长三角地区多模GNSS斜路径观测分布及水汽仿真层析

王维; 宋淑丽; 王解先; 陈钦明; 朱文耀; 叶碧文

doi:10.11947/j.AGCS.2016.20140648

测绘学报 >

2016 , Vol. 45 >Issue 2: 164 - 169

DOI: https://doi.org/10.11947/j.AGCS.2016.20140648

大地测量学与导航

长三角地区多模GNSS斜路径观测分布及水汽仿真层析

王维 ,
宋淑丽 ,
王解先 ,
陈钦明 ,
朱文耀 ,
叶碧文

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1. 江苏省地震局, 江苏南京 210014;
2. 中国科学院上海天文台, 上海 200030;
3. 同济大学测绘与地理信息学院, 上海 200092

王维(1982-),女,博士,助理研究员,研究方向为GPS数据处理与应用技术。

收稿日期: 2014-12-08

修回日期: 2015-06-15

网络出版日期: 2016-02-29

基金资助

国家自然科学基金(41174023);国家自然科学基金青年基金(11403083);国家自然科学基金面上项目(11273048);江苏省测绘地理信息科研项目(JSCHKY201510)

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Distribution Analysis of Multi GNSS Slant Delays and Simulated Water Vapor Tomography in Yangtze River Delta

WANG Wei ,
SONG Shuli ,
WANG Jiexian ,
CHEN Qinming ,
ZHU Wenyao ,
YE Biwen

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1. Jiangsu Earthquake Administration, Nanjing 210014, China;
2. Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China;
3. College of Surveying and Geo-informatics, Tongji University, Shanghai 200092, China

Received date: 2014-12-08

Revised date: 2015-06-15

Online published: 2016-02-29

Supported by

The National Nature Science Foundation of China (No.41174023);The National Science Foundation for Young Scholars of China (No.11403083);The National Nature Science Foundation of China General Program(No.11273048);Surveying, Mapping and Geoinformation Research Program of Jiangsu(No.JSCHKY201510)

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摘要

目前长三角地区GNSS网已应用于该地区上空水汽的日常监测和水汽层析的研究。由于该GNSS网站间距较大、分布不均匀,斜路径观测值不能完全满足高精度水汽三维层析的需要,因此,本文对该地区进行了多模GNSS(GPS、Galileo、GLONASS、BDS)的观测仿真和水汽层析试验。结果表明,多模GNSS观测值角度变化范围大,在空间分布更均匀,相同观测条件下,多模GNSS观测值明显降低了空间格网的空格率,特别是改善了大气中上层格网的观测值覆盖情况。多模GNSS观测值弥补了单系统观测分布不均的状况,为空间格网提供了更为丰富的大气观测信息。通过仿真层析试验可以看出多模GNSS能够明显改善层析效果,尤其能够提高地面5 km以上的层析精度。

关键词： 多模GNSS; 斜路径观测值; 水汽层析; 时空分布

本文引用格式

王维 , 宋淑丽 , 王解先 , 陈钦明 , 朱文耀 , 叶碧文 . 长三角地区多模GNSS斜路径观测分布及水汽仿真层析[J]. 测绘学报, 2016 , 45(2) : 164 -169 . DOI: 10.11947/j.AGCS.2016.20140648

Abstract

Currently, the GNSS network of Yangtze River delta has being applied to monitor the water vapor above this region and research water vapor tomography. Studies have shown that the dictances between stations are large and inhomogeneous, that will make it difficult to get the high tomography precision. Therefore, a simulation test of multi GNSS observations on tomography is introduced. The multi GNSS observations are more homogeneous in spatial distribution than a single positioning system, which can reduce the space rate of the grid, especially increase the number of the grid with information at middle and high layers. The multi GNSS observation can provide more and better water vapor information which can patch up deficiency of a single positioning system. A simulated water vapor tomography is carried out, and the result shows that the multi GNSS observations could improve the accuracy of tomography, especially above the 5 km height layer of the atmosphere.

Key words： multi GNSS; slant delay; water vapor tomography; temporal and spatial distribution

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