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Satellite-borne SAR and GNSS-S integrated system and cooperative detection method

A space-borne, frequency-band technology, applied in the field of space-borne SAR and GNSS-S integrated systems and collaborative detection, can solve the problems of difficult to achieve meter-level resolution SAR imaging, unfavorable ship target recognition, and limited effective bandwidth of navigation satellite signals And other issues

Active Publication Date: 2022-05-20
BEIJING SATELLITE INFORMATION ENG RES INST
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Problems solved by technology

However, limited by the effective bandwidth of navigation satellite signals, the imaging resolution is generally above 10m, so this type of technology is still difficult to achieve meter-level resolution SAR imaging, which is not conducive to ship target recognition in the image domain

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Embodiment Construction

[0087] In order to more clearly describe the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that are used in the embodiments. Apparently, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to these drawings without creative efforts.

[0088] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, and the embodiments cannot be repeated here one by one, but the embodiments of the present invention are not therefore limited to the following embodiments.

[0089] see figure 1 , the space-borne L-band SAR and GNSS-S integrated system of the present invention can be applied to the research of space-based distributed high-resolution wide-range SAR system, and is used for sea surface ship target search and tracking and ...

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Abstract

The invention relates to a satellite-borne SAR (Synthetic Aperture Radar) and GNSS (Global Navigation Satellite System)-S (Global Navigation Satellite System) integrated system and a cooperative detection method, and the system comprises an L-band three-frequency-band common-aperture phased array antenna (100) which is used for transmitting and receiving electromagnetic signals of three sub-frequency bands of an L-band at the same time; the radar host (200) is used for receiving and transmitting SAR signals, receiving GNSS-S signals and performing radar time sequence control; and the on-orbit processing system (300) is used for carrying out coherent processing, SAR imaging and target detection on SAR signals and GNSS-S radar signals, carrying out on-orbit shaping on wave beams of the L-band three-frequency-band common-aperture phased array antenna (100), and completing sea surface ship target search detection, imaging identification and positioning tracking. The method has the advantages of large-range sea surface target search, high-resolution imaging, long-time tracking and the like.

Description

technical field [0001] The invention relates to a spaceborne SAR and GNSS-S integrated system and a cooperative detection method. Background technique [0002] Large-area surface ship target search and tracking and high-resolution SAR imaging have always been hot spots in scientific research. Affected by weather such as clouds, rain and fog at sea, it is difficult for optical sensors to take advantage of their high-resolution imaging and recognition. On the other hand, the spaceborne SAR system can penetrate clouds and fog, and can observe the sea all day and all day, which is suitable for high-resolution imaging and detection applications of sea surface ship targets. However, the existing spaceborne single-system SAR radar system is difficult to simultaneously meet the concurrent requirements of multiple tasks such as large-scale sea surface ship target search and detection, high-resolution imaging recognition, and long-term target tracking. When using GNSS-S for target d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/90G01S19/48G01S7/41G01S7/02
CPCG01S13/904G01S19/485G01S7/021G01S7/023G01S7/415
Inventor 夏正欢张庆君金世超岳富占赵志龙张涛张瑶刘新张闯高文宁徐振兴董启甲张胜辉
Owner BEIJING SATELLITE INFORMATION ENG RES INST
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