Multi-dimensional synthetic aperture radar registration method and device

Abstract

The invention discloses a multi-dimensional synthetic aperture radar registration method and device, which are used for carrying out consistency processing on signals in an imaging process to realize multiband consistency imaging. The method comprises the following steps: selecting a reference wave band, and obtaining distance offset and azimuth offset of each wave band relative to the reference wave band based on the antenna phase center position of each wave band, a reference track and a reference drift angle of each wave band; performing range direction signal resampling, range direction frequency spectrum band-pass filtering and range direction signal interception to obtain processed range pulse pressure data; carrying out azimuth resampling, frequency spectrum band-pass filtering and azimuth signal interception to obtain a processed SAR image; checking the registration precision between each wave band image and the reference wave band image by using the scaling points; and if the registration precision is greater than one pixel, correcting the distance offset and azimuth offset of each non-reference wave band image relative to the reference wave band by using the scaling points.

Description

technical field [0001] The invention relates to the technical field of multi-band synthetic aperture radar data processing, in particular to a multi-dimensional synthetic aperture radar registration method and device. Background technique [0002] Synthetic Aperture Radar (SAR), as an active remote sensing technology, has the ability of all-day and all-weather earth observation, and has important application potential in the fields of natural resource monitoring, topographic mapping, forest biomass estimation and so on. With the continuous development of SAR technology, SAR has expanded from single-polarization to multi-polarization, and from single-band to multi-band, and systems with simultaneous observation capabilities in multiple dimensions such as multi-band and multi-polarization continue to emerge. For example, the German F-SAR has the ability to acquire full-polarization data in five bands of P, L, S, C, and X; the domestic multi-dimensional SAR has the ability to s...

AI Technical Summary

Problems solved by technology

At present, the research on registration is mainly aimed at the same band. Due to the difference in scattering characteristics and geometric differences of ground objects in different bands, the registration technology directly starting from the image often fails to match, while the registration technology processed from the imaging process is limited to a certain range. One band, only the antenna phase center is different, and the registration accuracy is affected by DEM accuracy and error compensation approximation processing

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