.. _VisMasterDarkFrame:

=============================
Vis Master Dark Frame Product
=============================

Metadata
______________________

+------------------------------------------------+----------------------------------------------------------------------------------------------+
| Data product name                              | DpdVisMasterDarkFrame                                                                        |
+------------------------------------------------+----------------------------------------------------------------------------------------------+
| Data product custodian                         | VIS                                                                                          |
+------------------------------------------------+----------------------------------------------------------------------------------------------+
| Name of the Schema file                        | .. raw:: html                                                                                |
|                                                |                                                                                              |
|                                                | `euc-vis-MasterDarkFrame.xsd <https://gitlab.euclid-sgs.uk/ST-DM/ST_DataModel/-/blob/10.1.2/ |
|                                                | ST_DM_Schema/auxdir/ST_DM_Schema/dpd/vis/euc-vis-MasterDarkFrame.xsd>`_                      |
+------------------------------------------------+----------------------------------------------------------------------------------------------+
| Processing Element(s) creating/using the data  | Final data product of the Master Dark Calibration pipeline.                                  |
| product                                        | The VIS Science pipeline and other calibration pipelines may decide to correct for dark      |
|                                                | current and straylight in future.                                                            |
+------------------------------------------------+----------------------------------------------------------------------------------------------+
| Processing function using the data product     | VIS                                                                                          |
+------------------------------------------------+----------------------------------------------------------------------------------------------+

Proposed for inclusion in EAS/SAS
==========================================
.. PFUsingStart

Yes

.. PFUsingEnd

Data product elements
=====================
+--------------+----------------------------------------------+
| Header       | object of type sys:genericHeader             |
+--------------+----------------------------------------------+
| Data         | object of type vis:visMasterDarkFrame        |
+--------------+----------------------------------------------+
| QualityFlags | object of type dqc:sqfPlaceHolder            |
+--------------+----------------------------------------------+
| Parameters   | object of type ppr:genericKeyValueParameters |
+--------------+----------------------------------------------+
   
Detailed description of the data product
========================================
.. DetailedDescStart

The Master Dark Calibration Pipeline result, containing the dark current and the straylight per pixel, calculated from a set of dark calibration exposures.
Dark are taken shutter closed with an integration time of 325s.

**Name of file:**

``EUC_VIS_MSR-DRK_[ExposureTime]__[YYYYMMDDThhmmss.s]Z.fits``

where the date is the production date.

The straylight changes according to the orientation of the spacecraft (alpha angle and solar aspect angle). For now, the selection of dark for the production of this product does not take this angle into account.

The output results is a FITS file with 144 extension, one per quadrant.

For now (PF-17), exposure are not dark substracted and so not corrected of the straylight.

The master dark pipeline is also used to produce cosmetic flagmaps (hot pixel).
The Flagmap data format is defined in the `data model here <http://euclid.esac.esa.int/svn/EC/SGS/ST/4-2-05-DM/schema/trunk/dictionary/bas/msk/>`_ and is described in :ref:`VisFlagMap`.

