Efficient site selection method and device for multi-satellite shared SAR (Synthetic Aperture Radar) comprehensive calibration field
A calibration and high-efficiency technology, applied in the field of radar detection, can solve the problems of lack of geographical data, time-consuming, labor-intensive costs, errors, etc., and achieve the effect of improving accuracy and efficiency, improving utilization rate, and improving efficiency
Active Publication Date: 2021-06-11
AEROSPACE INFORMATION RES INST CAS
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[0006] (1) The site selection of the conventional spaceborne SAR calibration field only considers the calibration requirements of single-band and single-polarization, and cannot meet the calibration requirements of multi-band, multi-polarization, and multi-mode. In addition to equipment measurement errors, the reference elevation of the target may also have reference elevation errors due to penetration depth and signal-to-noise ratio decoherence
[0007] (2) The traditional method uses maps and on-site measurements. There is no informatized geographic data, and each band and each polarization requires on-site measurements. It is time-consuming and labor-intensive to apply to the site selection conditions of the multi-satellite shared SAR comprehensive calibration field. High cost problem
[0008] (3) Traditional measurement methods are difficult to obtain information such as terrain fluctuations and backscatter coefficients of multi-satellite integrated calibration fields as distributed targets
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[0032] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. It should be understood, however, that these descriptions are exemplary only, and are not intended to limit the scope of the present disclosure. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concepts of the present disclosure.
[0033] The terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the present disclosure. The terms "comprising", "comprising", etc. used herein indicate the presence of stated features,...
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The invention provides an efficient site selection method for a multi-satellite shared SAR comprehensive calibration field, which comprises the following steps: S1, determining a calibration position range of the multi-satellite shared SAR comprehensive calibration field according to the breadth of each satellite; S2, roughing the positions of the comprehensive calibration fields in the calibration position range to obtain position coordinates of a plurality of comprehensive calibration fields; s3, analyzing site terrains corresponding to the position coordinates of the plurality of comprehensive calibration fields to obtain a plurality of first comprehensive calibration fields meeting interference calibration conditions; and S4, performing backscattering coefficient calculation on the plurality of first comprehensive calibration fields, and selecting at least one second comprehensive calibration field meeting the condition of each satellite on the signal-to-clutter ratio of the field from the plurality of first comprehensive calibration fields according to a backscattering coefficient calculation result. The invention further provides an efficient site selection device for the SAR comprehensive calibration field shared by multiple satellites.
Description
technical field [0001] The present disclosure relates to the technical field of radar detection, and in particular to a method and device for efficient location selection of a multi-satellite shared SAR comprehensive calibration field. Background technique [0002] Synthetic Aperture Radar (SAR) satellite is an important space-borne satellite. Its means of earth observation has the advantages of all-time, all-weather, and wide range, and it is widely used in civil and military fields. More and more SAR satellites have been launched or planned to be launched, covering multiple bands, and a variety of working modes have appeared, including multi-band, multi-polarization, heavy orbit interference (Interferometric SAR), formation satellite interference and other working modes . [0003] At present, the site selection of spaceborne SAR calibration sites is mainly based on the traditional single-band single-polarization radiation calibration, that is, the radar cross-sectional ar...
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IPC IPC(8): G01S7/40G01S13/90
CPCG01S7/40G01S13/90
Inventor 王宇洪峻王爱春齐阳牟静雯杜少岩邱天邢楷初
Owner AEROSPACE INFORMATION RES INST CAS
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