At the minimum, the stream must contain all messages RTCMadds ephemeris information, provides orbit updates, and can be used for faster locking signals. Versionor Version in the case of this specific revision) describes messages and techniques for supporting GPS and GLONASS operation with one reference station or a network of reference stations RTCMadds ephemeris information, provides orbit updates, and can be used for faster locking signals. The GPS and GLONASS ephemeris were first expanded in