calc_transforms
- jwst.lib.set_telescope_pointing.calc_transforms(t_pars: TransformParameters)[source]
Calculate transforms which determine reference point celestial WCS.
This implements Eq. 3 from Technical Report JWST-STScI-003222, SM-12. Rev. C, 2021-11 From Section 3:
The Direction Cosine Matrix (DCM) that provides the transformation of a unit pointing vector defined in inertial frame (ECI J2000) coordinates to a unit vector defined in the science aperture Ideal frame coordinates is defined as [follows.]
- Parameters:
- t_parsTransformParameters
The transformation parameters. Parameters are updated during processing.
- Returns:
- transforms
Transforms The list of coordinate matrix transformations.
- transforms