Whitepapers

Trimble ProPoint Engine: Next-Generation Centimeter Positioning and Orientation 7 For applications where most of the sky is blocked, the integration of IMU measurements into the engine offers the best solution. The ProPoint engine tightly integrates the available GNSS and IMU measurements, delivering centimeter-level accuracy and orientation during these events. The latency of the computed results is also an important factor in autonomous vehicle control. A position may be very accurate but if it is delayed, then it has little value to system performance and safety. The ProPoint engine produces positions and orientations with less than 20 milliseconds latency at update rates up to 100 Hz. Availability It has long been a goal of Trimble to deliver centimeter-level precision for everyone, everywhere. Allowing our customers to operate in more difficult environments expands the variety of potential applications and gives a better return on investment for the end user of the technology. ProPoint in GNSS-only and GNSS/INS modes delivers centimeter-level accuracy in denser tree canopy and high-rise urban environments where historic engines would struggle. Both on-road and off-road vehicles operating close to buildings or under bridges continue to achieve close to 100% availability of position and orientation. Users in RTK mode benefit from the integrated xFill technology to allow continued operation when the correction source is lost. This boosts availability over what can be achieved by RTK users who are not leveraging Precise Point Positioning (PPP) technology to bridge loss of corrections from the local base. Integrity Providing accurate precision estimates is critical to centimeter-level control of autonomous machines. Applications depend on these horizontal and vertical indicators to know when to trust the position and orientation information. An incorrect estimate can result in damage to the end product, equipment, or at worst, personnel.

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