STWCS documentation

This package provides support for WCS based distortion models and coordinate transformation developed to support HST imaging observations. It consists of two subpackages - updatewcs and wcsutil. updatewcs performs corrections to the basic WCS and inserts other distortion infomation in the science files as header keywords or file extensions. wcsutil provides an wcsutil.STWCS object which extends astropy’s astropy.wcs.WCS provides HST instrument specific information as well as methods for coordinate transformation. wcsutil also provides functions for manipulating alternate WCS descriptions in the headers. STWCS is based on astropy.wcs.


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