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Refractivity estimations from an angle-of-arrival spectrum |
Zhao Xiao-Feng(赵小峰)† and Huang Si-Xun(黄思训) |
Institute of Meteorology, PLA University of Science & Technology, Nanjing 211101, China |
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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.
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Received: 14 August 2010
Revised: 13 September 2010
Accepted manuscript online:
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PACS:
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92.60.Ta
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(Electromagnetic wave propagation)
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78.20.Ci
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(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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02.30.Zz
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(Inverse problems)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 40775023). |
Cite this article:
Zhao Xiao-Feng(赵小峰) and Huang Si-Xun(黄思训) Refractivity estimations from an angle-of-arrival spectrum 2011 Chin. Phys. B 20 029201
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