关键词: 全球卫星定位系统, 格网电离层模型, 站际分区法, 绝对与相对方案, 电离层蚀因子法, 变样本自协方差估计, 电离层延迟

Abstract:

Recently, according to the requirements of some im portant GPS research subjects in the fields of Geodesy, Geophy sics, Space -P hysics and Navig at ion in China, w e studied systematically how to correct the ef fects of the ionosphere on GPS, wi th high precision and accuracy.As the parts of t he main contributions, the research projects focus mainly on how to improve GPS survey by re-ducing ionospheric delay fo r dual/single f requency kinematic/static users :high accuracy co rrection of ionospheric delay for single/dual f requency GPS users on t he eart h and in space, China WAAS ionospheric modeling and the theory and met hod of monitoring of ionosphere using GPS.

Key words: Global Positioning System (GPS), Grid Ionospheric Model (GIM), Absolute Plus Relative scheme (APR), Ionospheric Eclipse Facto r Method (IEFM), Auto -Covariance Est im a-tion of Variable Samples (ACEVS), Dif ferent Area fo r Dif ferent Stations (DADS), Ionospheric Delay (ID)