computeAzAltFromBasePupil¶
- lsst.cbp.coordUtils.computeAzAltFromBasePupil(vectorBase, vectorPupil)¶
Compute az/alt from a vector in the base frame and the same vector in the pupil frame.
- Parameters:
- vectorBase
iterable
of threefloat
3-dimensional vector in the base frame.
- vectorPupil
iterable
offloat
The same vector in the pupil frame. This vector should be within 45 degrees or so of the optical axis for accurate results.
- vectorBase
- Returns:
- pupilAzAlt
lsst.geom.SpherePoint
Pointing of the pupil frame as internal azimuth, altitude.
- pupilAzAlt
- Raises:
- ValueError
If vectorPupil x <= 0
Notes
The magnitude of each vector is ignored, except that a reasonable magnitude is required in order to compute an accurate unit vector.