DGPS Abbreviation

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Popular abbreviations of DGPS:

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What does DGPS mean?

The complete form of DGPS is Differential Global Positioning System. It is an advanced form of GPS (Global Positioning System) navigation. DGPS was designed to curb the problem of signal degradation, and the DGPS system aids in the improvement of location accuracy. The DGPS system works on the principle that the same atmospheric errors will be experienced by the two receivers who are close enough to each other.

• GPS, and DGPS both are used for satellite-based navigation. 
• The accuracy range of DGPS is around 10 cm of distance.
• The difference between the actual and theoretical distances is calculated as DGPS.
• DGPS gives more accuracy than GPS.
• When the distance between the ground-based transmitters and the instrument starts increasing, then the accuracy of DGPS starts decreasing and vice-versa.

There are two types of DGPS

1. Wide area augmentation system (WAAS)
2. Local-area augmentation system (LAAS)

Advantages of DGPS

• DGPS aids in the accuracy of GPS.
• DGPS helps to identify the exact location on the earth.
• DGPS provides the actual data in significantly less time.
• DGPS helps in removing the pseudo-range errors from the GPS signals.

Disadvantages of DGPS

• We need to install more DGPS systems to cover more area.
• DGPS has some logical errors such as noise, orbital errors etc.
• When there is high ionospheric variability, the DGPS accuracy gets minimum.

Difference between GPS and DGPS

• GPS: It uses WGS84, and it works internationally. Its frequency is between 1.1GHz to 1.5 GHz, and it is very cost-effective and allows only one receiver.
• DGPS: It uses the local coordinate system and works in the local location. The frequency of DGPS depends on the service provider.