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Method for inversing soil moisture content from AMSR-E (Advanced Microwave Scanning Radiometer-EOS) data

A technology of AMSR-E and soil moisture, which is applied in the direction of using microwave to test the moisture content, can solve the problem that it is difficult to meet the needs of drought monitoring

Inactive Publication Date: 2011-01-05
INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI +1
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Problems solved by technology

[0010] The purpose of the present invention is to provide a method for soil moisture inversion from remote sensing data AMSR-E, to overcome the complexity of the existing soil moisture monitoring inversion method and difficult to meet the needs of drought monitoring, to enrich domestic researchers for passive microwave remote sensor development The product algorithm provides a reference for soil moisture retrieval methods for passive microwave sensors on 100 satellites (especially Fengyun-3 satellites) that my country plans to launch before 2020, and can further improve the accuracy of soil moisture retrieval in the current business operations of the Ministry of Agriculture. Improve drought monitoring and crop yield estimation accuracy

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  • Method for inversing soil moisture content from AMSR-E (Advanced Microwave Scanning Radiometer-EOS) data
  • Method for inversing soil moisture content from AMSR-E (Advanced Microwave Scanning Radiometer-EOS) data
  • Method for inversing soil moisture content from AMSR-E (Advanced Microwave Scanning Radiometer-EOS) data

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Embodiment Construction

[0044] Here we use the AMSR-E image data of the 5 scenes in mainland China on February 1, 2009 for specific inversion. This method mainly includes two steps, as Figure 6 .

[0045] The first step is to read in the data of each frequency of AMSR-E, obtain the parameters from the header file, and convert the DN value to the brightness temperature;

[0046] The second step is to use formula 5 to calculate the brightness temperature index;

[0047] The third step, on the basis of the second step, use formula 6 to calculate the soil moisture;

[0048] In the fourth step, the soil moisture estimated in the third step is geometrically corrected and combined, and the estimated soil moisture result is Figure 7 shown;

[0049] The fifth step is the verification and analysis of the distribution of the estimation results. According to the national meteorological department and local drought reports in February 2009, the inversion results are basically consistent with the national dro...

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Abstract

The invention relates to a method for inversing soil moisture content from AMSR-E (Advanced Microwave Scanning Radiometer-EOS) data, which can be used for the remote sensing application departments of monitoring weather and environment, managing land, monitoring a drought and a crop growing situation, monitoring disasters, and the like. The method comprises the following four steps of: firstly, simulating the most part of situations on the earth surface and establishing a database by using a theoretical model; secondly, establishing an inverse algorithm by using a simulation database; thirdly, carrying out the inverse calculation of passive microwave data AMSR-E; and fourthly, carrying out proper evaluation, analysis and modification by using observation data of a meteorological department, thereby increasing the precision and the applicability of the algorithm. The method for inversing soil moisture content from the AMSR-E data can be used for the departments of forecasting weather, monitoring environment, agricultural situations and disaster situations, and the like. The microwave radiation frequency arrangement carried by a Fengyun 3 satellite of China is basically similar to the AMSR-E, and the invention can be applied to the Fengyun 3 satellite of China and a microwave radiometer transmitted by China in the future after being modified.

Description

technical field [0001] The invention relates to a method for retrieving soil moisture by using ground thermal radiation information obtained by a passive microwave sensor AMSR-E on an earth observation satellite. The method overcomes the shortcomings of asynchronous parameter acquisition, complexity and impracticality in previous inversion methods. It can be applied in remote sensing departments such as meteorology, agriculture, environmental monitoring and drought monitoring. Background technique [0002] Soil moisture is an important parameter in the study of hydrology, meteorology, agriculture and environmental hazards. With the development of microwave sensor technology, the in-depth understanding of the surface microwave radiation mechanism, and the improvement of inversion models and algorithms, passive microwave remote sensing monitoring of soil moisture will have increasingly broad application prospects. Large-scale soil moisture variability is important for buildin...

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Application Information

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IPC IPC(8): G01N22/04
Inventor 毛克彪宋亮王建明高春雨黄青邹金秋郭同军卫炜
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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