On-orbit implementation design method for satellite-borne SAR mosaic mode

A design method, mosaic technology, applied in computing, radio wave reflection/re-radiation, image data processing, etc.
CN112014840AActive Publication Date: 2020-12-01XIAN INSTITUE OF SPACE RADIO TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
XIAN INSTITUE OF SPACE RADIO TECH
Publication Date
2020-12-01

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Abstract

The invention relates to an on-orbit implementation design method for a satellite-borne SAR mosaic mode. According to the method, a design constraint condition of a mosaic mode is built according to geometric resolution and scene breadth to be achieved by the satellite-borne SAR image and the number of needed pitching beams; an attitude maneuver mode of a satellite platform is designed in a mosaicmode imaging process according to constraint conditions; according to a resolution requirement, the squint angle of an antenna beam at a starting moment and the maneuvering curve of the satellite attitude along with time, each moment when the antenna beam is switched in the pitching direction is solved; and finally, according to the designed attitude maneuvering curve and the beam switching moment, analysis is performed to confirm the conditions that: 1) the azimuth resolution reaches a technical index, and 2) adjacent sub-block images in the mosaic can be effectively spliced in the azimuth direction to ensure the integrity of a whole scene image.
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Description

technical field

[0001] The invention relates to an on-orbit implementation design method of a spaceborne SAR mosaic pattern, and belongs to the technical field of space microwave remote sensing. Background technique

[0002] In order to improve the azimuth resolution and range mapping width of spaceborne SAR images, the mosaic mode of spaceborne SAR on the reflector uses the satellite platform to maneuver to increase the synthetic aperture time in azimuth, and the beam scanning in elevation increases the range coverage area to achieve this. First, the purpose. The key to realizing this mode lies in the attitude maneuvering of the satellite platform and the design of the SAR antenna beam scanning method to ensure the following two goals: 1) the resolution of each sub-block image of the mosaic meets the technical requirements; 2) all sub-blocks Images can be stitched seamlessly in azimuth to ensure the integrity of the entire scene image.

[0003] At present, the research on...

Claims

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