User's Manual

Page 59
X360 GIS Reference Receiver User Guide
D. Glossary
communication links. It uses data from a network of stations to provide
corrections to each rover that are more accurate than corrections from a
single base station.
To start using VRS corrections, the rover sends its position to the VRS server.
The VRS server uses the station data to model systematic errors (such as
ionospheric noise) at the rover position. It then sends RTCM or CMR correction
messages back to the rover.