Leica Geosystems GPS System 500 - Technical Reference Manual - Manual (Page 379)

379 Appendix K Technical Reference Manual-4.0.0en
DGPS
For real-time DGPS positioning, the
standard equipment employs either
public coastguard beacon or satellite
differential signal provided by Racal-
Landstar for differential corrections.
Both equipment set-ups are shown to
you in the Equipment Setup chapter:
Real Time Rover, GIS Rover. Both
require the use of GIS DataPRO
software. While the Racal-Landstar
signal provides global coverage
(except in the Polar Regions,) beacon
stations only broadcast the public
signal in certain areas.
2 With either
option, a typical accuracy of 40cm to
70cm can be expected, but is
dependent upon location.
Other DGPS sources are also
available depending on your location.
In most countries, one or more
sources of public signal should be
available. The GS50 / GS50+ is able
to work with any of these sources,
provided there is a radio or modem
capability to transmit the data in a
standard RTCM data format.
The GS50 / GS50+ is also capable of
transmitting standard RTCM
corrections in real-time.
1 Reasonable baseline length for best quality is
about 100km, depending on the atmosphereic
conditions. The measurement range for the
baseline length is >1000km.
2 For additional information on locations and
information please visit http://www.csi-
dgps.com