A way of collecting Global Positioning Systems data with increased accuracy. It involves using a fixed base station at a known position to help find the location of a roving receiver.
A system to precisely determine the location of the DGPS receiver. This system uses a known stationary GPS receiver to track the same GPS signals as those picked up by adjacent receivers. Using FM radio transmissions, the system transmits error corrections to those receivers. [Section 1.4
A system devised initially by the U.S. Coast Guard to improve GPS accuracy levels to within 5 meters. It employs a land based, fixed position, DGPS reference receiver to first calculate the Selective Availability errors, then transmit the necessary correction factors to mobile GPS receivers in the area. DGPS system does require an added beacon receiver to communicate with the standard GPS unit.
using data from at least four (4) GPS signals, this method of GPS corrects for a designed random error to achieve a more precise location, usually within 2 meters. This system utilizes a fourth location signal from land based signal towers maintained by the US Coast Guard to enhance the accuracy of GPS for navigation on the waterways.
A technique in which data from a receiver at a known location (base or reference) is used to correct the data from a receiver at an unknown location (rover). DGPS is used to increase the precision of the resulting position of the rover. Also applies to GLONASS.
(DGPS) A system of beacons which broadcasts signals to help increase the accuracy of GPS positioning.
An extension of the GPS system that uses land-based radio beacons to transmit position corrections to GPS receivers. DGPS reduces the effect of selective availability, propagation delay, etc. and can improve position accuracy to better than 10 meters.
A form of GPS which uses additional data from fixed and roving receivers to reduce plotting errors and obtain more accurate positioning.
Reference stations provide correction signal to users based on difference between known reference position and GPS calculated position.
A highly accurate global positioning system (GPS) that utilizes a differential radio beacon and receiver to compute and correct the error of all visible satellites sending data to a conventional GPS unit.
Single point code positioning with pseudorange corrections applied from simultaneous observations at a known position. One to ten meter accuracy is typical.
A method of correcting for errors in GPS coordinates by using two receivers, one to rove and collect position data, the other to remain stationary at a known position to collect correction data that is transmitted to the roving receiver (or supplied to it at a later time).
A technique used to improve the accuracy of the GPS. DGPS reduces the effect of selective availability, propagation delay, etc. and can improve position accuracy to greater than 10 meters.
A method using land-based radio signals broadcast from ground stations to transmit positions corrections to GPS receivers to improve position accuracy. DGPS overcomes Selective Availability.
A global positioning system used with Inmarsat terminals and based on GPS satellites, with accuracy enhanced by the use of transmission of differential corrections from suitably located shore-based radio beacons.
Differential Global Positioning System (DGPS) is an enhancement to Global Positioning System that uses a network of fixed ground based reference stations to broadcast the difference between the positions indicated by the satellite systems and the known fixed positions. These stations broadcast the difference between the measured satellite pseudoranges and actual (internally computed) pseudoranges, and receiver stations may correct their pseudoranges by the same amount.