Differential Global Positioning System (DGPS) is an enhancement to Global Positioning System that provides improved location accuracy, from the 2-meter nominal GPS accuracy to about 10 cm in case of the best implementations.
We use the following best techniques to achieve high precision accuracy
- Static and Kinematic GPS surveying techniques: High precision techniques based on post processing of carrier phase measurements.
- Differential GPS (DGPS): instantaneous low to moderate accuracy positioning and mapping technique based on pseudo range measurements.
- Real - Time Kinematic (RTK): versatile high precision techniques that use carrier phase measurements in an instantaneous positioning mode.
The DGPS & RTK techniques, because they are able to deliver results in real time, are very powerful GPS positioning technologies.