-GNSS satellite orbits Earth once every 11 hours, 58 minutes and 2 seconds at a medium-orbit altitude.

-Each satellite transmits coded signals which contain the satellite’s precise orbit details and a very stable time stamp from an atomic clock.

-While GNSS satellites vary in age and design, their principal operation remains the same.

-The satellites transmit two carrier waves in the L-Band referred to as L1 and L2. The carrier waves transmit information from the satellite to the earth.

-The carrier wave transmits information from satellite to earth.

-Most GNSS receivers have two parts — antenna and processing unit.

-The antenna receives satellite signals while the processing unit makes sense of it. To determine the position of the receiver it needs to collect information from a minimum of three satellites.

-When the receiver knows the precise position of itself with respect to each satellite, it translates its own position into an Earth-based coordinates system, thus gives the result in latitude, longitude and height.