Influence of orbit and clock file diversity on GNSS ambiguity resolution

Abstract The continuous and accurate determination of positions, velocities, and time in Global Navigation Satellite Systems (GNSS) fundamentally relies on the precise knowledge of satellite orbits and clock information. These critical components, commonly referred to as orbit and clock files, serve as the backbone of GNSS systems such as GPS, GLONASS, Galileo, and others. They play an essential role in enabling high-accuracy positioning services for a wide range of applications, including navigation, mapping, scientific research, and time synchronization. A clear understanding of the principles and functionality of these orbit and clock files is paramount for comprehending the intricate mechanisms that underpin GNSS systems and their profound impact on positioning accuracy. This study provides a comprehensive exploration of GNSS systems with a particular focus on accuracy enhancement. The research primarily aims to elucidate the pivotal role played by a diverse array of organizations in supplying accurate and reliable orbit and clock files. By examining the multifaceted contributions and effects of these entities, the investigation unveils the complex processes through which GNSS accuracy is elevated to unprecedented levels. The findings underscore the indispensable contributions of these organizations in advancing the precision and reliability of GNSS technologies, thereby highlighting their critical importance in supporting the ever-growing demands of global positioning and timing applications.