Ag Leader GPS 5200 User Guide - Manual (Page 18)

2 Overview
16 GPS 5200 Receiver User Guide
The corrections that are produced by OmniSTAR HP algorithms are
more accurate than the corrections that are produced by OmniSTAR
VBS algorithms. The accuracy of the positions reported using
OmniSTAR HP 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 the distance to the closest OmniSTAR
corrections base station. OmniSTAR is continually improving the
service.
For more information about OmniSTAR, go to the OmniSTAR website at
www.omnistar.com . For information about activating an OmniSTAR
subscription, see OmniSTAR, page 33 .
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
is comparable to the other methods.
GPS5200_1A_UserGuide_ENG.book Page 16 Friday, December 19, 2008 12:57 PM