中国物理B ›› 2011, Vol. 20 ›› Issue (2): 29201-029201.doi: 10.1088/1674-1056/20/2/029201

• GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS • 上一篇    下一篇

Refractivity estimations from an angle-of-arrival spectrum

赵小峰, 黄思训   

  1. Institute of Meteorology, PLA University of Science & Technology, Nanjing 211101, China
  • 收稿日期:2010-08-14 修回日期:2010-09-13 出版日期:2011-02-15 发布日期:2011-02-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 40775023).

Refractivity estimations from an angle-of-arrival spectrum

Zhao Xiao-Feng(赵小峰)† and Huang Si-Xun(黄思训)   

  1. Institute of Meteorology, PLA University of Science & Technology, Nanjing 211101, China
  • Received:2010-08-14 Revised:2010-09-13 Online:2011-02-15 Published:2011-02-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 40775023).

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摘要： This paper addresses the probability of atmospheric refractivity estimation by using field measurements at an array of radio receivers in terms of angle-of-arrival spectrum. Angle-of-arrival spectrum information is simulated by the ray optics model and refractivity is expressed in the presence of an ideal tri-linear profile. The estimation of the refractivity is organized as an optimization problem and a genetic algorithm is used to search for the optimal solution from various trial refractivity profiles. Theoretical analysis demonstrates the feasibility of this method to retrieve the refractivity parameters. Simulation results indicate that this approach has a fair anti-noise ability and its accuracy performance is mainly dependent on the antenna aperture size and its positions.

Abstract: This paper addresses the probability of atmospheric refractivity estimation by using field measurements at an array of radio receivers in terms of angle-of-arrival spectrum. Angle-of-arrival spectrum information is simulated by the ray optics model and refractivity is expressed in the presence of an ideal tri-linear profile. The estimation of the refractivity is organized as an optimization problem and a genetic algorithm is used to search for the optimal solution from various trial refractivity profiles. Theoretical analysis demonstrates the feasibility of this method to retrieve the refractivity parameters. Simulation results indicate that this approach has a fair anti-noise ability and its accuracy performance is mainly dependent on the antenna aperture size and its positions.

Key words: refractivity estimation, angle-of-arrival spectrum, ray optics model, genetic algorithm

中图分类号:  (Electromagnetic wave propagation)

  • 92.60.Ta
78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)) 02.30.Zz (Inverse problems)