间分辨率高的特点，随着携载主动微波器的一系列卫星的发射，主动微波遥感土壤湿度将受到重视。被动微波遥感研究历史长、反演算法特别是卫星遥感算比较成熟，是今后区域尺度乃至全球尺度监测土壤湿度的重要手段。

Advances in Study on Microwave Remote Sensing of Soil Moisture

It is important to hydrology, meteorology and agriculture to develop practical satellite remote sensing algorithms for regional soil moisture. Active microwave remote sensing of soil moisture is analyzed briefly. Then the principle, algorithms and research advances and trends of passive microwave remote sensing of soil moisture are reviewed in detail in this paper. With launch of a series of satellites with active microwave sensors, active microwave remote sensing of soil moisture will be emphasized. Passive microwave remote sensing of soil moisture has a long research history, and its retrieval algorithms were developed well, so it is an important tool to retrieve large scale soil moisture information from satellite data in the future. Combination of active and passive microwave remote sensing of soil moisture will be a focus in the future.