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.

Contents:

• wcsutil
  • HSTWCS API
  • HSTWCS Examples
  • User Interface: altwcs
• updatewcs
  • UPDATEWCS - User Interface
  • WCS Corrections
  • UPDATEWCS.UTILS functions
  • Astrometry Database Interface
• Headerlet
  • Headerlet File Structure
  • User-Interface: headerlet
• Technical reports
  • TSR 2012-01: Distortion Correction in HST FITS Files
  • TSR 2012-03: NPOL Reference File
  • TSR 2012-02: Definition of a Headerlet and Its Role in Updating WCS Information

Indices and tables

• Index

• Module Index

• Search Page