CORS (Continuously Operating Reference Station) - An installation of GNSS receiver that is precisely located and continuously observing GNSS data. Arrays of CORS are often linked together as part of a network to deliver precise positioning solutions over large areas.
DGNSS Differential GNSS - A basic method of processing GNSS data to achieve submeter level accuracies (often referred to as DGPS).
GNSS (Global Navigation Satellite System) - A global network of satellites producing navigation signals for positioning and navigation applications on earth.
VRS (Virtual Reference Station) - A method of NRTK which generates virtual data from data collected at nearby CORS for a specified location.
MAC (Master Auxiliary Concept) - A method of NRTK which provides CORS data with correction parameters generated from nearby CORS in order to optimise the solution for a specified location.
NRTK Network RTK - An enhancement of RTK which utilises data from multiple CORS to provide a uniform level of accuracy across the network.
NTRIP (Networked Transport of RTCM via Internet Protocol) - A method for streaming RTCM messages over the internet.
RINEX Receiver Independent Exchange - An international standard for the storage of GNSS data.
RTCM (Radio Technical Commission for Maritime) Services -An international standard for real-time data streaming of GNSS data.
RTK (Real Time Kinematic) - A sophisticated method of processing GNSS data to achieve centimetre level accuracies in real time.
APC - Antenna Phase Center
ARP - Antenna Reference Point
CSRS-PPP - Online Precise Point Positioning (PPP) Service
GDOP - Geometric Dilution of Precision
GLONASS - Globalnaya Navigatsionnaya Sputnikovaya Sistema or Russian Global Navigation Satellite System
GNSS - Global Navigation Satellite System
GPS - Global Positioning System
HI - Height of Instrument. In RTK this refers to the distance from the physical point to the Antenna Reference Point (ARP)
HPN - Provincial High Precision Networks
NAD83 - North American Datum 1983
PDOP - Positional Dilution of Precision
RINEX - The Receiver Independent Exchange Format
RTK - Real-Time Kinematic
RTN - Real-Time Network