Since RTK works in base / rover pair, using only one set of UPM-Std Kit as RTK rover, you’ll need to have access to public or private RTK base station with Virtual Reference Station (VRS) service in order to get 1cm + 1ppm horizontal position accuracy. Alpha is compatible with popular Trimble and Leica RTK base stations.
RTK initialization time performance of Alpha is on similar level as other single frequency RTK receivers such a NEO-M8P, REACH RS+, REACH M+, … etc, taking longer time than more expensive dual-frequency RTK receivers.
If you choose to setup your local RTK base station with another set of UPM-Std Kit, then GPS/Beidou RTK instead of GPS/GLONASS RTK can be used. Over Vietnam there are 20 ~ 25 GPS/Beidou satellites, the RTK initialization time will be extremely fast, under 30 seconds on average.
Public or private base station are GPS/GLONASS type, there are 9 ~ 18 GPS/GLONASS satellites over Vietnam over 24hr period, so RTK initialization will take longer time when satellites are fewer.