Software simulation of multiple Global Navigation Satellite System measurements

The research discussed in this paper addresses the question of how to simulate realistic observables from current and pending Global Navigation Satellite Systems (GNSSs) in a way that is independent of the characteristics of specific systems. The generated observables can be used to predict future multi-GNSS performance and aid in the development of enhanced processing algorithms. This paper introduces a software simulator package called Multi-GNSS Observables Simulator (MGOS), which has been developed to generate pseudorange and carrier-phase measurements for the GPS, GLONASS, Galileo and Compass constellations. The key component of MGOS is its error source library. It has been developed to simulate the most common GNSS errors (such as orbit, atmospheric, clock, and hardware errors) for all aforementioned GNSSs.