Ageotec

The free space version of the WaveGuide consists of a WaveGuide Radar with F08 antenna and a WaveGuide Server. Mounted high above the water and without any moving parts there is no need for cleaning or any preventive maintenance. (Re)calibration is never needed due to the long term stable zero reference and a constant sensitivity.
Because of the RS485 connection the WaveGuide Server can be placed everywhere within a distance of a few hundred meters.

• The 8' free space antenna gives the system a measuring range from 1 to 75 meters.
• Each measurement consists of one up/down sweep. From this up/down sweep measurement the distance is calculated. So each measurement is on its own. There is no filtering to smooth the data and to compensate for the Doppler shift.
• Sample rate 2.56Hz or 2Hz.
• accuracy water level 1 cm.
• Wave information is of equal quality as from Datawell's directional waverider
• Explosion proof. ATEX an FM certified.
• On line presentation of data in webbrowser with 1 minute refresh rate.
• On line distribution of data.

The WaveGuide On Board version measures from the bow of a sailing ship the height of the waves. A WaveGuide Radar and a motion sensor (Mti by Xsens) are combined in a stainless steel housing. This sensor unit is connected with the WaveGuide Server via one cable. The system time is synchronized to the GPS time. All data from the radar and the motion sensor are time stamped very accurate (std. 1 ms). The WaveGuide Radar measures the distance between the antenna and the water surface. The Mti sensor measures the displacements in vertical directions. The WaveGuide Server performs all the analysis.

• wave periods 1-100s
• wave heights  0 to 75 meter
• individual measurements accuracy 1 a 2 cm
• wave processing by SWAP
• GPS time synchronization
• GPS position
• power 24V, 10 Watt
• stainless steel housing, 15kg

With an array of three radars  the elevations of the sea surface at three positions are measured. Knowing the slopes and the phase relations,  the directional spectrum can be calculated.

Data processing

The radars are controlled by a WaveGuide server. Time synchronisation to 1 à 2 ms is essential. Beside this important task the WaveGuide Server takes care for all its other tasks like data processing, data distribution, data presentation, data logging and remote service.

Specifications

Waterlevel: +/- 1cm.
Wave height: +/- 5% ( Hm0, same as directional waverider)
Main Direction : +/- 5 degrees (in 30-500 mHz band)
Spreading : +/- 10 degrees (in 30-500 mHz band)

The WERA system (WavE RAdar) is a shore based remote sensing system using the over the horizon radar technology to monitor ocean surface currents, waves and wind direction. This long range, high resolution monitoring system operates with radio frequencies between 5 and 50 MHz. Easily configured for long ranges (more than 200 km @ 5 MHz) or short range applications with highest spatial resolution (250 m)