Data Header
-----------

+----------+--------------------------------------------------------------------+                                    
|         Primary Header                                                        |
+==========+====================================================================+
| SIMPLE   |  file does conform to FITS standard                                |
+----------+--------------------------------------------------------------------+                                          
| BITPIX   |  number of bits per data pixel                                     |
+----------+--------------------------------------------------------------------+                                     
| NAXIS    |  number of data axes                                               |
+----------+--------------------------------------------------------------------+                           
| EXTEND   |  FITS dataset may contain extensions                               |
+----------+--------------------------------------------------------------------+                                           
| FITS_DEF |  FITS definition name                                              |
+----------+--------------------------------------------------------------------+                            
| FITS_VER |  FITS definition version                                           |
+----------+--------------------------------------------------------------------+                               
| TIMESYS  |  TIMESYS                                                           |
+----------+--------------------------------------------------------------------+               
| PLAN_ID  |  32-bit SOC Operation ID                                           |
+----------+--------------------------------------------------------------------+                               
| BUNIT    |  Pixel data unit, e.g. 'electrons' or 'adu'                        |
+----------+--------------------------------------------------------------------+                                                  
| OBASW    |  On board application software version: version.                   |
+----------+--------------------------------------------------------------------+                                                       
| DATE     |  UT date when this file was created                                |
+----------+--------------------------------------------------------------------+                                          
| SOFTVERS |  version of the simulator or version of the LE1                    |
+----------+--------------------------------------------------------------------+                                                      
| EXPTIME  |  Commanded integration time in seconds, e.g. 565                   |
+----------+--------------------------------------------------------------------+                                                       
| IMG_CAT  |  Data product category: SCIENCE, CALIB, TECHNICA                   |
+----------+--------------------------------------------------------------------+                                                       
| IMG_T1   |  values in {BIAS, DARK, FLAT, LINEARITY, CHARGE_INJECTION          |
+----------+--------------------------------------------------------------------+                                                       
| IMG_T2   |  values in {LAMP, SKY, DOME, OTHER...} from SEQU                   |
+----------+--------------------------------------------------------------------+                                                       
| OBSMODE  |  ScienceWide, ScienceDeep, Calibration                             |
+----------+--------------------------------------------------------------------+                                             
| OBSTYPE  |                                                                    |
+----------+--------------------------------------------------------------------+       
| INSTRUME |  VIS, or VISsim for simulations                                    |
+----------+--------------------------------------------------------------------+                                      
| TELESCOP |  Telescope name: EUCLID                                            |
+----------+--------------------------------------------------------------------+                              
| OBT-OBS  |  VIS sequence start time (OBT)                                     |
+----------+--------------------------------------------------------------------+                                     
| OBT_STA1 |   Integer, number of seconds of OBT (START_TIME)                   |
+----------+--------------------------------------------------------------------+                                                       
| OBT_STA2 |   Integer, number of microseconds of OBT (START_T)                 |
+----------+--------------------------------------------------------------------+                                                         
| DATE-OBS |  Inst. seq. start time in UTC                                      |
+----------+--------------------------------------------------------------------+                                    
| MJD-OBS  |     Inst. seq. start time in MJD                                   |
+----------+--------------------------------------------------------------------+                                       
| FIELDID  |     Field Id                                                       |
+----------+--------------------------------------------------------------------+                   
| OBS_ID   |                 OSS_obsid                                          |
+----------+--------------------------------------------------------------------+                                
| DITHOBS  |  OSS_inObsId                                                       |
+----------+--------------------------------------------------------------------+                   
| PTGID    |  OSS_pointingID                                                    |
+----------+--------------------------------------------------------------------+                      
| EXPNUM   |  I don't understand the difference with DITHOBS                    |
+----------+--------------------------------------------------------------------+                                                      
| TOTEXP   |  Total number of Exposures in the specific Point                   |
+----------+--------------------------------------------------------------------+                                                       
| INSTRMOD |  VIS intrument mode: Science or Manual                             |
+----------+--------------------------------------------------------------------+                                             
| COMPALGO |        Science TM compression mode: NoCompression, Co              |
+----------+--------------------------------------------------------------------+                                                
| COMPPARA |       Science TM compression parameters: 8 or 16 bits              |
+----------+--------------------------------------------------------------------+                                                
| RA       |       OSS_attEqLon                                                 |
+----------+--------------------------------------------------------------------+             
| DEC      |       OSS_attEqLat                                                 |
+----------+--------------------------------------------------------------------+             
| PA       |       OSS_attEqPosAngle                                            |
+----------+--------------------------------------------------------------------+                  
| EQUINOX  |       Standard FK5 (years), e.g. 2000.                             |
+----------+--------------------------------------------------------------------+                                 
| SEQID    |       Sequence ID                                                  |
+----------+--------------------------------------------------------------------+            
| DATE-END |       9702Z' / Inst. seq. end time in UTC                          |
