DGPS can improve position accuracy to between 1 and 3 meters

DGPS otherwise known as Differential GPS is an extension of GPS that takes advantage of the use of land-based radio beacons to transmit satellite position corrections to Differential GPS receivers. Approximately 60 broadcast stations, including two control centers, have been established by the United States Coast Guard. These stations recalculate the effect of random error, propagation delay, ionosphere and troposphere irregularities, etc. and can improve position accuracy to between 1 and 3 meters. Most recreation-grade GPS units require the purchase an additional receiver antenna to access DGPS signals.

NAVCEN operates the Coast Guard Maritime Differential GPS Service and the developing Nationwide DGPS Service. The Service broadcasts correction signals on marine radiobeacon frequencies to improve the accuracy of and integrity to GPS-derived positions. The Coast Guard Differential GPS Service provides 10-meter accuracy in all established coverage areas.

Typically, the positional error of a DGPS position is 1 to 3 meters, greatly enhancing harbor entrance and approach navigation. The System provides service for coastal coverage of the continental U.S., the Great Lakes, Puerto Rico, portions of Alaska and Hawaii, and a greater part of the Mississippi River Basin. Many foreign nations are implementing standard Differential GPS services modeled after the U.S. Coast Guard’s system to significantly enhance maritime safety in their critical waterways.

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About The Author:

Heath Allison is a successful author and publisher at www.1st-at-gps-tracking.com. Recommending gps equipment and associated products
25-08-04