What does DGPS mean in UNCLASSIFIED

DGPS is an enhanced version of the Global Positioning System (GPS) that provides more accurate positioning information. It uses a network of fixed ground reference stations to correct errors in the GPS signals, resulting in improved accuracy of up to 10 centimeters.

DGPS works by comparing the signals from multiple GPS satellites with the known positions of reference stations. The reference stations measure the errors in the GPS signals and transmit these corrections to users via radio beacons. The user's receiver then applies these corrections to the GPS signals, resulting in more precise positioning information.

DGPS offers several benefits, including:

• Improved positioning accuracy: DGPS significantly enhances the accuracy of GPS positioning, making it suitable for applications that require precise location information.
• Reduced multipath errors: DGPS minimizes errors caused by signal reflections from buildings and other objects, which can degrade GPS accuracy.
• Extended range: By correcting errors in the GPS signals, DGPS can extend the range of GPS reception, allowing users to receive GPS signals in areas where regular GPS may be unavailable.

DGPS is used in various applications, such as:

• Surveying and mapping: DGPS provides accurate positioning data for surveying and mapping tasks.
• Precision agriculture: DGPS enables precise navigation and guidance for agricultural machinery, optimizing crop yields.
• Marine navigation: DGPS provides accurate positioning for boats and ships, enhancing safety and efficiency.
• Construction: DGPS guides construction equipment, ensuring precise placement and alignment.

DGPS services are typically provided by government agencies or commercial service providers. To access DGPS services, users need to equip their GPS receivers with DGPS-compatible equipment and subscribe to the relevant service provider.