pydda.cost_functions.calculate_smoothness_gradient

pydda.cost_functions.calculate_smoothness_gradient(u, v, w, dx, dy, dz, Cx=1e-05, Cy=1e-05, Cz=1e-05, upper_bc=True)

Calculates the gradient of the smoothness cost function by taking the Laplacian of the Laplacian of the wind field. All arrays in the given lists must have the same dimensions and represent the same spatial coordinates. :Parameters: * u (Float array) – Float array with u component of wind field

• v (Float array) – Float array with v component of wind field

• w (Float array) – Float array with w component of wind field

• Cx (float) – Constant controlling smoothness in x-direction

• Cy (float) – Constant controlling smoothness in y-direction

• Cz (float) – Constant controlling smoothness in z-direction

Returns:

y (float array) – value of gradient of smoothness cost function