Differential Global Positioning System(dgps)

Global Positioning System (GPS) & Differential Global Positioning System(DGPS)

The Global Positioning System (GPS) is a satellite-based navigation system made up of a network of 24 satellites placed into orbit by the U.S. department of Defense.  GPS was originally intended for military applications, but in the 1980s, the government made the system available for civilian use.  GPS works in any weather conditions, anywhere in the world, 24 hours a day. There are no subscription fees or setup charges to use GPS.

Three Segments: 2. Space Segment 3. Control segment 4. User segment

DGPS: Differential GPS is a method of increasing the accuracy of positions derived from GPS receivers.

Working of DGPS: It is assumed that any two receivers that are relatively close together will experience similar atmosphere errors. DGPS receiver be set up on a precisely known location.The difference is applied to the GPS data recorded by second GPS receiver, which is known as the roving receiver