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Radiation calibration method based on communication signal tower

A communication signal and radiation calibration technology, which is applied in the field of radiation calibration based on communication signal towers, can solve the problems of no complex target structure characteristics and analysis and modeling of scattering characteristics.

Active Publication Date: 2019-03-29
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology

Some literatures combine the fast far-field approximation theory and the multi-layer fast multipole method to simulate the RCS of a certain type of missile. Although the calculation efficiency is improved, the structural characteristics and scattering characteristics of complex targets are not analyzed and modeled.

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  • Radiation calibration method based on communication signal tower
  • Radiation calibration method based on communication signal tower
  • Radiation calibration method based on communication signal tower

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Embodiment Construction

[0075] The invention will be further described below in conjunction with the accompanying drawings and specific implementation examples. The experimental environment: use MATLAB7.12.0 software programming to realize model solving and FEKO7. 0 software to solve the model. The present invention proposes a radiation calibration method based on communication signal towers, such as figure 1 As shown, the specific process is:

[0076] Step 1: Establish a simplified model of the communication signal tower: Model the communication signal tower as a dihedral reflector and a cylindrical diffuser, such as figure 2 as shown, figure 2 (a) is a three-dimensional structure of a communication signal tower; figure 2 (b) Simplify the model for the communication signal tower, the specific steps include step 1.1 and step 1.2:

[0077] Step 1.1: Model the metal plate 1 at the top of the communication signal tower and the upper surface 2 of the trunk cylinder connected to it as a dihedral co...

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Abstract

The invention provides a radiation calibration method based on a communication signal tower. The method comprises the steps of establishing a simplified model of the communication signal tower, namelymodeling the communication signal tower for obtaining a dihedral angle reflector and a cylindrical scatter; calculating the RCS of the communication signal tower of the dihedral angle reflector model; calculating the RCS of the communication signal tower of the cylindrical scatter model; calculating the RCS of a permanent scatter of the communication signal tower; calculating the target pulse response energy of each communication signal power by means of an integration method; and solving a radiation scaling constant K. According to the method of the invention, the communication signal toweris researched; the communication signal tower is used as one permanent scatter; model simplification is performed on the communication signal tower for calculating a signal tower model RCS; and furthermore the signal tower is used for performing radiation calibration. Correctness, feasibility and validity of the radiation calibration method are verified through simulation. A new effective approachis supplied for quantitative remote sensing in a global range.

Description

technical field [0001] The invention belongs to the field of engineering applications, and in particular relates to a radiation calibration method based on a communication signal tower. Background technique [0002] In recent years, with the continuous launch of more and more remote sensing satellites carrying high-resolution Synthetic Aperture Radar (SAR) systems, microwave remote sensing has entered the era of quantitative remote sensing from the era of qualitative remote sensing. Calibration is an indispensable technical means to realize quantitative earth observation of SAR imaging system. Through the radiometric calibration of SAR images, the precise relationship between its spectral measurement and the radar cross section (Radar Cross Section, RCS) or backscatter coefficient of ground objects can be constructed, which is the premise of the quantitative application of SAR imaging system. Traditionally, radiation calibration is usually done by arranging a certain number...

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Application Information

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IPC IPC(8): G01S7/40G01S13/90
CPCG01S7/40G01S13/90Y02A90/10
Inventor 李玉李佳楠王华斌姜昊男赵泉华张洪云
Owner LIAONING TECHNICAL UNIVERSITY
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