Assessment of Precise Point Positioning of Different Global Navigation Satellite Systems. (Dept.C)

Abstract

This technique limits the demand to keep an expensive regional network of reference stations.Obtaining high accuracy of positioning is attainable because of the utilization of specific products International GNSS Service offered (IGS), such as the Earth Rotation parameters, Satellites Orbits accessed at intervals of 15 minutes, and Satellites Clocks with an interval of 30 seconds.Moreover, many global navigation satellite systems (GNSS) PPP are another effective way of achieving higher accuracy and lower convergence periods through an increasing number of observations from several constellations [2].Recently, multi-GNSS has gone through accelerated advancement, and several studies have illustrated its performance.The combined GPS and GLONASS PPP were first investigated because of the availability of GNSS satellites.The results showed a significant improvement in the convergence time of position, although the improvements rely heavily on the geometry of the visible satellite configuration.The results also indicate a minor increase in positioning accuracy because GLONASS satellites have limited availability [3].PPP (Precise Point Positioning) model is currently being implemented with the co-existence of the four