What are the bases used in Differential GPS (D-GPS) known for?

The bases used in Differential GPS (D-GPS) are known for being fixed in a precise location because they operate from known coordinates. These stationary reference stations continuously receive GPS signals and compare the information received with their own precise location. Any discrepancies between the two allow the fixed-base stations to calculate and broadcast correction signals to nearby D-GPS receivers. This process significantly enhances the accuracy of GPS readings for users in the vicinity.

The fixed nature of these bases is essential to providing reliable corrections, as their known positions allow them to generate accurate differential correction data. While mobility, portability, and adjustability are characteristics related to different types of GPS technologies or equipment, they do not apply to the fixed reference stations fundamental to the functioning of D-GPS. This stability enables real-time accuracy that is crucial for navigation and surveying applications.