摘要
提出了一种采用载波观测量组成电离层观测值计算天顶电离层总电子含量(VTEC)的方法,以克服GNSS伪距观测值多路径效应及频间偏差对VTEC计算的不利影响,并采用广播星历来提高计算结果的实时性。在强电离层活动下的零(短)基线实验结果表明,采用该方法计算的VTEC结果精度优于采用载波平滑伪距观测量的计算结果。初步验证了该方法用于区域电离层活动监测的可行性。
A method to estimate VTEC with undifferenced carrier-phase was introduced, which could avoid the in- fluence of pseudorange multipath effect and interfrequency biases on VTEC estimation. And the results timliness was improved by using broadcast ephemeris to calculation satellite position. Moreover, better VTEC estimation ac- curacy was demonstrated by short-and zero-baseline experiment results, which preliminarily validated the possibili- ty to apply this method for regional ionosphere monitoring.
出处
《测绘科学技术学报》
CSCD
北大核心
2013年第6期581-585,共5页
Journal of Geomatics Science and Technology
基金
国家自然科学基金项目(41274045)
关键词
天顶电离层总电子含量
载波观测量
广播星历
载波相位平滑伪距
卡尔曼滤波
VTEC （Vertical Total Electron Content）
carrier-phase observable
broadcast ephemeris
phase- smoothed pseudorange observable
Kalman filter
