近年来我国GNSS电离层延迟精确建模及修正研究进展

空间电离层是影响全球卫星导航系统(GNSS)应用服务性能最棘手的误差源之一。近几十年来,随着地基/空基GNSS数据的日益丰富,国内外学者发展并提出了多种重要技术措施修正、削弱电离层延迟对各类GNSS用户导航定位的影响,取得了重要进展和成果。本文在系统总结GNSS空间电离层延迟影响修正研究成果的基础上,从电离层延迟信息精确提取、建模及误差分析、实时改正方法等几个方面,重点介绍了近年来我国在这一领域的主要研究进展情况。

Research Progress of Precise Models and Correction for GNSS Ionospheric Delay in China over Recent Years

The ionosphere effects account for one of the most challenging error sources that can severely affect the performance of Global Navigation Satellite System (GNSS) applications. In the past a few decades, owing to the fact that the ground-and space-based GNSS data are rapidly growing, many researchers have developed and presented a series of theories, methods and techniques to weaken or eliminate the impact of ionospheric delay on GNSS user navigation and positioning, and achieved a number of important achievements and progress. In this paper, a brief review is made towards study on GNSS ionospheric delay correction in China over recent years, with special attention focused on accurate extraction of ionospheric delay, modeling TEC and error analysis, and real-time ionospheric delay correction methods.