电离层探测 meaning in English

ionospheric probing
ionospheric sounding

As the parts of the main contributions , the research projects focus mainly on how to improve gps surveying by reducing ionospheric delay for dual / single frequency kinematic / static users : high accuracy correction of ionospheric delay for single / dual frequency gps users on the earth and in space , china waas ionospheric modeling and the theory and method of monitoring of ionosphere using gps . the main contents of this ph . d paper consist of two parts : fisrt part - the outline of research background and the systematic introduction and summarization of the previous research results of this work
本文主要包括两方面的内容：一、研究背景的一般性描述及相关基础研究的系统总结和介绍，主要涉及：地球电离层研究意义，地球电离层探测技术与相关理论研究的内容，现代大地测量中电离层问题的由来、严重性与新课题，地球电离层的基本特性及其对电波传播的影响， gps定位的基本理论与方法，电离层延迟对gps测量的影响， gps的电离层延迟改正的基本方法，基于gps的电离层研究的基本原理与方法等。