| EXPERIMENTAL STUDY ON SOIL MOISTURE USING DUAL-FREQUENCY MICROWAVE RADIOMETER |
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| 作者姓名： | GUAN Zhi ZHAO Kai SONG Dong-sheng |
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| 作者单位： | 1. Northeast Institute of Geography and Agroecology，Chinese Academy of Sciences，Changchun 130012，P. R. China; 2. Graduate School of Chinese Academy of Sciences，Beijing 100049，P. R. China |
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| 基金项目： | Under the auspices of Knowledge Innovation Program of Chinese Academy of Sciences (No. KZCX2-309) |
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| 摘 要： | 1INTRODUCTIONSoil is the basis of human's living. Soil moisture plays asignificant role in studying the matter and energy ex-changes in global hydrology sphere. The evaporation ofsoil moisture has an influence on the water vapor cycle.Meanwhile soil moisture is also one of the firsthandmeasurable parameters in crop yield estimation and wa-ter resources management (JACKSON et al., 1993). Theinfluence of the interaction of land and atmosphere onsoil moisture can bring about anomalous cli…
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| 关 键 词： | 土壤湿度 双重频率 微波辐射计 亮度 |
| 文章编号： | 1002-0063（2006）01-0083-04 |
| 收稿时间： | 2005-09-27 |
Experimental study on soil moisture using dual-frequency microwave radiometer |
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| GUAN Zhi ZHAO Kai SONG Dong-sheng.EXPERIMENTAL STUDY ON SOIL MOISTURE USING DUAL-FREQUENCY MICROWAVE RADIOMETER[J].Chinese Geographical Science,2006,16(1):83-86. |
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| Authors: | Zhi Guan Kai Zhao Dong-sheng Song |
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| Institution: | (1) Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 130012 Changchun, P. R. China;(2) Graduate School of Chinese Academy of Sciences, 100049 Beijing, P. R. China |
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| Abstract: | An experiment of measuring soil moisture was carried out by using dual-frequency microwave radiometer designed by the authors. The measured data were analyzed by using statistical regression method and the empirical regression model of retrieving soil moisture in L-band and C-band was developed. The soil moisture in a rainfall event was retrieved using the experiential regression model, which is consistent well with the field sampling value. The results show that when soil moisture is lower than 75%, the brightness temperature is linear with soil moisture. However, when soil moisture is higher than 75%, the brightness temperature is not linear with soil moisture, so it is difficult for microwave radiometer to measure the changes of soil moisture. The experiment verifies the effectiveness and feasibility of microwave remote sensing soil moisture. Although this method for linear regression based on the data measured with the radiometer is simple, and has strong adaptability, generally it has only local application value, and lacks universal applicability for different areas and different conditions. |
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| Keywords: | soil moisture dual-frequency microwave radiometer brightness temperature |
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