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Sea Surface Height Measurements Based on Multi-Antenna GNSS Buoys
Xiaoming Xue1,2, Jichao Yang2, Qing Zhao2
1College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao 266590, China.
Sensors (Basel, Switzerland)
|June 19, 2024
Summary
A novel four-antenna Global Navigation Satellite System (GNSS) buoy accurately measures sea level and buoy attitude, improving coastal monitoring. This technology enhances sea level data accuracy by correcting for buoy movements, crucial for climate change studies.
Area of Science:
- Oceanography
- Geodesy
- Climate Science
Background:
- Satellite altimetry faces coastal inaccuracies due to instrumental and geophysical factors.
- Global Navigation Satellite System (GNSS) buoys offer flexible, high-precision sea surface height measurements.
- Understanding buoy motion via attitude measurements is vital for data reliability.
Purpose of the Study:
- To design and deploy a four-antenna GNSS buoy for offshore sea level monitoring.
- To assess the buoy's capability for simultaneous position and attitude measurement.
- To improve sea level data accuracy through attitude correction.
Main Methods:
- Deployment of a four-antenna GNSS buoy near Jimiya Wharf, Qingdao.
- Processing GNSS data using Precise Point Positioning (PPK) for sea surface height time series.
- Calculating buoy attitude using multi-antenna technology and applying corrections.
Main Results:
- GNSS buoy achieved a root-mean-square error (RMSE) of 1.15 cm compared to radar.
- Attitude correction reduced the RMSE to 1.12 cm when compared to high ground radar.
- The system successfully acquired high-precision coastal sea level and buoy attitude data.
Conclusions:
- The four-antenna GNSS buoy provides accurate coastal sea level data.
- Synchronous attitude measurement capability enhances data reliability and accuracy.
- Attitude correction significantly improves the precision of sea level monitoring.
Keywords:
GNSS buoyattitude correctionmulti-antenna GNSS attitude determinationsea surface height measurementMore Related Videos
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