The HiPer XR GNSS receiver uses IMU integration to improve RTK accuracy for real-time attitude awareness. It supplies setup and operation guidelines for optimal rover performance and data precision.
Real-Time Kinematic (RTK) operation gives centimeter-level accuracy through the correction of errors in the GNSS system. A source of GNSS corrections from a local base station or a network of base stations is necessary for RTK operations. The Topcon HiPer XR GNSS receiver with TILT technology increases the accuracy of GNSS-only RTK operation through integration of GNSS and IMU sensor data. This enables real-time awareness of system attitude. The HiPer XR accurately calculates the tip position of the range pole when the rover is vertical or tilted.
This overview includes the principles of rover operation, with guidance for optimal location selection and equipment setup.
The HiPer XR RTK rover, which moves between measurement or stakeout points, connects to a base station to get RTK differential corrections through:
- The integrated radio modem
- The integrated LTE cellular modem
- A network connection from the Field Controller
- LongLink Bluetooth
Obey the setup guidelines for good rover operation:
- Put the receiver in a location with a clear view of the sky from all angles. Be careful when you attach the antenna near vertical blockage, for example, structures, tree canopies, and overhead transmission lines. These can have an effect on how the rover monitors GNSS signals.
- A minimum of five satellites is necessary for RTK positioning.
- For centimeter precision during the survey, communications between the base station and rover must stay ON. The base station and rover must also monitor equivalent satellite signals.
- Use GNSS planning software to identify optimal and unsatisfactory coverage times to schedule measurements, especially in GNSS environments with blockage and/or interference.
- When the receiver gets corrections through a radio modem, make sure that the RTK rover has a clear line of sight to the base station for radio reception. It is necessary to be near the radio for communication. During operation with a cellular modem for RTK corrections, know your network coverage and possible locations where cellular service is not available.
- Correct integrated IMU alignment is necessary for dynamic TILT compensation. This is done after the survey starts, or during the survey if alignment is lost. The alignment process is usually fast and frequently occurs automatically during usual rover operation. If alignment is temporarily lost, a realignment occurs, and the use of TILT can continue when the IMU has necessary dynamic data
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RTK rover setups to receive corrections
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General Rover Setup
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