quarterwave_model#
- astropop.polarimetry.quarterwave_model(psi, q, u, v, zero=0)#
Compute polarimetry z(psi) model for quarter wavelength retarder.
Z(psi) = Q*cos(2psi)**2 + U*sin(2psi)*cos(2psi) - V*sin(2psi)
- Parameters:
- psi: array_like
Array of retarder positions in degrees.
- q, u, v: float
Stokes parameters
- zero: float
Zero position of the retarder in degrees.