Hello everyone! I struggle to solve one problem. I have discreet set of data of 2 functions C_L(alpha) and C_D(alpha) - lift coefficient and drag coefficient depending on angle of attack alpha. The set looks as follows:

ALPHA_CL = [-180.0, -160.0, -90.0, -20.0, -10.0, -5.0, 0.0, 20.0, 40.0, 90.0, 160.0, 180.0]

CL_LIST = [ 0.0, 0.5, 0.0, 0.08, 0.125, 0.15, 0.2, 1.0, 1.0, 0.0, -0.5, 0.0]

ALPHA_CD = [-180.0, -170.0, -140.0, -90.0, -20.0, 0.0, 20.0, 90.0, 140.0, 170.0, 180.0]

CD_LIST = [ 0.5, 0.5, 0.5, 1.0, 0.2, 0.1, 0.2, 1.0, 0.5, 0.5, 0.5]

I need those coefficients to calculate lift and drag force acting on kite.

F_L= 0.5 * rho * pow(v,2) * C_L(alpha)

How can I interpolate these sets of data so that when I calculate alpha angle - I can precisely determine C_L and D_L coefficients.

thank You for help