摘要
给出了顾及f3项时消除电离层延迟的两种方法:用三频观测值来消除电离层延迟,直接用地磁场模型来计算f3项。提出了一种用一个三次曲面来拟合30°×40°的区域内的场强H的简化算法。用两种方法求得的电离层延迟之差小于0.5 mm。
Two methods to eliminate the ionospheric delay containing f^3 term are given. The first method is to eliminate ionospheric delay with triple-frequency observations. The second method is directly calculate the f^3 term. A simplified method is proposed that a three order polynomials is used to fit the geomagnetic field intensity of a 30°× 40° area, which can achieve a rather good result. By comparison, the difference of the ionospheric delay between the calculated results by the two methods is less than 0. 5 mm.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2007年第2期139-143,共5页
Geomatics and Information Science of Wuhan University
基金
测绘遥感信息工程国家重点实验室开放研究基金资助项目(040201)
南极考察基础测绘资助项目(1469990324229)
关键词
电离层延迟
三频改正
球谐函数
曲面拟合
格网点
innospheric delay
correction with triple-frequency observations
spherical harmonics
surface fitting
grid point
