Distributed GEO SAR three-dimensional deformation inversion multi-angle selection method and device
A three-dimensional deformation and distributed technology, applied in the field of radar, can solve the problems of multiple observation angles, the failure of the three-dimensional deformation inversion model and the accuracy analysis method, etc., and achieve the effect of improving the accuracy of the three-dimensional deformation inversion.
Pending Publication Date: 2021-12-10
BEIJING INSTITUTE OF TECHNOLOGYGY +2
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] However, unlike single-base SAR, distributed GEO SAR faces the following problems in 3D deformation inversion: (1) The transceiver platform is separated, and the 3D deformation inversion model and precision analysis method of single-base SAR are invalid; (2) The system observation There are many angles, and it is impossible to select the optimal observation angle for 3D deformation inversion
However, the existing deformation inversion methods cannot solve the above problems
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
[0036] first combine figure 1 Describe the flow of a multi-angle selection method for distributed GEO SAR three-dimensional deformation inversion according to an embodiment of the present invention. like Figure 1-2 As shown, the method includes the following steps:
[0037] Step S101: Acquire the speed, coordinates, and scene coordinates within the spatial range that the distributed GEO SAR system irradiates the observation target; the scene center is denoted as P 0 , according to the scene center P 0 Calculates the unit vector for the three directions due north, due east and vertical Select any three observation angles to obtain the equivalent aperture center position S of the differential interferometry at the center time of the orbit aperture corresponding to each observation angle An , calculate the bistatic angle β at the center of the orbital aperture n and the unit vector of the slant distance from the GEO satellite to the target Obtain a three-dimensional defor...
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 provides a distributed GEO SAR three-dimensional deformation inversion multi-angle selection method and device. The method comprises the steps of: obtaining the speed, coordinates and scene coordinates of a distributed GEO SAR system in a spatial range of full illumination of an observation target, and obtaining a three-dimensional deformation model coefficient matrix; obtaining a covariance matrix of phase error through interferogram phase variances at all observation angles; according to the three-dimensional deformation model coefficient matrix and the covariance matrix of phase error, calculating the minimum positioning precision coefficient of the measurement precision coefficient of the distributed GEO SAR system for the observation target in the full irradiation time period; and based on the distributed GEO SAR system, carrying out optimal combination selection on the measurement precision coefficient and the minimum positioning precision coefficient of the observation target in the full irradiation time period. According to the scheme, the earth surface three-dimensional deformation inversion precision can be effectively improved.
Description
technical field [0001] The invention relates to the field of radar, in particular to a multi-angle selection method and device for distributed GEO SAR three-dimensional deformation inversion. Background technique [0002] Geosynchronous Synthetic Aperture Radar (GEOSAR) operates at an orbital altitude of about 36,000km, with fast revisit capability and continuous coverage. However, for the GEO SAR with the sub-satellite point of medium inclination and the "Xiao 8" trajectory, it faces the target scattering time decorrelation and atmospheric disturbance decorrelation in the application of deformation inversion, and the angle difference between the east and west directions is small, and the three-dimensional The deformation inversion performance is poor. On the basis of single-star GEO SAR, the distributed GEO SAR composed of passively received satellites can overcome the above deficiencies, and realize the three-dimensional deformation measurement of emergency response in th...
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 IPC IPC(8): G01S13/90
CPCG01S13/9023G01S13/9058G01S13/9094
Inventor 胡程谢煜辉董锡超陈志扬李元昊
Owner BEIJING INSTITUTE OF TECHNOLOGYGY