IMPROVEMENT METHOD OF POSITIONING ACCURACY BY SATELLITE SELECTION BASED ON SATELLITE VISIBILTY EVALUATION USING 3D CITY MODELS

Abstract

 The Global Navigation Satellite System (GNSS) is expected to be utilized in construction fields such as civil engineering construction. It is possible to use in urban areas in the future, but the data obtained by GNSS tends to decrease accuracy in places where shields such as high-rise buildings exist etc. In this research, in the shielding environment such as this In order to improve the accuracy of high precision multi GNSS data, we aim to verify the satellite selection method based on visibility evaluation using 3 dimensional urban model. As a result of analyzing the acquired data in the shielding environment from the ratio of Fix solution, improvement of accuracy was confirmed according to shielding conditions.