ANALYSIS OF IONOSPHERIC INFLUENCE ON BASELINES OF MEDIUM LENGTH

Abstract

Three-dimensional GNSS positioning is appli­ed today in many areas where high accuracy of spatial data is required. Great efforts are being made to model as accurately as possible the various sources of positioning errors with the aim of further improving accuracy. The paper analyzes the influence of different ways of iono­sphere modeling on the accuracy of GNSS positioning. The test was performed on medium-length baselines using three ionosphere models implemented in the RTKLib open source program. The measurements were performed during three different days, so that two polygons were formed. The comparative analysis was performed on the basis of non-closing of the polygon before and after the alignment of the GNSS measurements.