THE METHOD TO OBTAIN POSITION USING GNSS AND RFID FOR REALIZATION OF INDOOR AND OUTDOOR SEAMLESS POSITIONING

To obtain indoor positioning by using GPS (GNSS) satellite is difficult now. Additionally it is difficult to obtain high accuracy outdoor position when GPS receiver cannot find four or more GPS satellites in the viewing field of sky. The Japanese Government executed a new law NSDI (National Spatial Data Infrastructure) for a spatial information society on May 30, 2007. In this law, everybody can know positional information in real time, anytime and anywhere. In addition, it is necessary to use satellite positioning for realization of seamless positioning, and to promote ubiquitous network technology. Realization of advanced geospatial information society will achieve by creating condition which can obtain positional information anytime and anywhere. However, those technologies have not been established yet. Our laboratory conducted seamless positioning experiment to verify whether it can obtain position seamlessly by using VRS-GPS (Virtual Reference System-GPS),QZSS(LEX signal) and RFID (Radio Frequency Identification) for realizing an advanced spatial information society. Especially, QZSS was launched in 2010 by JAXA and is satellite system taken by a combination of multi orbit plane and each satellite deployed to appear constantly 1 satellite near the zenit