What is Differential GPS/GNSS primarily used for?

Differential GPS (DGPS) or Global Navigation Satellite System (GNSS) is fundamentally designed to enhance the accuracy of satellite positioning systems. By using a network of fixed ground reference stations that compare their known positions with the computed positions from satellite signals, DGPS can calculate correction factors and broadcast these adjustments to nearby receivers. This results in improved positional accuracy, often achieving a precision of up to a few centimeters, compared to standard GPS accuracy which can typically range from five to ten meters under ideal conditions.

In aviation, enhanced accuracy is crucial for navigation, approach procedures, and landing operations, where small positional errors can lead to significant ramifications. Thus, the primary use of DGPS/GNSS lies in its ability to augment satellite signals, providing pilots with a more reliable and precise navigation tool that is essential for safe flying.

Fuel consumption calculations, wind speed measurements, and emergency landing instructions do not directly correlate with the primary function of DGPS/GNSS. While these aspects are indeed important in aviation operations, they rely on different systems and calculations outside the scope of what DGPS/GNSS technology specifically provides.