CODAR Real time vector fields: standard

Tidal Vector Field: This vector field represents the component of the raw velocity that is caused by tidal forcing. Detided Vector Field: The detided vector field contains all the surface currents shown in the raw velocity field with the exception of the tidal currents. Using the above periods, a predicted tide is calculated and then subtracted from the raw data field.

Low-pass Vector Field: The low-pass surface current field is representative of the second step of data processing. A low-pass filter is applied to the detided data to further eliminate any other currents with a period less than 30 hours. The data is delayed three hours because the filter needs information up to three hours after the time of calculation.

High-pass Vector Field: These high frequency currents are calculated by subtracting the low-pass field from the detided field. Therefore, These currents have periods less than thirty hours and do not include the tides.