Which GPS system is commonly used for global positioning?

The correct answer is WGS84, which stands for World Geodetic System 1984. This system is the primary reference framework used for GPS (Global Positioning System) applications worldwide. WGS84 provides a standard coordinate system for global positioning through latitude and longitude. It is essential because it integrates various geometric and dynamic features needed for high-accuracy positioning, thereby enabling users to determine their location with precision regardless of where they are on the globe.

In contrast, the other options represent local or regional geodetic systems. ED50 (European Datum 1950) is primarily used in Europe and is not suitable for global applications. The Tokyo Datum is specific to Japan, focusing on positioning within that region rather than on a global scale. Similarly, the Pulkovo System is utilized mainly in Russia and neighboring countries, making it inappropriate for worldwide GPS use. Therefore, WGS84 stands out as the universally adopted system for GPS that facilitates accurate global navigation and positioning.