Step-by-Step Guide to Setting Up an RTK GPS Base Station
1. Select a Good Base Station Location
- Stable Surface: Choose a stable, non-movable surface to set up the base.
- Clear Sky View: Ensure an open sky view to minimize obstructions like trees, buildings, or hills that can block satellite signals.
- Nearby Rover(s): Place the base near the area where the rover units will be working to reduce signal degradation.
2. Set Up the Tripod and Antenna
- Tripod Placement: Place the tripod on the selected spot and ensure it is level. A secure base minimizes vibration or movement that could affect accuracy.
- Mount the Antenna: Securely attach the antenna to the tripod. If the antenna needs height input, measure from the ground to the antenna center and record the height accurately.
3. Turn on the Base Receiver and Configure Settings
- Power On: Switch on the base receiver and let it initialize.
- Coordinate Setup: You may set the base at a known point (if using survey-grade control) or use the GPS to average its position over several minutes for new points. For known points, input the exact coordinates; for new points, record the calculated location coordinates.
- Elevation Mask & Satellite Settings: Set the elevation mask (commonly 10-15 degrees) to exclude low-angle satellites that may degrade accuracy. Enable all available satellite constellations for improved precision.
4. Configure RTK Settings
- Radio Link Setup: Configure the base’s radio settings to send RTK corrections to the rover. Ensure the frequency and baud rate match the rover’s settings.
- Correction Protocol: Select a correction protocol, such as RTCM or CMR, which should be compatible with your rover system.
- Transmit Power: Adjust transmit power based on the distance and terrain between the base and the rover(s).
5. Start Broadcasting Corrections
- Broadcast Mode: Set the base station to begin broadcasting correction data to the rover(s).
- Monitor Signal Quality: Check the signal quality and status to ensure a stable connection between the base and the rover(s).
6. Verify Accuracy on the Rover
- Test RTK Fix: Move the rover to several points and check if it achieves an RTK fixed position. Verify that the rover’s measurements align accurately with known reference points if available.
- Monitor for Consistency: Confirm that the rover maintains consistent, accurate readings throughout the project area.
watch this video if you want to know the external configuration of Topcon GPS
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