...
When data with velocities are available as a timeseries with the u-component and the v-component, these can be placed in the uTimeSeriesSet and vTimeSeriesSet elements. In the grid display automatically arrows will be drawn showing the direction, calculated on the v and u component. The velocity is presented in a color, defined in the classBreaks.
Double clicking in the grid display will open the u and v timeseries in the timeseries display. Adding the uvAmplitude element (since 2015.02), where an amplitude parameter can be configured, the timeseries display will combine the u and v timeseries into one amplitude timeseries (sqrt(u^2+v^2)).
DirectionTimeSeriesSet
If a timeserie with direction data is available, this is where the TimeSeriesSet should be placed. Note: a TimeSeriesSet with velocity values is required in the ValueTimeSeriesSet!
...