摘要
IGS提供的关于电离层电子总含量TEC数据的ionex文件,包含的TEC图形在时间和经纬度方面都是离散的。通过插值可计算任意时间、地点的VTEC值。该文利用插值与投影函数,提取GPS射线与电离层单层模型穿刺点处的TEC,并与双频GPS观测提取的TEC进行对比。结果表明,在曲线变化趋势上,通过插值投影获得的TEC与双频GPS解算相吻合;在精度方面,ionex插值高于GPS码观测及相位观测单独解算结果,低于码观测与相位观测联合解算。
The IGS provides a ionex file about TEC data of the total content of the ionosphere,the TEC figures are discrete in terms of time and latitude and longitude. The VTEC value of any time and place can be calculated by the interpolation. In this paper,the interpolation and projection functions are used to extract the TEC of GPS ray and the puncture point at the ionosphere single layer model,and it is compared with the TEC extracted by dual frequency GPS observation. The results show that on the change trend of curve,the TEC obtained by interpolation projection is in agreement with the dual frequency GPS solution; In terms of precision,the ionex interpolation is higher than that by GPS code observation and separate calculation results by phase observation,but which is lower than the joint solution of code observation and phase observation.
作者
袁建刚
刘大鹏
Yuan Jiangang1 Liu Dapeng2(1. Jiangsu Urban and Rural Consteruction College 2. School of Earth Science and Engineering, Hohai Universit)
出处
《勘察科学技术》
2018年第1期9-12,共4页
Site Investigation Science and Technology
