Differential gps positioning (dgps) – Ag Leader GPS 5200 User Guide User Manual
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GPS 5200 Receiver User Guide
15
Overview
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few seconds. While the receiver is initializing, an RTK Float solution is
generated. Once initialized, an RTK Fixed solution is generated. It is the
RTK Fixed solution that provides centimeter-level accuracy.
The parts per million (ppm) error is dependent on the distance
(baseline length) between the base and rover receiver. For example, if
the distance is 10 km, a 2 ppm error equals 20 mm.
For more information about RTK positioning, go to the Trimble website
at
Differential GPS positioning (DGPS)
For differential positioning, the GPS 5200 receiver uses corrections from
WAAS/EGNOS satellites or from OmniSTAR VBS or HP satellites.
These differential systems use special algorithms to provide differential
corrections that allow the rover receiver to calculate its position more
accurately.
Free corrections
WAAS/EGNOS corrections are free in North America and Europe. For
more information about WAAS, go to the Federal Aviation
Administration website at
.
For more information about EGNOS, go to the European Space Agency
website at
Subscription-based corrections
The GPS 5200 receiver uses OmniSTAR HP or OmniSTAR VBS
differential corrections in the same way that it uses WAAS/EGNOS
corrections.
OmniSTAR corrections are provided on a subscription basis.
GPS5200_1A_UserGuide_ENG.book Page 15 Friday, December 19, 2008 12:57 PM