Korea Aerospace Research Institute (KARI) has built a land transportation infrastructure system based on Global Positioning System (GPS) for real-time operation. The purpose of this system is to make correction and integrity information for users that are utilize single-frequency GPS receiver in urban area. The correction is made based on GPS carrier phase measurement. This system is divided into infrastructure and user part. The infrastructure is consisted of Global Navigation Satellite System (GNSS) permanent station, control station, and verification station. Each of the sub-systems have an individual equipment and these are connected by internet that can be available remote access, data transmission, etc. These system are composed of dual-equipment as needed. In this paper, the role and configuration of the sub-systems are explained.

Keywords: GNSS, infrastructure, real-time operation