Airborne interferometric synthetic aperture radar complex scene elevation inversion method and system

Abstract

The invention provides an airborne interferometric synthetic aperture radar complex scene elevation inversion method and system. The method comprises the steps: acquiring multiple single-view compleximage pairs of the same complex scene to be detected at opposite angles in a flight mode; respectively obtaining coordinate information of each single-view complex image pair under different coordinate systems according to all the single-view complex image pairs, wherein each piece of coordinate information contains one piece of corresponding first height information; respectively mapping each piece of coordinate information of all the single-view complex image pairs to coordinate transformation under the same coordinate system to obtain each piece of transformed coordinate information and second height information corresponding to each piece of transformed coordinate information after the first height information is transformed; performing gridding processing on each piece of coordinate information after coordinate conversion and the second height information to generate each piece of coordinate information containing third height information; and according to a preset fusion strategy, performing pixel fusion processing on the plurality of pieces of coordinate information containing the third height information, thus generating height inversion information of the to-be-detected complex scene.

Description

technical field [0001] The invention relates to the field of airborne interferometric synthetic aperture radar, in particular to an elevation inversion method and system for an airborne interferometric synthetic aperture radar complex scene. Background technique [0002] Elevation inversion of complex scenes is a key problem to be solved by airborne interferometric synthetic aperture radar. Elevation inversion. At the same time, low-coherence areas such as overlapping and shadows are more prominent in complex scenes, which has caused great difficulties in the interferometric processing step. Traditional interferometric processing cannot obtain effective elevation data in low-coherence areas, which easily causes the lack of elevation data in the scene. [0003] The current method of dealing with the height inversion of complex scenes mainly uses a single flight mode, then performs traditional interferometric processing for height inversion, and then directly interpolates the...

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Problems solved by technology

) conditions, conventional interferometric processing cannot satisfy high-precision elevation inversion

At the same time, low-coherence areas such as overlap and shadow are more prominent in complex scenes, which causes great difficulties in the interference processing step. Traditional interference processing cannot obtain effective elevation data in low-coherence areas, which easily causes the lack of elevation data in the scene.

[0003] The current method of dealing with the height inversion of complex scenes mainly uses a single flight mode, then performs traditional interferometric processing for height inversion, and then directly interpolates the height information of the low-coherence area, resulting in low height accuracy of the low-coherence area. Unable to meet the needs of high-precision geographic surveying and mapping

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