GLONASS Stands for Global Navigation Satellite System. It is radio-based satellite navigation system operated for Russian Govt by the Russian Aerospace Defence forces. It provides an alternative to US’s Global Positioning System.
The Global Navigation Satellite System (GLONASS) is based on a constellation of active satellites which continuously transmit coded signals in two frequency bands, which can be received by users anywhere on the Earth’s surface to identify their position and velocity in real time based on ranging measurements.