文章基本信息

标题：Investigation of ionospheric gradients for GAGAN application
其他标题：Investigation of ionospheric gradients for GAGAN application
本地全文：下载
作者：K. Ravi Chandra ; V. Satya Srinivas ; A. D. Sarma 等
期刊名称：Earth, Planets and Space
电子版ISSN：1880-5981
出版年度：2009
卷号：61
期号：5
页码：633-635
DOI：10.1186/BF03352939
出版社：Springer Verlag
摘要：To cater to the needs of aviation applications, GPS Aided GEO Augmented Navigation (GAGAN) system is being implemented over the Indian region. The most prominent parameter affecting the navigation accuracy of GAGAN is ionospheric delay which is a function of TEC. In the equatorial and low latitude regions such as India, TEC is often quite high with large spatial gradients. Carrier phase data from the GAGAN network of Indian TEC Stations is used for estimating ionospheric gradients in multiple viewing directions. Rate of TEC (ROT) and Rate of TEC Index (ROTI) are calculated to identify the ionospheric gradients. Among the satellite signals arriving in multiple directions, the signals which suffer from severe ionospheric gradients are identified and avoided for improving GAGAN positional accuracy. The outcome of this paper will be helpful for improving GAGAN system performance.
关键词：GAGAN ;ionospheric gradients ;ROT ;ROTI