Plain English Meaning

GLONASS is Russia's version of GPS. It is a separate group of satellites that tells a receiver where it is, how fast it is moving, and the exact time. Some aviation and consumer receivers use it alongside GPS to get a better, more reliable position fix.

Full Definition

GLONASS is the satellite-based radio navigation system operated by Russia, providing worldwide position, velocity, and time information to suitably equipped receivers. It performs the same basic function as the United States' GPS and operates as an independent constellation of satellites in medium Earth orbit. Many modern multi-constellation receivers use signals from both GPS and GLONASS satellites simultaneously to improve position accuracy and signal availability.

Context Anchor

Seen in GPS and satellite navigation discussions, especially when comparing the satellite an receiver may be able to use.