CODAR HF radars, which are also called “SeaSondes”, detect and monitor synoptic surface currents and certain wave parameters. They are located entirely onshore.

SeaSondes meet various needs. The long-range model transmits the furthest offshore, between 150 and 200 km. The nearshore model provides the highest spatial resolution – as fine as a few hundred meters. Additional technical specifications are available here.

Unlike a current meter deployed in the water column, CODAR SeaSondes provide a synoptic view, which displays continuously and automatically as a map of surface currents. They are used for search and rescue operations, oil spill response, coastal navigation, nearshore engineering projects and environmental modeling. Examples are SHOWN HERE

Under certain environmental conditions, coastal HF radars also detect and monitor surface-wave parameters, such as significant wave height. Although limited to views of the open ocean, such as coastal areas common to the Caribbean, this secondary application is proving to be of interest to meteorological forecasting agencies and port authorities.

Homeland security agencies are also applying the technology to ship detection, however, this application is not provided on a commercial basis.

All CODARs are designed for remote deployment. A SeaSonde transmits at just 40 watts average, with total onsite electronics requiring between 350 and 500 watts. Thus, they run off standard 120 VAC or 220 VAC lines, or can be set-up to utilize remotely-deployed power sources, such as solar or wind-driven power.

As each CODAR SeaSonde is connected to the internet, data are transferred back to the user automatically. This connection also facilitates remote monitoring, operation and maintenance. If desired, you can even monitor a CODAR from an iPhone. CODARs are also unique in that they use a patented GPS timing technique that permits an entire network of SeaSondes to operate simultaneously at the same transmission frequency.

A theoretical explanation of HF radar for coastal monitoring can be found here.