Global Navigation Satellite Systems
A Global Navigation Satellite System (usually referred to as "GNSS") is a constellation of satellites that emits radio-frequency signals.
Galileo will be Europe´s global navigation satellite system, providing a highly accurate, guaranteed global positioning service under civilian control.
The United States Global Positioning System is a space-based global navigation satellite system that provides reliable positioning, navigation and timing services to civilian and military users on a continuous worldwide basis.
GLONASS is a radio-based satellite navigation system operated for the Russian government by the Russian Space Forces.
The BeiDou Navigation Satellite System - also known as Beidou-2 - is a project by China to develop an independent global satellite navigation system. It is not an extension to the previously deployed Beidou-1.
The European Geostationary Navigation Overlay Service is the first pan-European satellite navigation system.
Multi-functional Satellite Augmentation System is a Japanese Satellite Based Augmentation System.
The Wide Area Augmentation System is an air navigation aid developed by the Federal Aviation Administration to augment the Global Positioning System.
The Indian Regional Navigational Satellite System is an autonomous regional satellite navigation system being developed by Indian Space Research Organisation (ISRO).
The Quasi-Zenith Satellite System is a proposed three-satellite regional time transfer system and enhancement for the Global Positioning System.
GNSS satellites send their signals in a specific radio-frequency band. The signals are normally pseudo-random noise (PRN) spread-spectrum signals that are transmitted in micro-wave frequency bands.
GPS simulation is part of the more general GNSS simulation. Here GPS signals are generated exclusively.
In a multi-GNSS simulation several GNSS constellations with the signals of their satellites are simulated for a static or kinematic user.
A Global Navigation Satellite System involves a constellation of satellites orbiting at about twenty thousand kilometers altitude over the earth surface.
GNSS Receivers process the Signals in Space (SIS) transmitted by the satellites, being the user interface to any Global Navigation Satellite System.
GNSS applications are applications that use GNSS systems for it their functionality.