Preliminary Test Results of Pseudolite-Based Augmentation System (PBAS)

This paper presents the preliminary test results of Pseudolite-Based Augmentation System (PBAS) which is one of the main objectives of Korean 'Wide Area DGNSS Development project'. Korean government developed the National GNSS Master Plan to support and coordinate the GNSS development in Korea. According to this plan, Wide Area DGPS (WADGPS) research group in Seoul National University (SNU) GNSS Lab. has conducted a preliminary study for implementing WADGPS for 3 years (2002 to 2004), and has developed a Korean WADGPS test bed (KWTB). In this research, we secured core technology of WADGPS. Recently Korean government has resumed the project and planned to implement pseudolite-based augmentation system for demonstrating the feasibility of Korean Satellite Based Augmentation System (SBAS). The main goal of this project is to show the capability of Korean WADGPS using the pseudolite and existing NDGPS infrastructures in real-time. This project is scheduled for 2010 to 2014 under the contract with the Ministry of Land, Transport and Maritime affairs (MLTM). After that, Korea will launch a geostationary multifunctional satellite with a navigation payload which will be broadcasting augmenting signals for GPS. In this paper, milestones of Korean WADGPS development project will be described. Also system architecture of Korean PBAS using NDGPS infra structures will be described. To investigate system performance, real-time field test results conducted by commercial receiver will be presented.