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A zero Faraday rotation contour determination method and system

A technology of Faraday rotation and determination method, which is applied in the field of signal processing and can solve problems such as large amount of calculation

Active Publication Date: 2022-01-04
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When using this method, and when the parameters and observation geometry of the spaceborne SAR system change, it is necessary to re-perform the traversal simulation, resulting in a huge amount of calculation

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  • A zero Faraday rotation contour determination method and system
  • A zero Faraday rotation contour determination method and system
  • A zero Faraday rotation contour determination method and system

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Embodiment Construction

[0070] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0071] The purpose of the present invention is to provide a zero Faraday rotation contour determination method and system to reduce the amount of calculation.

[0072] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0073] This embodiment provides a zero Faraday rotat...

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Abstract

The invention relates to a zero Faraday rotation contour determination method and system, and relates to the field of signal processing. The method includes: acquiring spaceborne SAR system parameters, time parameters and cycle variables; using the time parameters and cycle variables to determine the current world time variable; using the current world time variable and the spaceborne SAR system parameters to determine the ground irradiation target's position when the Faraday rotation angle is zero. Unit vector; use the unit vector to determine the latitude and longitude of the ground illumination target; when the current universal time variable is greater than or equal to the end of the universal time, obtain the latitude and longitude of all ground illumination targets to obtain the zero Faraday rotation contour of the spaceborne SAR. The present invention directly calculates the position of the zero Faraday rotation angle on the earth under each world time variable through the spaceborne SAR system parameters and time parameters, and can quickly obtain the spaceborne SAR zero Faraday rotation contour, compared with the traditional traversal simulation method The amount of calculation is reduced.

Description

technical field [0001] The invention relates to the field of signal processing, in particular to a method and system for determining contour lines of zero Faraday rotation. Background technique [0002] The Faraday rotation effect refers to the rotation of the polarization plane relative to the incident wave due to the influence of the electromagnetic field when the linearly polarized radio wave propagates in the electromagnetic field. The deflection angle caused by the Faraday rotation effect is related to the signal frequency, ionospheric electron density and propagation path length. For spaceborne Synthetic Aperture Radar (SAR), the full polarization data can be used to accurately estimate the Faraday rotation angle, and then the estimated Faraday rotation angle can be used to estimate the total amount of electrons and the scintillation phase. [0003] However, when the strength of the geomagnetic field along the SAR signal propagation direction is zero, the Faraday rota...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90G01S7/02
CPCG01S13/9094G01S7/02
Inventor 曾虹程陈杰王鹏波杨威
Owner BEIHANG UNIV