Using RTCM ephemeris data to speed up Time To First Fix (TTFF)
RTCM1019 (GPS Ephemeris) and RTCM1020 (GLONASS Ephemeris) can be sent to the receiver to speed up acquisition of satellites. This can in turn, speed up Time To First Fix. For example, if you access a wireless service with these messages, the NovAtel receiver can utilize the ephemeris information immediately rather than waiting for a satellite to be acquired and its almanac data processed.
To do this:
1. Choose a receiver port to send corrections to and set the interfacemode to RTCM:
E.G. INTERFACEMODE COM2 RTCM NONE OFF
2. Send RTCM1019 and/or 1020 to this port.