Convert calendar date and time to GPS Time
GPS Time is a continuous time scale used by the Global Positioning System (GPS) satellites to provide accurate timing information for navigation and synchronization purposes.
GPS Time is typically accurate to within a few nanoseconds. It's used for various applications such as navigation, surveying, telecommunications, and more.
GPS satellites have onboard atomic clocks that generate the GPS Time. Receivers on Earth use signals from multiple satellites to calculate their position and the current GPS Time. Triangulating the distances to satellites allows the receiver to determine its position.