calc_rotation_matrix
- jwst.assign_wcs.util.calc_rotation_matrix(roll_ref: float, v3i_yang: float, vparity: int = 1) list[float][source]
Calculate the rotation matrix.
- Parameters:
- roll_reffloat
Telescope roll angle of V3 North over East at the ref. point in radians
- v3i_yangfloat
The angle between ideal Y-axis and V3 in radians.
- vparityint
The x-axis parity, usually taken from the JWST SIAF parameter VIdlParity. Value should be “1” or “-1”.
- Returns:
- matrixlist
The rotation matrix,
[pc1_1, pc1_2, pc2_1, pc2_2]
Notes
The rotation is:
---------------- | pc1_1 pc2_1 | | pc1_2 pc2_2 | ----------------