Trimble ProPoint Engine: Next-Generation Centimeter Positioning and Orientation 9
GNSS/INS performance
The following results are from an analysis of a 13 km suburban drive with the system running in
GNSS/INS(RTK), which starts near the base station and ranges out to about 9 km away from the
base station. A significant improvement is seen in the 95% error ellipses of the horizontal
positioning, shown for ProPoint in blue. This is the difference between the real-time GNSS/INS
positions and a high-accuracy, post-processed truth trajectory using an Applanix POSLV system
(high-end IMU system).
Similar improvements are seen in the vertical performance. Looking at the Cumulative Distribution
Function, clear improvements can be seen in the plot of the error in the height component. With
the previous-generation GNSS/INS engine, 95% of the heights (the 95 percentile) fell within 78 mm
of truth, now with the ProPoint engine, 95% of the heights fall within 23 mm of truth.
Conclusion
The Trimble ProPoint engine is an investment in the future, ready to fuse present and future GNSS
measurements with inertial and sensor data to deliver premium performance in the toughest of
environments. If accuracy, availability and integrity are key requirements for your application, then
ProPoint is the ideal choice.
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