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GEO SAR double-satellite formation configuration design method for coherence tomography

A technology of coherent tomography and design method, which is applied in the direction of using re-radiation, radio wave reflection/re-radiation, measuring devices, etc., can solve the problem that the specified interval change of the vertical baseline cannot be realized, and achieve the goal of improving performance and improving the correlation coefficient Effect

Active Publication Date: 2020-08-07
北京理工大学重庆创新中心 +1
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Problems solved by technology

The existing TomoSAR formation configuration design is mainly aimed at LEO SAR, which uses multiple satellites arranged along the height direction, and cannot realize the vertical baseline to change according to the specified interval with the number of revisits

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  • GEO SAR double-satellite formation configuration design method for coherence tomography
  • GEO SAR double-satellite formation configuration design method for coherence tomography
  • GEO SAR double-satellite formation configuration design method for coherence tomography

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0034] The satellite's orbital elements include semi-major axis, eccentricity, inclination, right ascension of ascending node, argument of perigee, and true anomaly, where the true anomaly can be replaced by the mean anomaly. These six orbital elements determine the unique state of the satellite. In the present invention, the user inputs the orbital elements of the main star (semi-major axis a c , eccentricity e c , inclination i c , right ascension of ascending node Ω c , Argument of perigee ω c , mean anomaly angle M c), heightwise sampling interval ΔB, heightwise initial inter...

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Abstract

The invention provides a GEO SAR double-satellite formation configuration design method for coherence tomography. According to the method, the orbital parameter of a GEO SAR double-satellite formationmaster satellite and the performance requirements of the coherence tomography are obtained, wherein the orbital parameters of the master satellite comprise a semi-major axis ac, eccentricity ec, an inclination angle ic, an ascending node right ascension omegac, a perigee amplitude angle omegac and a mean anomaly Mc, and the performance requirements of the coherence chromatography comprise height-direction sampling parameters; according to the orbital parameters of the master satellite and the height direction sampling parameters, the orbital parameters of a GEO SAR double-satellite formationslave satellite are determined, wherein the orbital parameters of the slave satellite include a semi-major axis ad, an eccentricity ed, an inclination angle id, an ascending node right ascension omegad, a perigee amplitude angle omega d and a mean anomaly Md. According to the method, a formation GEO SAR vertical baseline can be uniformly changed along with the increase of the number of times of revisit according to a specified interval; an along-orbit baseline of each time of revisit can be minimized; and the correlation coefficient of each time of revisit of main and auxiliary images is improved, so that tomography performance is improved.

Description

technical field [0001] The invention relates to the technical field of synthetic aperture radar, in particular to a GEO SAR dual-satellite formation configuration design method for coherent tomography. Background technique [0002] Synthetic Aperture Radar Tomography (TomoSAR) uses multiple Synthetic Aperture Radar (SAR) images with a certain difference in viewing angle to form a synthetic aperture in the height direction, which can separate overlapping targets in the same resolution unit to achieve 3D imaging. The technology of calculating the correlation function for tomography after generating the interferogram using SAR images is called coherence-based TomoSAR. The multi-view processing using the correlation function can effectively reduce the influence of phase noise. It has great application prospects in structure inversion. Because traditional single-satellite SAR obtains multiple images through revisiting satellites to generate interferograms, the revisit interval c...

Claims

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Application Information

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IPC IPC(8): G01S13/90
CPCG01S13/9023G01S13/9058
Inventor 胡程董锡超陈志扬
Owner 北京理工大学重庆创新中心
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