Survey of India CORS Registration Portal

Some Abbreviations and Definitions

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 The 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.

Table of Acronyms :

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



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