Comparison of satellite positioning augmentation messages broadcast from Michibiki and Galileo

Abstract

The Quasi-Zenith Satellite System, nicknamed Michibiki, broadcasts not only navigation signals but also messages to improve its accuracy. On the other hand, the European navigation satellite system, Galileo, has also begun broadcasting messages to improve accuracy. Both broadcast messages in Compact SSR format to improve accuracy, but the actual message format differs greatly between them. The differences between them are summarized here. In addition, with the created message decoders as open source and software-defined radio, both signals are actually received, and the augmented information are compared in this letter.