What is GNSS?
GNSS stands for Global Navigation Satellite Systems. Currently the United States operates only fully operational GNSS - Global Positioning System (GPS), with a constellation of at least 24 navigation satellites operational at all times. The Russian GLONASS system follows closely in operation, while the Chinese and Europeans are currently developing their own systems, Beidou/Compass and Galileo, respectively. Other countries, such as India and Japan, have regional augmentation systems to support greater positioning, navigation, and timing of the GPS systems in their relative regions. With the increasing number of GNSS systems and ever increasing use of GNSS applications, there is a strong need to have all systems work together for interoperability and compatibility to ensure the safety of users. For more technical details on each system, please click here.