Sequence Generator Pro will automatically record a variety of information in the FITS header (for sequence images).  The text below is a comprehensive list of data that is conditionally stored in the FITS header.  To view the FITS header for an image, see this section.


This data is always included in the FITS header:

  • SIMPLE:  True (Conforms to FITS standards)
  • BITPIX:  16 (16-bit image)
  • NAXIS:  2 (Number of data exes)
  • NAXIS1:  Length of the X axis
  • NAXIS2:  Length of the Y axis
  • BZERO:  32768 (Offset and data range of unsigned short)
  • BSCALE:  1 (Default scaling factor)
  • OBJECT: The name of the object (target)
  • DATE-LOC:  Local observation date (time image was written to disk)
  • DATE-OBS:  UTC observation date
  • IMAGETYP:  Type of frame (LIGHT, DARK, FLAT, BIAS)
  • CREATOR:  Capture software (Sequence Generator Pro / Lite)
  • INSTRUME:  Camera name
  • EXPOSURE:  Exposure time in seconds
  • XBINNING:  Camera X bin (always 1 for Canon cameras)
  • CCDXBIN:  Camera X bin (always 1 for Canon cameras)
  • YBINNING:  Camera Y bin (always 1 for Canon cameras)
  • CCDYBIN:  Camera Y bin (always 1 for Canon cameras)


This data is included if you have a Canon camera connected:


  • ISO:  The ISO level for this image



This data is included if you have a temperature controlled camera attached:


  • TEMPERAT:  Camera cooler temperature (recorded just prior to image download in case your camera turns off the cooler during this time)



This data is included if you have a filter wheel attached (and the sequence is using it):


  • FWHEEL:  Name of the connected filter wheel
  • FILTER:  Name of the current filter (the filter used to expose this image)



This data is included if you have a focuser attached (and the sequence is using it):


  • FOCUSER:  Name of the connected focuser
  • FOCPOS:  Absolute focuser position
  • TEMPCOMP:  Focuser temperature compensation (steps / deg) (only if you were using this option)
  • FOCTEMP:  Focuser temperature (not all focusers report temperature)



This data is included if you have a telescope attached (and the sequence is using it):


  • TELESCOP:  The name of the connected telescope
  • RA:  Object Right Ascension (as reported by the telescope at time of capture)
  • DEC:  Object Declination (as reported by the telescope at time of capture)
  • CRVAL1:  Object Right Ascension (as reported by the telescope at time of capture)
  • CRVAL2:  Object Declination (as reported by the telescope at time of capture)
  • OBJCTRA: Object right ascension in HMS
  • OBJCTDEC: Object declination in degrees
  • FOCALLEN:  The focal length of the current telescope
  • OBJCTALT:  The altitude of the object in degrees
  • AIRMASS:  The average airmass during the observation



This data is included if you have performed a solve and sync prior to capturing the image:


  • ANGLE:  The angle of the image (east of north)
  • SCALE:  The image's scale (arcsec / pixel)
  • PIXSCALE:  The image's scale (arcsec / pixel)



This data in included if you have assigned a user profile to your sequence:


  • OBSERVER:  Observer name
  • SITENAME:  Observatory / site name
  • SITEELEV:  Observatory / site elevation in meters
  • SITELAT:  Latitude of imaging site in degrees
  • SITELONG:  Longitude of the imaging site in degrees