measurement ensures minimal maintenance since the instrument does not contact the water.
Unlike the standard LX-80 sensor, which measures the distance to the water surface once per second, the oceanographic variant takes 10 measurements per second. The sampled 10 Hz waveform data can be transmitted in real time and stored internally for up to six minutes. This stored data is analyzed within the instrument to determine tidal and wave parameters such as mean sea level, minimum and maximum levels, significant wave height, wave periods, and various spectral wave components. Using a moving window sampling technique, the measured waveform data and extracted wave parameters are continuously updated with the latest observations.
Applications
The various applications of the Geolux LX-80 make it an invaluable tool for a range of environmental monitoring projects:
- Tidal Measurement: Mareographic stations require accurate tidal The LX-80’s high sampling rate and built-in algorithms for filtering data outliers make it an ideal tool that can be used directly above the sea surface without the need for complex stilling-well structures.
- Harbor Safety: Assessing wave height and periods in harbors is critical for ensuring safe docking The LX-80 provides the necessary data to manage harbor operations effectively.
- Offshore Wind Platforms: Monitoring sea waves around offshore wind platforms is essential for both structural integrity and operational efficiency. The LX-80 offers reliable wave measurement capabilities to support these installations.
- Maritime Traffic Impact Assessment: A notable case study conducted by TU Delft and Rijkswaterstaat demonstrated the LX-80’s effectiveness in assessing waves generated by maritime traffic. The data collected
was used to determine the potential damage to vessels entering Dutch canal locks, showcasing the sensor’s practical impact.
Technological Advantages
The Geolux LX-80 is equipped with several technical features that set it apart from other sensors on the market:
- Detection Range: Available in versions with a maximum detection range from 15 meters to 50
- Internal Wave Parameter Analysis: More than 50 various wave parameters are calculated on There is no need to transfer full waveform data for offline postprocessing, which enables this instrument to be installed on locations where highspeed data transfer does not exist or is not convenient.
- Narrow Beam Angle: Utilizing innovative Geolux technology, the radar beam angle is extremely narrow at just 5 degrees, enhancing measurement accuracy, specifically when the radar is installed high above the sea
- High Sampling Rate: With a water level sampling rate of 10 Hz, the LX- 80 provides high-frequency measurements for detailed waveform analysis. This rate exceeds the Nyquist frequency for monitored sea waves, allowing for the filtering of outlier data points caused by water splashing.
- Output Protocols: The sensor supports RS-232, Modbus, and SDI-12 output protocols.
- Low Power Consumption: Its small size and low power requirements make the LX-80 an efficient choice for remote
The LX-80’s capabilities have been validated through numerous applications and studies. For instance, research conducted by TU Delft
highlighted its role in maritime traffic impact assessments. Another example comes from the US Geological Survey (USGS), which has utilized the LX-80 to analyze the impact of sea waves generated by hurricanes on coastal structures.
To find out more about Geolux, visit: www.geolux-radars.com
This feature appeared in Environment, Coastal & Offshore (ECO) Magazine’s 2024 Autumn edition Sampling & Survey, to read more access the magazine here.
