顾及映射函数误差的对流层延迟两步估计法

doi:10.11947/j.AGCS.2019.20180306

测绘学报 ›› 2019, Vol. 48 ›› Issue (3): 286-294.doi: 10.11947/j.AGCS.2019.20180306

顾及映射函数误差的对流层延迟两步估计法

范昊鹏^1,2, 孙中苗^2,3, 张丽萍^2,3, 刘晓刚^2,3

1. 信息工程大学地理空间信息学院, 河南郑州 450052;
2. 西安测绘研究所, 陕西西安 710054;
3. 地理信息工程国家重点实验室, 陕西西安 710054

收稿日期:2018-07-02 修回日期:2018-09-13 出版日期:2019-03-20 发布日期:2019-04-10
作者简介:范昊鹏(1989-),男,博士生,研究方向为动力大地测量与时空基准。E-mail:fanhaopeng2008@163.com
基金资助:
国家自然科学基金（41674082；41774018）

A two-step estimation method of troposphere delay with consideration of mapping function errors

FAN Haopeng^1,2, SUN Zhongmiao^2,3, ZHANG Liping^2,3, LIU Xiaogang^2,3

1. School of Geospace Information, Information Engineering University, Zhengzhou 450052, China;
2. Institute of Surveying and Mapping, Xi'an 710054, China;
3. State Key Laboratory of Geo-Information Engineering, Xi'an 710054, China

Received:2018-07-02 Revised:2018-09-13 Online:2019-03-20 Published:2019-04-10
Supported by:
The National Natural Science Foundation of China (Nos. 41674082;41774018)

摘要/Abstract

摘要：

利用VLBI、GNSS等空间大地测量数据估计对流层延迟时，通常不考虑映射函数的误差，但这种处理策略最终会对估计结果造成不可忽略的影响。首先，根据多年的气象资料，分析了映射函数误差随高度角的变化特性，然后构建了映射函数误差模型，进而提出了一种顾及映射函数误差的对流层延迟两步估计法。试验表明，本文提出的方法可有效削弱斜路径延迟残差，并在一定程度上改善对流层湿延迟的估计精度。

关键词: 对流层延迟, 映射函数误差, 甚长基线干涉测量, 参数加权平差, 欧洲中期天气预报中心

Abstract:

Mapping function errors are usually not taken into consideration, when space geodetic data observed by VLBI, GNSS and some other techniques are utilized to estimate troposphere delay, which could, however, probably bring non-ignorable errors to solutions. After analyzing the variation of mapping function errors with elevation angles based on several-year meteorological data, this paper constructed a model of this error and then proposed a two-step estimation method of troposphere delay with consideration of mapping function errors. The experimental results indicate that the method puted forward by this paper could reduce the slant path delay residuals efficiently and improve the estimation accuracy of wet tropospheric delay to some extent.

Key words: troposphere delay, mapping function errors, very long baseline interferometry, parameter weighted adjustment, European Centre for Medium-Range Weather Forecasts

中图分类号:

P228

范昊鹏, 孙中苗, 张丽萍, 刘晓刚. 顾及映射函数误差的对流层延迟两步估计法[J]. 测绘学报, 2019, 48(3): 286-294.

FAN Haopeng, SUN Zhongmiao, ZHANG Liping, LIU Xiaogang. A two-step estimation method of troposphere delay with consideration of mapping function errors[J]. Acta Geodaetica et Cartographica Sinica, 2019, 48(3): 286-294.

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顾及映射函数误差的对流层延迟两步估计法

A two-step estimation method of troposphere delay with consideration of mapping function errors

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