ADD_DISTORT | Add SIP distortion parameters into a FITS header |
AD2XY | Use astrometry structure to convert celestial to pixel coordinates |
ADXY | Use FITS header to convert celestial (RA,Dec) to pixel coordinates |
CONS_DEC | Obtain the X and Y coordinates of a line of constant declination |
CONS_RA | Obtain the X and Y coordinates of a line of constant right ascension |
EXTAST | EXTract ASTrometry parameters from a FITS header into an IDL structure |
FITS_CD_FIX | Update obsolete representations of the CD matrix in a FITS header |
GET_EQUINOX | Return a numeric equinox value from a FITS header |
GETROT | GET ROTation and plate scale from a FITS header |
GSSS_STDAST | Insert the closest tangent projection astrometry into an STScI Guidestar Survey Image |
GSSSADXY | Convert RA, Dec to pixel coordinates for an STScI survey image |
GSSSEXTAST | Extract astrometry parameters from an STScI Survey Image |
GSSSXYAD | Convert pixel coordinates to RA, Dec for an STScI survey image |
HASTROM | Rotate, Congrid, and/or shift an image until astrometry matches that in a reference FITS header. Used to align images. |
HBOXAVE | Boxaverage an image and update astrometry in a FITS header |
HCONGRID | CONGRID an image and update astrometry in a FITS header |
HEULER | Convert between Galactic, celestial and ecliptic coordinates in FITS a header |
HEXTRACT | Extract a subimage and update astrometry in a FITS header |
HPRECESS | Precess the astrometry in a FITS header to a new equinox. |
HREBIN | REBIN an image and update the astrometry in a FITS header |
HREVERSE | Reverse an image about either dimension and update astrometry in a FITS header |
HROT | Rotate an image and update astrometry in a FITS header. |
HROTATE | Apply IDL ROTATE function and update astrometry in a FITS header |
MAKE_ASTR | Build an astrometry structure from input parameter values |
PRECESS_CD | Precess coordinate description (CD) matrix in a FITS header to a new equinox. Called by HPRECESS |
PUTAST | Put astrometry parameters (e.g. rotation, plate scale) into a FITS header. |
SIP_EVAL | Compute distorted coordinates given SIP (simple imaging polynomial) coefficients |
SOLVE_ASTRO | Solve for an tangent-plane astrometric plate solution with optional distortion terms. |
STARAST | Obtain an exact astrometry solution given the coordinates and plate position of 2 or 3 stars. |
TNX_EVAL | Compute distorted coordinates give TNX (IRAF) projection |
TPV_EVAL | Compute distorted coordinates given TPV (Tangent + PV_ polynomial) coefficients |
UPDATE_DISTORT | Update SIP astrometry coefficients for a linear transformation |
WCS_CHECK_CTYPE | Check that pair of CTYPE parameters conform to WCS format. |
WCS_GETPOLE | Compute the coordinates of the native pole for non-polar projection |
WCSSPH2XY | Convert between longitude,latitude to X,Y angular coordinates for 25 different map projection types |
WCSXY2SPH | Inverse of WCSSPH2XY |
WCS_ROTATE | Rotate between standard (e.g. celestial) and native coordinates |
XYAD | Use FITS header to convert pixel (X,Y) to celestial(RA, Dec) coordinates |
XY2AD | Use astrometry structure to convert pixel to celestial coordinates |
XYXY | Convert X,Y values on one image to X,Y values in another image using astrometry in the FITS headers |