利用GPS技术实时监测上海区域电离层变化  

Real-time Monitoring of Ionosphere Changes in the Shanghai Region by GPS Technology

作　　者：王虎[1] 王解先[1,2] 白贵霞[2,3] 朱卫东[1] 

机构地区：[1]同济大学测量与国土信息工程系,上海200092 [2]现代工程测量国家测绘局重点实验室,上海200092 [3]陕西测绘局,西安710054

出　　处：《空间科学学报》2011年第5期602-606,共5页Chinese Journal of Space Science

基　　金：国家自然科学基金项目资助(40974018)

摘　　要：基于GPS技术实时监测电离层变化原理,利用载波平滑伪距观测值建立区域电离层模型的方法,计算了电离层延迟量和硬件延迟,根据硬件延迟值相对稳定的特点,采取一定时段求解出硬件延迟量,对实时硬件延迟量进行预报,进而实时分离GPS信号传播路径上的垂直总电子含量VTEC.利用上海区域内的GPS网的观测数据,建立实时上海区域电离层延迟模型,监测上海区域的电离层变化.数据分析结果表明,这种方法的内符合精度优于3TECU.A method of real-time monitoring ionosphere based on GPS technology is described in this paper. The regional ionosphere model is constructed using GPS phase-smoothed pseudorange measurements. The ionosphere delay and instrumental bias are also calculated. Because the instrumental bias is stable, its value can be obtained after a period of time. Using this value, realtime instrumental bias can be forecasted. After deducted the instrumental bias from GPS signal, the real-time ionosphere information can be extracted in path of signal propagation. To validate this method, the data of Shanghai regional GPS network are used and a real-time regional ionosphere model is created. The results show the internal precision of this regional ionosphere model are better than 3 TECU.

关 键 词：GPS 载波平滑伪距 电离层模型 硬件延迟 

分 类 号：P228.4[天文地球—大地测量学与测量工程]