Lecture
This lecture covers the evolution of GNSS signals and frequencies, including the permanent network, satellite tracking, and the growth of the GNSS market. It discusses the modulation principles, satellite health, atmospheric corrections, and the different sequences assigned to GPS satellites. The lecture also delves into the status and modernization of various GNSS systems such as GPS, GLONASS, and Galileo, highlighting the performance, signal types, and satellite constellations. Additionally, it explores the future developments in satellite tracking technology, the introduction of new signals, and the compatibility and interoperability of GNSS systems.