Filter
Top Products
AgGPS 332 GPS Receiver User Guide 11
Overview 2
Subscription-based corrections
The AgGPS 332 receiver uses OmniSTAR XP/HP or OmniSTAR VBS
differential corrections in the same way that it uses WAAS/EGNOS
corrections but are provided on a subscription basis.
The corrections that are produced by OmniSTAR XP/HP algorithms are
more accurate than the corrections that are produced by OmniSTAR
VBS algorithms. The accuracy of the positions reported using
OmniSTAR HP/XP increases with the time that has elapsed since the
instrument was turned on. This process is called convergence.
Convergence to where the error is estimated to be below 30 cm
(approximate 12 inches) typically takes around 20 minutes. Factors that
influence the time to convergence include the environment, the
geographical location and for OmniSTAR HP, the distance to the
closest OmniSTAR corrections base station. OmniSTAR is continually
improving this service. OmniSTAR XP is not dependent on distance to
base station
For more information about OmniSTAR, go to the OmniSTAR website
at www.omnistar.com. Alternatively, call 888 883 8476 (USA or Canada).
For information about activating an OmniSTAR subscription, go to the
OmniSTAR website (www.omnistar.com) or call 888-883-8476 (USA or
Canada).
24.3 Autonomous GPS positioning
Autonomous GPS positioning uses no corrections. The rover receiver
calculates its position using only the GPS signals it receives. This
method does not have high absolute accuracy, but the relative accuracy
can be comparable depending on geographic location and overall
environment.