Method for separating passive microwave remote sensing mixed pixel component soil radiation signals

A passive microwave remote sensing and mixed pixel technology, which is applied in the field of microwave remote sensing, can solve the problems of spatial heterogeneity, mixed pixel surface parameter inversion, low spatial resolution, and large difference in microwave radiation.
CN111983333AActive Publication Date: 2020-11-24自然资源部国土卫星遥感应用中心
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
自然资源部国土卫星遥感应用中心
Publication Date
2020-11-24

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Abstract

The invention relates to the field of microwave remote sensing, and discloses a method for separating passive microwave remote sensing mixed pixel component soil radiation signals. The method comprises the following steps: establishing a mixed pixel multi-angle microwave radiation model by using a microwave radiation transmission model; calculating parameters in the mixed pixel multi-angle microwave radiation model by utilizing vegetation indexes; acquiring the relationship between the soil microwave remote sensing radiation signals at different observation angles by utilizing a bare soil surface emission theoretical model; and resolving the mixed pixel multi-angle microwave radiation model to obtain the microwave emissivity of vegetation-covered soil in the mixed pixels and the microwaveemissivity of bare soil. According to the invention, passive microwave remote sensing multi-angle observation information is fully mined; the microwave remote sensing radiation signals of the mixed pixels are separated, the microwave emissivity of the vegetation covered soil and the emissivity of the bare soil in the mixed pixels are obtained, and the passive microwave remote sensing data processing depth, the surface parameter inversion product applicability and the product precision are improved.
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Description

technical field

[0001] The invention relates to the field of microwave remote sensing, in particular to a method for separating soil radiation signals of passive microwave remote sensing mixed pixel components. Background technique

[0002] Microwave remote sensing is a technology that uses microwave bands to observe target scattering and radiation characteristics. Compared with optical remote sensing methods, microwave has the advantage of working all-weather and all-weather, and has a certain penetration ability to vegetation layers, and can obtain soil information under vegetation coverage. This is also one of the important advantages of microwave remote sensing for vegetation and soil parameter inversion. In addition, the passive microwave remote sensing method has the characteristics of short revisit period and low spatial resolution, which is conducive to obtaining long-term large-scale earth observation data. Therefore, the use of passive microwave remote sensing da...

Claims

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