createInitialSkyWcs

lsst.obs.base.createInitialSkyWcs(visitInfo, detector, flipX=None)

Create a SkyWcs from the visit information and detector geometry.

A typical use case for this is to create the initial WCS for a newly-read raw exposure.

Parameters:

visitInfolsst.afw.image.VisitInfo

Where to get the telescope boresight and rotator angle from.

detectorlsst.afw.cameraGeom.Detector

Where to get the camera geometry from.

flipXbool or None, optional

If False, +X is along W, if True +X is along E. If None, the focal plane parity in the camera geometry is assumed to be correct, which may not be true for old camera datasets.

Returns:

skyWcslsst.afw.geom.SkyWcs

The new composed WCS.

Raises:

InitialSkyWcsError

Raised if there is an error generating the SkyWcs, chained from the lower-level exception if available.