摘要
通过计算对流层延迟和精密单点定位的点位坐标,研究雾霾天气对GPS天顶对流层延迟和精密单点定位精度的影响。结果表明,当空气质量持续良好、没有雾霾发生时,空气质量指数(air quality index,AQI)与对流层延迟的相关性很小;当重度雾霾天气持续发生时,雾霾会对天顶对流层延迟产生40~60mm的影响。但在精密单点定位中,通过对对流层延迟进行参数估计的方法可以消除绝大部分雾霾对定位精度的影响,因此无论重度雾霾天气是否发生,AQI指数与精密单点定位精度的相关性很小。
We calculate the value of the effects of fog and hazy weather on GPS zenith tropospheric delay and precise point positioning.Our results show that there is a weak correlation between AQI index and the tropospheric delay when the air quality is continuously good without fog and haze.The most severe fog and haze will affect the zenith tropospheric delay,with effect values from about 40-60 mm.However,in precise point positioning,most of positioning inaccuracy affected by haze can be eliminated by the method of tropospheric delay parameter estimation,in which there is a weak correlation between AQI index and the accuracy of precise point positioning,whether or not there is heavy fog and haze.
作者
魏二虎
杨志鑫
刘学习
孙浪浪
WEI Erhu YANG Zhixin LIU Xuexi SUN Langlang(School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan 430079)
出处
《大地测量与地球动力学》
CSCD
北大核心
2017年第11期1146-1149,共4页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(41374012)~~
关键词
雾霾
GPS
对流层延迟
精密单点定位
fog and haze
GPS
zenith tropospheric delay
precise point positioning