Long-Range Ocean Radar and
NICT Ocean Monitoring Platform in Sakishima (COMPASS)

The observation area of a surface current vector using Long-Range Ocean Radar (LROR) is shown in the figure. In general, multiple ocean radar observation is required to measure current vectors, so the LROR system consists of two radars: one at Ishigaki Island and one at Yonaguni Island. Each radar can measure the radial current component along the radar beam direction within a fan-shaped area. Current vector can be calculated in the overlapping area of the two fan-shaped areas. To verify the performance of the LROR, an offshore observation buoy named COMPASS (NICT Ocean Monitoring Platform in Sakishima) is moored at the indicated point in the figure.

Yonaguni Ocean Radar Facility	Ishigaki Ocean Radar Facility