Multi-phase center distribution design method and device for circular scanning ground-based SAR

Abstract

The invention discloses a multi-phase center distribution design method and device for a circular scanning ground-based SAR, wherein the method includes: obtaining the bandwidth frequency ratio parameter and the phase center number parameter of the circular scanning ground based SAR; according to the bandwidth frequency ratio parameter and the phase center Quantitative parameters, as well as a pre-established phase transition diagram, determine the minimum side lobe data of the point spread function of the circumferential scanning ground-based SAR, wherein the phase transition diagram is pre-established according to the point spread function of the circumferential scanning ground-based SAR and grid space parameters; according to the The minimum side lobe data of the point spread function is used to determine the spectrum distribution data of the circular scanning ground-based SAR; according to the spectrum distribution data and observation geometry, the multi-phase center distribution of the circular scanning ground-based SAR is designed. The invention effectively solves the problem of high side lobes in imaging and ensures the imaging quality.

Description

technical field [0001] The invention relates to the technical field of ground-based SAR three-dimensional imaging, in particular to a method and device for designing a multiphase center distribution of a circular scanning ground-based SAR. Background technique [0002] In recent years, Ground-based Synthetic Aperture Radar (GBSAR) has been used in landslide monitoring, volcano monitoring, glacier monitoring, open pit monitoring, bridge and building monitoring and other fields. However, the traditional linear orbit GBSAR can only obtain two-dimensional images and one-dimensional deformation, and there is a problem of "overlapping" in the terrain relief area, which is not suitable for complex terrain, and cannot obtain the three-dimensional terrain information of the monitoring scene. [0003] Circular scanning ground-based SAR is a new system of ground-based SAR with three-dimensional imaging capability. Compared with the traditional linear orbit ground-based SAR, the circul...

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Problems solved by technology

[0005] An embodiment of the present invention provides a design method for multi-phase center distribution of circular scanning ground-based SAR, which is used to design the multi-phase center distribution of circular scanning ground-based SAR, solve the problem of high side lobes in imaging, and ensure imaging quality. The method includes :

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