Skip to content

GitLab

  • Menu
Projects Groups Snippets
    • Loading...
  • Help
    • Help
    • Support
    • Community forum
    • Submit feedback
    • Contribute to GitLab
  • Sign in
  • kis_tools kis_tools
  • Project information
    • Project information
    • Activity
    • Labels
    • Members
  • Repository
    • Repository
    • Files
    • Commits
    • Branches
    • Tags
    • Contributors
    • Graph
    • Compare
  • Issues 33
    • Issues 33
    • List
    • Boards
    • Service Desk
    • Milestones
  • Merge requests 0
    • Merge requests 0
  • Deployments
    • Deployments
    • Environments
    • Releases
  • Monitor
    • Monitor
    • Incidents
  • Analytics
    • Analytics
    • Value stream
    • Repository
  • Wiki
    • Wiki
  • Snippets
    • Snippets
  • Activity
  • Graph
  • Create a new issue
  • Commits
  • Issue Boards
Collapse sidebar
  • sdc
  • kis_toolskis_tools
  • Issues
  • #257

Closed
Open
Created Nov 26, 2020 by Vigeesh Gangadharan@vigeeshMaintainer

CTYPE inconsistency in header for data in spectroscopic mode

For dataset in spectroscopic mode, the first axis seems to be always wavelength.
But this is not consistent with the CTYPE-i keywords later.

e.g.

SIMPLE  =                    T / conforms to FITS standard                      
BITPIX  =                   32 / array data type                                
NAXIS   =                    3 / number of array dimensions                     
NAXIS1  =                 1010 / Length of data axis 1                          
NAXIS2  =                  484 / Length of data axis 2                          
NAXIS3  =                    1 / Length of data axis 3        

FILENAME= 'gris_20160613_120408_l1s_008_120_0029.fits' / Name of file           
EXTNAME = '20160613_008_120_0029' / Unique HDU name                             
POINT_ID= '20160613_008'       / Unique (re-)pointing ID                        
OBS_TRGT= 'Sunspot(s)'         / Observation Target                             

WCSNAME = 'Helioprojective Cartesian' / nan                                     
CTYPE1  = 'HGLN-TAN'           / Type of coordinates along axis 1               
CUNIT1  = 'arcsec  '           / Units along axis 1                             
CRPIX1  =                    0 / Reference pixel                                
CRVAL1  =              297.671 / Value at reference pixel on axis 1             
CDELT1  =             0.080792 / Sampling along axis 1                          
CSYER1  =                 1900 / Systematic Error along axis 1                  
CTYPE2  = 'HGLT-TAN'           / Type of coordinates along axis 2               
CUNIT2  = 'arcsec  '           / Units along axis 2                             
CRPIX2  =                    0 / Reference pixel                                
CRVAL2  =              408.258 / Value at reference pixel on axis 2             
CDELT2  =             0.080792 / Sampling along axis 2                          
CSYER2  =                 1900 / Systematic Error along axis 2                  
CTYPE3  = 'WAVE    '           / Type of coordinates along axis 3               
CUNIT3  = 'Angstrom'           / Units along axis 3                             
CRPIX3  =                    0 / Reference pixel                                
CRVAL3  =            10823.076 / Value at reference pixel on axis 3             
CDELT3  =             0.017998 / Sampling along axis 3                          
CSYER3  =             0.017998 / Systematic Error along axis 3                  
Edited Nov 30, 2020 by Carl Schaffer
Assignee
Assign to
Time tracking