Real-time Estimation of Tropospheric Scattering Slant Delay of Low-elevation Obtained by Improved Ray Tracing

Wenyi WU; Fangping ZHONG; Wanpeng WANG; Xihong CHEN; Dan ZHU

doi:10.11999/JEIT190014

Volume 41 Issue 10

Oct. 2019

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Article Navigation > Journal of Electronics & Information Technology > 2019 > 41(10): 2366-2372

Wenyi WU, Fangping ZHONG, Wanpeng WANG, Xihong CHEN, Dan ZHU. Real-time Estimation of Tropospheric Scattering Slant Delay of Low-elevation Obtained by Improved Ray Tracing[J]. Journal of Electronics & Information Technology, 2019, 41(10): 2366-2372. doi: 10.11999/JEIT190014

Citation:

Wenyi WU, Fangping ZHONG, Wanpeng WANG, Xihong CHEN, Dan ZHU. Real-time Estimation of Tropospheric Scattering Slant Delay of Low-elevation Obtained by Improved Ray Tracing[J]. Journal of Electronics & Information Technology, 2019, 41(10): 2366-2372. doi: 10.11999/JEIT190014

Citation:

Wenyi WU, Fangping ZHONG, Wanpeng WANG, Xihong CHEN, Dan ZHU. Real-time Estimation of Tropospheric Scattering Slant Delay of Low-elevation Obtained by Improved Ray Tracing[J]. Journal of Electronics & Information Technology, 2019, 41(10): 2366-2372. doi: 10.11999/JEIT190014

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Real-time Estimation of Tropospheric Scattering Slant Delay of Low-elevation Obtained by Improved Ray Tracing

doi: 10.11999/JEIT190014

1.
Northwest Institute of Nuclear Technology, Xi’an 710024, China
2.
Air and Missile Defense College, Air Force Engineering University, Xi’an 710051, China

Funds: The National Natural Science Foundation of China (611701525)

Received Date: 2019-01-07
Rev Recd Date: 2019-04-23

Available Online: 2019-04-29

Publish Date: 2019-10-01

Abstract

Abstract

Considering the disadvantage of oblique delay estimation of tropospheric scattering at arbitrary stations, which is difficult to obtain real-time sounding meteorological data, an oblique delay estimation algorithm of tropospheric scattering based on improved ray tracing method with ground meteorological parameters is proposed. In order to get rid of the method’s dependence on radiosonde data, the algorithm infers the relationship between refractive index and altitude through the formula of meteorological parameters in the model of medium latitude atmosphere. The interpolation of meteorological parameters in the model of UNB3m is used to gain the coefficient of temperature and water vapor pressure. Meteorological data for 2012 from 6 International GNSS Service (IGS) stations in Asia are selected to test the applicability of new method, the results suggest that precision is less than 1 cm. Then, the tropospheric slant delays of three parts observation stations under different angles of incidence (0°～5°) are calculated by the modified algorithm. The results suggest that the maximum delay is 17.03～33.10 m in a single way time transfer. In two way time transfer, when the delay can counteract 95%, time delay is 2.88～5.52 ns.
- Tropospheric scatter,
- Slant propagation delay,
- Ray tracing,
- Refractive index

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References(18)

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