Ionosphere Integrity Monitoring on the BDS
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 mo
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Ionosphere Integrity Monitoring on the BDS Chuanhua Zhao, Jinzhong Bei and Yamin Dang
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. Keywords BDS
Integrity monitoring Ionosphere delay IRIM IRIU
25.1 Introduction COMPASS satellite navigation system is a global satellite navigation system of self-development and independent running which is being carried out by China. According to the overall plan of the system construction, 2012 years or so, the C. Zhao (&) Shandong University of Science and Technology, Qingdao 266510, China e-mail: [email protected] C. Zhao J. Bei Y. Dang Chinese Academy of Surveying and Mapping, Beijing 100830, China
J. Sun et al. (eds.), China Satellite Navigation Conference (CSNC) 2013 Proceedings, Lecture Notes in Electrical Engineering 244, DOI: 10.1007/978-3-642-37404-3_25, Ó Springer-Verlag Berlin Heidelberg 2013
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system will firstly have the ability of positioning, navigation, timing services and short message communication service in the Asia-pacific region. Around 2020, the worldwide COMPASS system will be built. Integrity is the ability which the system sends out warnings to users when the navigation system has any failure or error overrunning, and it can’t be used for navigation and positioning. The integrity information of the system is required no matter when and where, and they are important parameters which guarantee the safety of users [1]. Ionosphere delay error is one of the biggest error sources after the United States canceled SA policy. Its changes are the most complex, so it is significant to study the integrity of the ionosphere. This paper puts forward ionosphere integrity monitoring of the COMPASS system based on the Hebei province CORS network, and has monitored the measured data. Some useful conclusions are obtained.
25.2 Algorithm Processing The ionosphere integrity monitoring of COMPASS syste
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