zernikeFit¶
- lsst.ts.wep.utils.zernikeFit(u: ndarray, v: ndarray, z: ndarray, jmin: int = 4, jmax: int = 22, obscuration: float = 0.612, mask: Optional[ndarray] = None) ndarray¶
Fit Zernike polynomials to the surface.
- Parameters:
- unp.ndarray
The x normalized pupil coordinate(s).
- vnp.ndarray
The y normalized pupil coordinate(s). Must be same shape as u.
- znp.ndarray
The wavefront surface evaluated at the u, v points.
- jminint, optional
The minimum Noll index, inclusive. Must be >= 0. (the default is 4)
- jmaxint
The maximum Noll index to fit, inclusive. Must be >= jmin. (the default is 22)
- obscurationfloat, optional
The fractional obscuration. (the default is 0.612, corresponding to the Simonyi Survey Telescope.)
- masknp.ndarray, optional
A mask for the surface. The Zernikes are only fit to the unmasked points. (the default is None)
- Returns:
- np.ndarray
The best fit Zernike coefficients in the same units as z.
- Raises:
- ValueError
If jmin is negative or jmax is less than jmin