COMPARISON OF POSITIONING ACCURACY WHEN COMBINED QUASI-ZENITH SATELLITE SYSTEM AND MULTIPLE GNSS DEPENDING ON THE DEGREE OF RADIO-WAVE SHIELDED ENVIRONMENT

Abstract

 Quasi-Zenith Satellite System (QZSS) is a Global Navigation Satellite System (GNSS) that is currently developing for improving the accuracy of satellite positioning in Japan. This study verified the positioning accuracy based on the combined use of QZSS and other GNSSs. In addition, the positioning results obtained by comparing different combinations of satellite positioning systems were evaluated to determine which combination of satellite positioning systems provides the most efficient and accurate positioning. As a result, under an open skies environment, the combination of the QZSS and GPS can provide stable and high positioning accuracy, but under a radio-shielded environment, it was found that the adding BeiDou or Galileo and using three GNSSs can improve positioning accuracy.