Ground-based radar glacier flow velocity high-precision monitoring algorithm and system
A ground-based radar, high-precision technology, applied to radio wave measurement systems, mapping and navigation, measurement devices, etc. problems, to achieve the effect of enhancing applicability and reducing work intensity
Active Publication Date: 2022-02-11
SOUTHWEST JIAOTONG UNIV +1
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[0005] In view of the problems in the prior art that glacier surface deployment and control are difficult, global high-precision conversion is difficult to control, and glacier surface monitoring target points are difficult to accurately track and identify, the present invention provides a ground-based radar glacier flow rate high-precision monitoring algorithm and system, and its purpose is to: overcome It is difficult to track and identify monitoring target points in the complex scattering environment of glacier surface, realize the precise measurement of coordinates and dynamic extraction of thematic information of glacier flow velocity
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[0036] A ground-based radar glacier flow rate high-precision monitoring algorithm, comprising the following steps:
[0037] Step S1: Combining the UAV aerial survey data and the layout data of ground-based radar monitoring sites, establish a conversion model from the GB-SAR two-dimensional coordinate system to the three-dimensional coordinate system, and realize the unification of the framework of the GB-SAR line-of-sight monitoring system and the target three-dimensional system ;
[0038]Step S2: High-precision geocoding of GB-SAR monitoring data based on solution space search and matching method to realize accurate measurement of coordinates of monitoring target points;
[0039] Step S3: Based on the dynamic extraction of glacier flow velocity information based on GB-SAR high-precision monitoring data, the tracking and identification of monitoring target points in the glacier surface object scattering environment is completed.
[0040] The concrete steps of described step S...
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The invention discloses a ground-based radar glacier flow velocity high-precision monitoring algorithm and system, and aims to solve the problems that global high-precision conversion is difficult to control and control points are difficult to distinguish in a traditional concept technology. The method comprises: S1, by combining the layout data of unmanned aerial vehicle aerial survey and ground-based radar monitoring stations, establishing a GB-SAR two-dimensional coordinate system to three-dimensional coordinate system conversion model so as to realize framework unification of a GB-SAR sight line direction monitoring system and a target three-dimensional system; S2, achieving precise measurement of coordinates of a monitoring target point based on GB-SAR monitoring data high-precision geocoding of a solution space search matching method; and S3, dynamically extracting glacier flow velocity information themes based on GB-SAR high-precision monitoring data, completing tracking and identification of monitoring target points in a glacier ground object scattering environment, and achieving the technical effects of accurate measurement of coordinates and dynamic extraction of glacier flow velocity themes.
Description
technical field [0001] The invention belongs to the technical field of ground-based radar coding, and in particular relates to a high-precision monitoring algorithm and system for glacier flow velocity by ground-based radar. Background technique [0002] Dynamic monitoring of glacier flow rate can effectively reflect the dynamic evolution law of glaciers, and reveal the degradation status of glaciers accordingly. It is one of the important measures for glacier resource utilization, climate change risk control and related disaster early warning. highly valued. At present, the technical approach for dynamic monitoring of glacier flow velocity is mainly based on the interpretation and analysis of optical remote sensing images, which is difficult to accurately quantify the glacier sports field, and is severely restricted by climatic conditions. Especially in the cloudy and foggy areas in southeast Tibet, optical remote sensing data is scarce. Ground-based radar (GB-SAR) has ou...
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IPC IPC(8): G01S13/86G01S13/58G01S13/66G01C13/00
CPCG01S13/86G01S13/58G01S13/66G01C13/00
Inventor 刘国祥谢毅徐正宣张瑞张广泽王栋王科蔡嘉伦贾洪果王晓文
Owner SOUTHWEST JIAOTONG UNIV