Layout method of single ground calibration station for geosar phase calibration

A ground-based calibration and phasing technology, applied in the direction of utilizing re-radiation, special data processing applications, radio wave reflection/re-radiation, etc., can solve the problem of lack of universality and not meeting the requirements of GEOSAR long synthetic aperture imaging phase single-station layout , the lack of the single-station layout method of the GEOSAR phase calibration system, etc., to reduce the complexity, meet the needs of phase calibration, and reduce the cost of layout
CN105527622BActive Publication Date: 2018-07-10INST OF ELECTRONICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF ELECTRONICS CHINESE ACAD OF SCI
Publication Date
2018-07-10

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Abstract

The invention belongs to the technical field of space-borne synthetic aperture radar signal processing, and specifically relates to a layout method of a single ground calibration station for geosynchronous synthetic aperture radar (GEOSAR) phase calibration. The method comprises: selecting a layout line for the single ground calibration station for GEOSAR phase calibration; selecting a rough site of the single ground calibration station; and optimizing the rough site of the single ground calibration station. By adopting the method, the problem of site selection of the single ground calibration station of a GEOSAR phase calibration system is specifically solved; limited land resource is reasonably utilized, the phase calibration requirement of a GEOSAR specific observation target is met, the layout cost of the ground calibration station is reduced, and the complexity of the GEOSAR phase calibration system is reduced.
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Description

technical field

[0001] The invention belongs to the technical field of spaceborne synthetic aperture radar signal processing, and in particular relates to a layout method of a single ground calibration station for GEOSAR phase calibration. Background technique

[0002] Geosynchronous Synthetic Aperture Radar (Geosynchronous Synthetic Aperture Radar, GEOSAR) is a spaceborne SAR based on a geosynchronous satellite with an orbital height of 36,000km. Geosynchronous orbit SAR phase calibration is a method to obtain motion compensation information for GEOSAR echo The technology uses a ground calibration station whose position is precisely known to transmit a pulsed chirp calibration signal to the GEOSAR satellite, and uses a matched filter pulse compression method to extract phase information from the calibration echo signal to provide post-imaging processing. Accurate phase reference. The accuracy of GEOSAR phase calibration depends on equipment accuracy, atmospheric propagatio...

Claims

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