Technical reports

• TSR 2012-01: Distortion Correction in HST FITS Files
  • Introduction
  • Problems Introduced by the HST/ACS Distortion
  • SIP Convention
  • FITS Distortion Proposal
  • Non-polynomial Residual Correction
  • Detector To Image Correction
  • Merging Of The Conventions
  • Updating the FITS File
  • Summary
  • Appendix 1 - Sample ACS/WFC Image
  • Appendix 2 - NPOLFILE Example
  • Appendix 3 - D2IMFILE Example
• TSR 2012-03: NPOL Reference File
  • NPOL Reference File
  • Appendix
• TSR 2012-02: Definition of a Headerlet and Its Role in Updating WCS Information
  • Introduction
  • Source Image
  • Headerlet Definition
  • Working With Headerlets
  • Appendix 1: Headerlet API