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Interference SAR layover area digital elevation model rebuilding method

A digital elevation model and area technology, applied in the field of interferometric SAR topographic mapping, can solve problems such as difficulty in implementation, and achieve the effect of overcoming error propagation

Active Publication Date: 2015-03-25
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, under complex terrain conditions in practice, there may be multiple scattering sources superimposed to form an overlay, which requires a large number of baselines to achieve the purpose of resolving multiple signals. Difficult to achieve in rebuilding

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  • Interference SAR layover area digital elevation model rebuilding method
  • Interference SAR layover area digital elevation model rebuilding method
  • Interference SAR layover area digital elevation model rebuilding method

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0019] It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. And in the accompanying drawings, it is marked for simplicity or convenience. Furthermore, implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values ​​may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values ​​within acceptable error margins or design constraints.

[0020] According to one aspect of the present invention, a...

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Abstract

The invention discloses an interference SAR layover area digital elevation model rebuilding method. According to the method, the characteristic that the frequency of a layover area interferometric phase in the distance direction is opposite to that of areas on the two sides of a layover area is used, the frequency of the interferometric phases of the areas on the two sides of the layover area is estimated, the phase of a boundary of the layover area can be obtained, and accordingly an unwrapping phase inside the layover area is obtained, the DEM rebuilding problem of the layover area is solved, and an effective method is provided for topographic mapping achieved by means of an interference SAR in the layover area.

Description

technical field [0001] The invention relates to the field of interferometric SAR topographic surveying and mapping, in particular to a method for reconstructing a Digital Elevation Model (Digital Elevation Model, DEM for short) in an interferometric SAR overlay area. Background technique [0002] Interferometric Synthetic Aperture Radar (SAR for short) is a technology that uses the phase information of SAR complex data to obtain the elevation information or change information of the earth's surface. There are a wide range of applications, topographic mapping is one of its main applications. However, due to the characteristics of SAR side-looking imaging, under steep terrain or discontinuous surface conditions, SAR images will form overlapping phenomena. In the image area where overlapping phenomenon occurs, the echoes of multiple scattering sources at different heights are superimposed into one resolution unit, which will cause error propagation when the phase is discontinu...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90
Inventor 李芳芳胡东辉仇晓兰丁赤飚
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI