Regional network plane adjustment method for spaceborne synthetic aperture radar image

A synthetic aperture radar and area network technology, applied in photogrammetry/video measurement, radio wave reflection/re-radiation, instruments, etc., can solve problems that are difficult to meet generalized unified processing procedures and restrict large-scale practical applications, etc. question

Active Publication Date: 2019-05-03
WUHAN UNIV
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Problems solved by technology

[0003] The traditional space-borne SAR image processing is mainly based on the range-Doppler model (hereinafter referred to as the R-D model). However, due to the different satellite platforms and working modes, the use of the R-D model in actual production work needs to be based on different satellite platform parameters. Corresponding settings are difficult to meet the needs of a generalized and unified processing process, which restricts its large-scale practical application

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  • Regional network plane adjustment method for spaceborne synthetic aperture radar image
  • Regional network plane adjustment method for spaceborne synthetic aperture radar image
  • Regional network plane adjustment method for spaceborne synthetic aperture radar image

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Embodiment Construction

[0092] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0093] like figure 1 As shown, the present invention provides a method for block plane adjustment of spaceborne synthetic aperture radar images, comprising the following steps:

[0094] Step 1. Read the SAR image, use matching technology or manual collection to select the same-named point in the overlapping area of ​​adjacent spaceborne SAR images as the connection point between the images, and at the same time, puncture the control points and The image square coordinates of the checkpoints, among them, the principle of control point layout should be distributed in the four corners of the survey area as much as possible; organize the RPC parameter file format in line with international standards; at the same time organize the coordinate information of connection points, control points and checkpoints and save them as correspon...

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Abstract

The invention discloses a regional network plane adjustment method for a spaceborne synthetic aperture radar image. The method is characterized in that an original R-D model is replaced by an RPC model, separate parameter settings for different satellite platforms are avoided, unified processing of various image types is achieved, improvement of productivity in actual production is facilitated, moreover, the regional network adjustment technology is utilized to compensate geometric positioning inconsistency of an SAR image, accuracy of joint edges of overlapped regions between final result images and absolute positioning accuracy among georeferences can satisfy accuracy requirements, and accuracy and reliability of product data in actual production are guaranteed, in addition, after conversion to the RPC model, a digital elevation model is utilized to constrain the elevation direction of the forward intersection process, a problem of elevation solution abnormality is solved, and reliability of the entire result is guaranteed.

Description

technical field [0001] The invention relates to the technical field of photogrammetry, in particular to a block network plane adjustment method for spaceborne synthetic aperture radar images. Background technique [0002] Synthetic Aperture Radar (hereinafter referred to as SAR) is one of the important development directions of modern radar technology. As one of its application platforms, spaceborne SAR is rapidly expanding and deepening its application fields, including environmental monitoring, land mapping, natural resource detection, disaster management, and oceanographic mapping. Compared with optical and infrared imaging, spaceborne SAR has unique advantages such as multi-polarization, all-day and all-weather imaging. Recently, a new generation of high-resolution space-borne SAR satellites has been successfully launched at home and abroad, and the performance of its imaging system has been continuously improved, and the application value of space-borne SAR image photo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90G01C11/00
Inventor 张过汪韬阳蒋博洋
Owner WUHAN UNIV
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