Remotely sensed surface currents in Monterey Bay from multiple HF radar installations

Ocean surface current detection using HF radar observations is reviewed, including the differences between direction finding and phased-array antenna implementations. Particular attention is given to several-month-long time series observations collected in Monterey Bay, California in 1992 using two direction finding (CODAR) systems. The measurements confirm the viability of the technique based on patterns of mean flow, diurnal sea-breeze-driven flow, and tidal flow. They also point out, however, areas of ongoing engineering concern. An expanded HF radar array that will include areas simultaneously covered by 3 or 4 radars is described and plans to use this array to address issues of error levels and data quality are outlined