The Master Auxiliary Concept is a standardised method used to generate and send Network RTK corrections.
Janssen (2009) describes it as designed to transmit all relevant corrections data from a CORS network to the rover
in a highly compact form.
In this concept, a full correction and coordinate information is sent only for a single reference station (the master station) while the other stations in the network (auxiliary stations) only transmit correction differences and coordinate differences. This allows a reduced volume of data to be transmitted