DGPS is one of two widely used methods to augment the accuracy of the GPS.

Most GPS chips will follow the NMEA standard so that is usually the preferred way of parsing both GPS and DGPS data. Check out the related links for a link to the NMEA GPS standard.

Newer Garmin GPS receiver WAAS (Wide area augmentation system) capability can improve accuracy, averaging less than three meters. No additional equipment or fees to take advantage of WAAS. Users can also get a better differential GPS (DGPS), to correct an average of three to five meters accuracy of GPS signals within range. To get the corrected signal, users must be out by the differential GPS beacon receiver and beacon antenna.

Now we use the following GPS receiver for our bus railway system.

you have to go these steps:

1.Configure the radios in Utilities icon-radio configuration-set to factory

2.Go to fast survey icon-equip-dgps configuration-select uhf mode(for rover and base)

3.configure base-equipe base configuration-from new position-use local coordinates-tap the coordinates then OK

4.Configure the rover-rtk initialization-known point initiazlization-from known position-use local coordinates-go back to the menu-go to store point and wait for the fixed solution. mili_b_boy@hotmail.com