Ionosphere integrity monitoring on the BDS

Abstract

Integrity is the ability which the system sends out warnings to users when the navigation system has any failures or outliers overrunning, it can't be used for navigation and positioning. Given the user safety, the integrity of the navigation system is more important than the precision. The BDS is a new GNSS system following GPS and GLONASS, which is carried out by China independently. In order to better the global service of the BDS, it is necessary to induct integrity monitoring with the on the BDS. Ionosphere delay is one of the biggest error sources after the United States to canceled SA policy. Its changes are the most complex and difficult to model accurately. Ionosphere integrity monitoring must be conducted in order to guarantee the reliability and availability of positioning by mobile users. This paper is based on the BDS data of CORS network in Hebei province to conduct ionosphere integrity monitoring. The results show that the ionosphere delay calculated by these data is stable, and the data are available. Two integrity monitoring indicator IRIM and IRIU both reflect the situation of regional ionosphere delay. It has important significance to study the BDS. © 2013 Springer-Verlag Berlin Heidelberg.