Real-time Estimation Method for Tropospheric Scatter Slant Delay at Low Elevation

WU Wenyi; CHEN Xihong; LIU Shaowei

doi:10.11999/JEIT160776

Volume 39 Issue 6

Jun. 2017

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Article Navigation > Journal of Electronics & Information Technology > 2017 > 39(6): 1326-1332

WU Wenyi, CHEN Xihong, LIU Shaowei. Real-time Estimation Method for Tropospheric Scatter Slant Delay at Low Elevation[J]. Journal of Electronics & Information Technology, 2017, 39(6): 1326-1332. doi: 10.11999/JEIT160776

Citation:

WU Wenyi, CHEN Xihong, LIU Shaowei. Real-time Estimation Method for Tropospheric Scatter Slant Delay at Low Elevation[J]. Journal of Electronics & Information Technology, 2017, 39(6): 1326-1332. doi: 10.11999/JEIT160776

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Real-time Estimation Method for Tropospheric Scatter Slant Delay at Low Elevation

doi: 10.11999/JEIT160776

1.
2.
(Air and Missile Defense College, Air Force Engineering University, Xi&rsquo

Funds:

The National Natural Science Foundation of China (61571459)

Received Date: 2016-07-22
Rev Recd Date: 2017-04-05
Publish Date: 2017-06-19

Abstract

Abstract

Based on ray tracing, a real-time method of tropospheric scatter slant delay estimation is proposed to estimate the low-elevation tropospheric delay in the absence of meteorological data. The model uses the UNB3m model to obtain atmospheric meteorological parameters, establishes the tropospheric atmospheric refractive index profile model, and overcomes the limitation of meteorological data on the refractive index calculation in the ray tracing method. The atmospheric refractive index profile of the troposphere is calculated by using the meteorological data of the International GNSS Service (IGS) stations in Asia in 2012, and the accuracy of the tropospheric delay model is verified to be less than 25 mm. The three stations with the baseline distance are selected and divided into three sets of scatter correspondence comparison stations. The oblique delay at0--5 incident angle is calculated by ray tracing method. The results show that the maximum one-way propagation delay is 22.38--48.37 m for the three groups, and 3.73--8.07 ns for the two-way time offset 95%.
- Tropospheric scatter,
- Atmospheric refraction,
- Slant delay,
- Ray-tracing

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References(32)

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