Estimation of Tropospheric Slant Delay Based on Improved Ray Tracing Method

CHEN Xihong; WU Wenyi; LIU Zan

doi:10.11999/JEIT160023

Volume 38 Issue 10

Oct. 2016

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Article Navigation > Journal of Electronics & Information Technology > 2016 > 38(10): 2468-2474

CHEN Xihong, WU Wenyi, LIU Zan. Estimation of Tropospheric Slant Delay Based on Improved Ray Tracing Method[J]. Journal of Electronics & Information Technology, 2016, 38(10): 2468-2474. doi: 10.11999/JEIT160023

Citation:

CHEN Xihong, WU Wenyi, LIU Zan. Estimation of Tropospheric Slant Delay Based on Improved Ray Tracing Method[J]. Journal of Electronics & Information Technology, 2016, 38(10): 2468-2474. doi: 10.11999/JEIT160023

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Estimation of Tropospheric Slant Delay Based on Improved Ray Tracing Method

doi: 10.11999/JEIT160023

Funds:

The National Natural Science Foundation of China (61172169)

Received Date: 2016-01-11
Rev Recd Date: 2016-06-06
Publish Date: 2016-10-19

Abstract

Abstract

The tradition tropospheric delay models and the method of ray-tracing have some limits like inefficiency, high cost and the the restrictions of radiosonde data and surface parameters. An improved method based on ray tracing is proposed. In this method, meteorological parameter formulas in the middle latitude model and meteorological parameter models in UNB3m model are combined to modify the arithmetic of refractive index, which gets rid of the restrictions of radiosonde data. Meteorological data from 10 Asia stations in 2012 are analyzed based on ray tracing technology and tradition models like Hopfield and Saastamoinen. Slant delays for 15 directions, from the zenith to elevations, are computed. The results are compared with ray-tracing tropospheric slant delays from nearby radiosonde measurements, which demonstrates that the accuracy of improved ray tracing method is superior to tradition models, and the proposed method provides a new real time way for estimating tropospheric slant delay in the case of lack of meteorological data.
- Radiosonde,
- Tropospheric slant delay,
- Ray tracing,
- UNB3m model,
- Refractive index

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References(30)

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