Background information

• Background information module celestial
  • Rotation matrices
  • FK4
  • FK4 and the elliptic terms of aberration
  • Transformations between the reference systems FK4 and FK5
  • Radio maps
  • Galactic Coordinates
  • Supergalactic coordinates
  • Ecliptic coordinates
  • ICRS, Dynamical J2000 and FK5
  • Composing other transformations
  • Defaults in relation to FITS
  • Glossary
  • References
• Background information spectral translations
  • Introduction
  • Alternate headers for a spectral line example
  • Alternative conversions
  • Legacy headers
  • WCSLIB in a GIPSY task