What network connects stations across the U.S. to provide differential GPS corrections?

The Continuous Operating Reference Station (CORS) network plays a crucial role in providing precise geographic positioning information. This network consists of a series of fixed GPS stations that continuously collect and transmit data related to GPS signals. The primary function of CORS is to offer differential GPS (DGPS) corrections, which enhance the accuracy of GPS measurements by correcting errors caused by atmospheric conditions, multipath effects, and satellite clock discrepancies.

By utilizing CORS, users can obtain real-time differential corrections for their GPS equipment, significantly improving positional accuracy to a few centimeters, as opposed to the typical accuracy of around 10 meters achievable with standard GPS. CORS stations are strategically located across the United States, allowing for widespread coverage and robust data collection, which is essential for various applications such as surveying, navigation, and geospatial analysis.

In contrast, the other options do not accurately describe a network that provides differential GPS corrections. A Geographic Data System refers more broadly to the organization and analysis of spatial data rather than a specific correction network. The Augmentation Reference Network is a term that could be used generally but does not pinpoint the established system providing these corrections. The Satellite Measurement System typically pertains to satellite techniques rather than a network of operating ground stations like CORS.