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GNSS-SAR imaging simulation model based on traditional high-frequency electromagnetic scattering theory

A high-frequency electromagnetic and scattering theory technology, applied in the reflection/re-radiation of radio waves, the use of re-radiation, radio wave measurement systems, etc. Effect

Pending Publication Date: 2019-06-21
BEIJING INFORMATION SCI & TECH UNIV
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AI Technical Summary

Problems solved by technology

At present, in the research in this field, the feasibility of using GNSS-R signal for SAR imaging has been verified, but due to the difference between GNSS signal and traditional SAR signal system, the imaging effect has not been ideal. More support for SAR imaging, more accurate simulation results, providing a theoretical basis for the application of GNSS-SAR in the field of remote sensing and observation experiments

Method used

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  • GNSS-SAR imaging simulation model based on traditional high-frequency electromagnetic scattering theory
  • GNSS-SAR imaging simulation model based on traditional high-frequency electromagnetic scattering theory
  • GNSS-SAR imaging simulation model based on traditional high-frequency electromagnetic scattering theory

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Embodiment Construction

[0021] specific implementation

[0022] 1. According to figure 1 As shown, a GNSS signal receiver is set up on the ground, in which the right-handed antenna receives the direct signal, and the left-handed antenna receives the reflected signal to collect GNSS signals.

[0023] The direct signal can be expressed as:

[0024]

[0025] The reflected signal can be expressed as:

[0026]

[0027] 2. According to figure 2 As shown, the satellite signal is converted into an intermediate frequency signal by the data intermediate frequency processing module, the satellite signal data collected by the receiver is processed, the direct signal is tracked and captured, and the satellite that can be tracked is extracted from the navigation message to obtain the receiver Satellite map of the current location.

[0028] 3. According to figure 2 As shown in , the appropriate imaging satellite is selected according to the forward and backward scattering position of the satellite, the...

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Abstract

The invention discloses a GNSS-SAR imaging simulation model based on traditional high-frequency electromagnetic scattering theory with very high applicability. The model is combined with a physical optical method and a four-path method in a traditional composite electromagnetic scattering calculation model, GNSS signals are used as a signal source, and electromagnetic scattering data of an imagingscene are calculated. On the basis of electromagnetic scattering data calculation, imaging simulation is carried out on a sea surface scene by utilizing a backward projection algorithm in a syntheticaperture radar imaging algorithm.

Description

technical field [0001] The invention discloses a GNSS-R signal SAR sea surface target imaging simulation model based on the traditional high-frequency electromagnetic scattering theory. Specifically, it provides a simulation method for SAR imaging of any scene by using GNSS signal as a signal source after considering multi-factor scattering effects. The method accurately simulates SAR imaging for targets in various scenarios through calculation of GNSS signal scattering data, and belongs to the technical field of electromagnetic and microwave imaging. Background technique [0002] Remote sensing technology can accurately and comprehensively monitor changes in the target space environment, has high research value, and has been highly valued by various countries. As a high-resolution microwave imaging radar, SAR can not be affected by bad weather and has all-day and all-weather observation capabilities, which provides a good technical means for remote sensing technology. Wit...

Claims

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Application Information

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IPC IPC(8): G01S13/90G01S19/14
CPCG01S13/9058
Inventor 不公告发明人
Owner BEIJING INFORMATION SCI & TECH UNIV
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