About speed data

A speed variable is a time series of the water current speed, and is derived from speed data added to a fileset. The variable can be used with a fixed platform.

What is affected by speed data?

Calculation of distance from speed data

Equation for distance based on speed data

Where:

dLatest is the latest distance (m)

u is speedLatest the latest speed (ms-1)

t = timeLatest - timePrevious is the difference between the latest and previous times (seconds)

a = (speedLatest - speedPrevious)/(timeLatest - timePrevious) is the acceleration between the latest and previous speeds (ms-2)

dPrevious is the previous (cumulative) distance (m)

Notes:

See also

Exporting speed data
Speed graph
Speed data file format
Platform Properties dialog box
2D school detection
Fish tracking