Help request using Wind field simulation (the fast version)

Hello everyone.

I am currently working in an aircraft trajectory optimization problem in the presence of wind uncertainty.

I would like to create a series of 2D correlated wind field over an area at a fixed time, being this wind field in the northward and eastward directions mimicking elements of an ensemble weather forecast.

I have found this set of functions which seem to do all I want and more. However, I don't understand very well what I am doing.

Has someone tried to use this functions before and can tell me how to do what I need? (an output with a pair of XY coordinates and a windspeed in the X direction and another in the Y direction)

I know this has to do with the function windSimFast, but I don't have very clear how to do it.

Best regards.

Jaime.