Since its implementation in the 1960s, satellite navigation has proven to be a critical asset to both military and civil operations, providing users with accurate and real-time location data. Even standard consumers benefit daily from satellite navigation technology in the form of GPS on their phones. Although the GPS is the most widely used satellite-based navigation system available, there are several other variants used by particular countries around the globe that provide a similar level of functionality. In this blog, we will discuss the history and operating principles behind satellite navigation while also explaining the several systems currently in use.