GNSS/INS is a hybrid navigation system that combines the use of Global Navigation Satellite Systems (GNSS) with an Inertial Navigation System (INS). GNSS is a satellite-based navigation system that allows a receiver to determine its location by receiving signals from multiple satellites. INS is a self-contained system that uses accelerometers and gyroscopes to measure the movement of an object and calculate its position and orientation. By combining the two systems, GNSS/INS can provide highly accurate and reliable navigation information in a variety of environments, including areas where GNSS signals may be weak or unavailable. GNSS/INS is commonly used in applications such as aviation, marine navigation, and autonomous vehicles.