What is the primary function of CORS in GPS?

The primary function of CORS, or Continuously Operating Reference Stations, is to serve as a ground-based method for achieving accurate GPS positioning. CORS consists of a network of stationary GPS receivers that collect data continuously and provide positioning corrections to GPS signals. These corrections enhance the accuracy of GPS measurements by accounting for various errors, such as atmospheric conditions and satellite clock inaccuracies.

CORS stations are particularly useful in applications that require high precision, such as surveying, geodesy, and environmental monitoring. By utilizing the real-time data from these reference stations, users can significantly minimize the typical errors associated with standard GPS systems, enhancing the overall reliability and accuracy of positioning information.

The other options, while related to GPS technology, do not accurately capture the specific and primary role of CORS, which is focused on improving the precision of GPS positioning through ground-based infrastructure.