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CODAR Archived DATA Image Information
# Archived CODAR Data Image Information

## Available Data Sets

### Raw Surface Currents

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These images are the unprocessed data measured by CODAR.

### Tidal Surface Currents

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These images represent the currents calculated using a least squares fit of the following regional tidal constituents to the raw data.

- M
_{2} - Half a Lunar Day (Period = 12.42 Hours)
- S
_{2} - Half a Solar Day (Period = 12.00 Hours)
- N
_{2} - Larger Lunar Elliptic (Period = 12.66 Hours)
- K
_{1} - Luni-Solar (Period = 23.93 Hours)
- O
_{1} - A Lunar Day (Period = 25.82 Hours)

### Detided Surface Currents

#### These images represent the currents that result from subtracting the tidal surface currents from the raw surface currents.

### Low-pass Filtered Surface Currents

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These images represent the currents calculated by applying a lowpass filter with a cutoff frequency of thirty hours to the detided velocity field. Therefore the currents contained in this field oscillate with a period greater than thirty hours.

### High-pass Surface Currents

#### These images represent the currents that result from subtracting the low-pass filtered surface currents from the detided surface currents.

### Surface Divergence

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These images illustrate the divergence of the low-pass filtered data represented by the equivalent vertical velocity assuming a one meter thick surface layer. (Upward velocity indicates divergence and downward velocity indicates convergence.)

### Surface Vorticity

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These images illustrtate the vorticity of the low-pass filtered data normalized by the local Coriolis parameter (f).