Method of extracting soil water content information based on data of fully polarimetric radar
A technology of radar data and soil water content, applied in the direction of using re-radiation, radio wave reflection/re-radiation, measuring devices, etc., can solve problems such as roughness and terrain undulations, soil water content interference, etc., to achieve simple algorithms, rich information, The effect of reducing interference
Inactive Publication Date: 2017-04-19
BEIJING RES INST OF URANIUM GEOLOGY
View PDF3 Cites 7 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, most of the current algorithms are based on single-polarization radar data. Whether it is an empirical model, a semi-empirical model, or a physical model, it is based on the relationship between the radar backscatter coefficient and the soil moisture content. However, due to the radar backscatter Highly sensitive to the geometric structure of the ground surface, the roughness of the ground and topographic relief will interfere with the retrieved soil water content information
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0022] like figure 1 As shown, a method for extracting soil water content information using fully polarized radar data provided by the present invention, the method specifically includes the following steps:
[0023] Step (1) Preprocess the data of different polarization modes of the fully polarimetric radar data respectively.
[0024] Step (1.1) Focus processing on the original (RAW format) data of the radar system to obtain the radar SLC image
[0025] Use radar data processing software (such as SARscape) to open the data file, and perform focusing processing on the RAW format raw data () of the radar system to obtain radar single-look replica data (SLC data).
[0026] Taking the full-polarization Alos-2 radar data in the Ulunguhe area of Xinjiang as an example, the data file opened above is the Alos-2 satellite launched by Japan in 2014...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention belongs to the field of remote sensing and analysis for the data of a radar and particularly discloses a method of extracting the soil water content information based on the data of a fully polarimetric radar. The method comprises the following steps of (1) respectively pre-processing the data of a fully polarimetric radar, wherein the data of the radar are presented in different polarization modes; (2) synthesizing the RGB colors of a radar image processed during the step (1); (3) subjecting the RGB color image obtained in the step (2) to calculation to obtain a soil relative water content information graph. Based on the method, the echo data of the fully polarimetric radar in different polarization modes can be calculated and processed, and then the relative water content of the soil can be obtained. Meanwhile, the information of the water-enriched zone of the soil is extracted, so that the method can be used for figuring out the water-finding direction in agricultural production and geological fields.
Description
technical field [0001] The invention belongs to the field of radar data remote sensing analysis, and in particular relates to a method for extracting soil water content information by using full polarization radar data. Background technique [0002] Soil moisture refers to the moisture content of the unsaturated layer of the soil (also known as the seepage layer), which can reflect the degree of drought on the shallow surface in different regions, and the rapid soil moisture information in large areas can not only guide agricultural production and water conservancy irrigation, It can also provide a reference for geological disaster monitoring and forecasting, and at the same time, it can also provide help for the prospecting of some minerals (such as sandstone-type uranium ore, gypsum salt). [0003] The inversion of spatial and temporal distribution information of soil moisture based on satellite remote sensing technology has always been one of the hotspots in remote sensin...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/89
CPCG01S13/89
Inventor 孟树叶发旺张川刘洪成郭帮杰
Owner BEIJING RES INST OF URANIUM GEOLOGY