Improved operational autonomy is required for the operation of any single satellite within a LEO satellite network. One onboard function, which is an interesting candidate to be implemented with an increased level of onboard autonomy is apparently the navigation function, which is in charge of the determination of the instantaneous satellite orbital position and attitude. This paper aims to dem...

With the advances and modernization of GPS, GLONASS, BDS, Galileo QZSS, multi-frequency multi-system joint positioning has become mainstream navigation. Therefore, it is great importance to perform a comprehensive assessment signal quality performance multi-GNSS. In this work, we used multi-GNSS observation data collected by Multi-GNSS Experiment (MGEX) International GNSS Service (IGS), Hong Ko...

Although Global Navigation Satellite Systems (GNSS) positioning can achieve high accuracy in line-of-sight conditions, multipath remains a dominant source of error. Multipath occurs when the reflected signals reach receiver addition to direct ones. Different systems design impact effect, such as signal modulation and chipping rate. In context multifrequency multi-constellation scenario that we ...