Method and system for designing sliding bunching working mode of high-orbit SAR (Synthetic Aperture Radar)

By calculating the resolution improvement factor of high-rail SAR and the antenna beam sliding speed of the sliding beam mode, and optimizing the system parameters of the sliding beam working mode of high-rail SAR, the problem of failure of design methods in the prior art is solved, and efficient imaging resolution and mapping bandwidth are achieved.

CN119986649AActive Publication Date: 2025-05-13XIAN INSTITUE OF SPACE RADIO TECH
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Patent Information

Application Number
CN202510102448.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-22
Publication Date
2025-05-13
Estimated Expiration
2045-01-22

AI Technical Summary

Technical Problem

The existing sliding beam working mode design method is not suitable for high-orbit SAR, and it is impossible to effectively consider the impact of satellite velocity time variation, earth rotation and azimuth resolution improvement factors.

Method used

By calculating the resolution improvement factor of high-orbit SAR in different orbit satellites, combining the earth's rotation and satellite velocity time-varying, the sliding speed and angular scanning speed of the sliding beam-converging mode antenna beam on the ground is accurately calculated, thereby optimizing the system parameters of the sliding beam-converging mode of high-orbit SAR.

Benefits of technology

The precise design of the high-orbit SAR sliding beam working mode is realized, which solves the problem of failure of traditional methods, and can optimize the imaging resolution and mapping bandwidth based on the influence of satellite speed time variation and earth rotation.

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Abstract

The invention belongs to the field of synthetic aperture radars, and discloses a high-orbit SAR sliding bunching working mode design method and system. The method comprises the steps that 1, resolution improvement factors of a high-orbit SAR in different orbit satellites are calculated; 2, according to resolution improvement factors of the high-orbit SAR in different orbit satellites, calculating a sliding speed of a sliding bunching mode antenna beam on the ground; 3, calculating the antenna beam angle scanning speed according to the sliding speed of the antenna beam in the sliding bunching mode on the ground; and 4, calculating the scanning angle of the antenna beam according to the observation breadth required by the azimuth. According to the method, the problem that a traditional sliding bunching working mode design and calculation method of the high-orbit SAR fails is solved, the influence of satellite speed time varying and earth rotation on the sliding bunching working mode design of the high-orbit SAR is considered, the precision of the working mode design of an SAR system can be greatly improved, and the method has important application prospects.
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