一种对流层折射误差的实时简化修正方法

乔江; 杜晓燕; 卫佩佩

doi:10.11884/HPLPB201830.180146

一种对流层折射误差的实时简化修正方法

doi: 10.11884/HPLPB201830.180146

乔江^1,,
杜晓燕^{1, 2, ,},
卫佩佩¹

1.
信息工程大学信息系统工程学院，郑州 450001
2.
郑州大学信息工程学院, 郑州 450001

基金项目:

国家自然科学基金项目 61271104

详细信息

作者简介:
乔江(1995—)，男，硕士研究生，从事对流层电波传播的研究; qj951213@163.com

通讯作者:
杜晓燕(1975—)，女，副教授，主要从事电磁场、微波技术与天线等的教学和科研工作; 17638166718@163.com

中图分类号: P228
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- 被引次数: 0
出版历程
- 收稿日期: 2018-05-18
- 修回日期: 2018-07-19
- 刊出日期: 2018-10-15

Real-time simplified correction method for tropospheric refraction error

Qiao Jiang^1
,,
Du Xiaoyan^{1, 2
, ,},
Wei Peipei¹

1.
Institute of Information Systems Engineering, Information Engineering University, Zhengzhou 450001, China
2.
School of Information Engineering, Zhengzhou University, Zhengzhou 450001, China

摘要

摘要: 对流层折射误差是影响雷达测量定位系统精度的主要因素之一。针对VMF1(Vienna Mapping Function 1)用于对流层折射误差修正时存在的实时性差、分辨率低的问题，引入GPT2w模型并提供分辨率为1°×1°的相关参数，结合Saastamoinen模型构建形成SG-VMF1模型。基于新模型和映射函数法的计算原理，对4个IGS(International GNSS Service)测站在不同高度角时的对流层折射误差进行估算，并与射线描迹法的计算结果进行对比分析。结果显示：以结合IGS实测气象数据的射线描迹法的计算结果为基准时，利用SG-VMF1模型及相关理论计算的结果在高度角大于6°时RMS值可达到0.4 m，在高度角大于30°时RMS值可达到0.1 m，计算方法可行有效，且具有实时性和较高的分辨率。
- 对流层折射误差 /
- 误差修正 /
- 映射函数法 /
- 实时性 /
- GPT2w模型 /
- VMF1
Abstract: Tropospheric refraction error is one of the main factors that affect the accuracy of radar measurement and positioning system. In view of the poor real-time and low resolution of the Vienna Mapping Function 1 (VMF1) in refraction error correction, this paper introduces the GPT2w model that can provide some relevant parameters with a resolution of 1°×1°, and build a new model that named as SG-VMF1 by combining with the Saastamoinen model. Based on the new model and the calculation principle of the mapping function method, the tropospheric refraction error values of 4 International GNSS Service (IGS) stations at different elevation angles are estimated. The results demonstrate that when taking the results calculated by ray-tracing method based on IGS meteorological data as a reference, the RMS with the result of SG-VMF1 model and relevant calculation theory can reach 0.4 m when the elevation angle is 6°, and the RMS can reach 0.1 m when the elevation angle is greater than 30°. The new calculation method is feasible and effective, and with real-time and higher resolution.
- tropospheric refraction error /
- error correction /
- mapping function method /
- real-time /
- GPT2w model /
- VMF1

HTML全文

图 1 对流层折射误差在不同高度角的分布示意图

Figure 1. Distribution schematic diagram of the diurnal variation of the refraction error at different elevation angles

下载: 全尺寸图片幻灯片

图 2 以射线描迹法的计算结果为基准时SG-VMF1模型在4个测站处的变高度角误差值分布图

Figure 2. The bias and RMS differences between the SG-VMF1 model and the ray-tracing method based on IGS data for different elevation angles at 4 stations

下载: 全尺寸图片幻灯片

表 1 IGS测站信息(按纬度升序排列)

Table 1. Information of IGS stations(In ascending order of latitude)

station	θ_lat/(°N)	θ_lon/(°E)	height/m	city
TWTF	24.95	121.16	184.0	Taoyuan
XIAN	34.37	109.22	498.5	Xi’an
BJFS	39.61	115.89	98.3	Beijing
URUM	43.59	87.63	917.9	Urumqi

下载: 导出CSV

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