Product Description
When undertaking multibeam and sidescan sonar surveys with the BlueBoat (e.g., using the Cerulean Sonars), accurate positioning and heading information is vital to obtain high-quality survey data. The included Holybro UM982 Dual Antenna RTK GPS provides high-precision positioning information and is capable of generating non-magnetometer moving baseline yaw determinations for the BlueBoat with one single GPS module.
Compass-less YAW information is provided to the BlueBoat (commonly called GPS Heading or Moving Baseline Yaw). Using this GPS derived yaw source mitigates magnetic interference from the vehicle motors and electrical systems and any environmental interference sources, such as metallic structures or equipment, that can cause incorrect yaw reports to BlueBoat. This works even if the GNSS is not receiving RTCM data from a fixed RTK station or NTRIP server.
The device is based on the Unicore UM982 NMEA GNSS module and supports RTK positioning adjustment for centimeter-level accuracy, using multiband GPS, GLONASS, Beidou, Galileo, and QZSS global positioning systems.
Features
- Dual antennas allow Moving Baseline Yaw (GPS Heading) with just one module.
- Can replace the standard compass/magnetometer onboard the BlueBoat or be configured to be the primary source for heading whilst retaining the existing compass as a back-up.
- Perfect for systems/environments with high magnetic interference.
- Excellent RTK performance for accurate positioning.
- All equipment is mounted within the BlueBoat hull, eliminating risk to the vessel water-proofing and integrity.
- Includes all items required to fit to the BlueBoat and full instructions.
GNSS Specification
- GNSS:
- BDS B1I/B2I/B3I
- GPS L1C/A/L2P (Y)/L2C/L5
- GLONASS L1/L2
- Galileo E1/E5a/E5b
- QZSS L1/L2/L5
- Antennas Peak Gain (MAX): 2dBi
- LNA Gain (typical): 33±2dB
- Time-TO-First Fix:
- Cold start: ≤ 30s
- Hot start: ≤ 5s
- Data and Update Rate:
- 20 Hz Positioning & Heading
- 20 Hz Raw Data observation
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