+----------+--------------------------------------------------------------------+                                    
| OBT_END1 |       Integer, number of seconds of OBT (VIS sequence              |
+----------+--------------------------------------------------------------------+                                                
| OBT_END2 |       Integer, number of microseconds of OBT (VIS seq              |
+----------+--------------------------------------------------------------------+                                                
| NOMCHAIN |       VDGT2771                                                     |
+----------+--------------------------------------------------------------------+         
| VSTART   |       Index of first readout line (starting at 0)                  |
+----------+--------------------------------------------------------------------+                                            
| VEND     |       Index of last readout line + 1                               |
+----------+--------------------------------------------------------------------+                               
| ROECFGID |       ROE configuration table ID                                   |
+----------+--------------------------------------------------------------------+                           
| RSUSINID |       Table version of RSU SINE table used in the RSU              |
+----------+--------------------------------------------------------------------+                                                
| RSUFRID  |       Table version of RSU FREQ table used in the RSU              |
+----------+--------------------------------------------------------------------+                                                
| RSUSFRID |       Table version of RSU short FREQ table used in t              |
+----------+--------------------------------------------------------------------+                                                
| RSUCFSTA |       Shutter unit configuration status: CLOSED_LOOP,              |
+----------+--------------------------------------------------------------------+                                                
| TP_STAT  |       Trap pumping status: off, parallel, serial, mul              |
+----------+--------------------------------------------------------------------+                                                
| CUSTATUS |       Calibration unit status: On or Off                           |
+----------+--------------------------------------------------------------------+                                   
| CI_STAT  |       Charge injection status: On or Off                           |
+----------+--------------------------------------------------------------------+                                   
| OBT_STA  |       OBT at start time                                            |
+----------+--------------------------------------------------------------------+                  
| DATE-ENH |       4932Z' / UTC of LE1 Enhancement                              |
+----------+--------------------------------------------------------------------+                                
| AUX_VERS |       LE1 Enh. (AUX) Processor name & version                      |
+----------+--------------------------------------------------------------------+                                        
| ELAT     |       OSS_attEclipLat                                              |
+----------+--------------------------------------------------------------------+                
| ELONG    |       OSS_attEclipLon                                              |
+----------+--------------------------------------------------------------------+                
| POS      |       OSS_attEclipPosAngle                                         |
+----------+--------------------------------------------------------------------+                     
| ALPHA    |       OSS_alpha                                                    |
+----------+--------------------------------------------------------------------+          
| BETA     |       OSS_beta                                                     |
+----------+--------------------------------------------------------------------+         
| SAA      |       OSS_saa                                                      |
+----------+--------------------------------------------------------------------+        
| PATCH_ID |       OSS_obsPatchId                                               |
+----------+--------------------------------------------------------------------+               
| FOV_LAT1 |       OSS_fovLat1                                                  |
+----------+--------------------------------------------------------------------+            
| FOV_LAT2 |       OSS_fovLat2                                                  |
+----------+--------------------------------------------------------------------+            
| FOV_LAT3 |       OSS_fovLat3                                                  |
+----------+--------------------------------------------------------------------+            
| FOV_LAT4 |       OSS_fovLat4                                                  |
+----------+--------------------------------------------------------------------+            
| FOV_LON1 |       OSS_fovLon1                                                  |
+----------+--------------------------------------------------------------------+            
| FOV_LON2 |       OSS_fovLon2                                                  |
+----------+--------------------------------------------------------------------+            
| FOV_LON3 |       OSS_fovLon3                                                  |
+----------+--------------------------------------------------------------------+            
| FOV_LON4 |       OSS_fovLon4                                                  |
+----------+--------------------------------------------------------------------+            
| VS1T2043 |  VS1T2043                                                          |
+----------+--------------------------------------------------------------------+           
| VS1T2050 |  VS1T2050                                                          |
+----------+--------------------------------------------------------------------+           
| VS1T2020 |  VS1T2020                                                          |
+----------+--------------------------------------------------------------------+           
| VS1T2021 |  VS1T2021                                                          |
+----------+--------------------------------------------------------------------+           
| VS1T2028 |  VS1T2028                                                          |
+----------+--------------------------------------------------------------------+           
| VS1T2029 |  VS1T2029                                                          |
+----------+--------------------------------------------------------------------+           
| VS1T2036 |  VS1T2036                                                          |
+----------+--------------------------------------------------------------------+           
| VS1T2037 |  VS1T2037                                                          |
+----------+--------------------------------------------------------------------+           
| VS2T2043 |  VS2T2043                                                          |
+----------+--------------------------------------------------------------------+           
| VS2T2050 |  VS2T2050                                                          |
+----------+--------------------------------------------------------------------+           
| VS2T2020 |  VS2T2020                                                          |
+----------+--------------------------------------------------------------------+           
| VS2T2021 |  VS2T2021                                                          |
+----------+--------------------------------------------------------------------+           
| VS2T2028 |  VS2T2028                                                          |
+----------+--------------------------------------------------------------------+           
| VS2T2029 |  VS2T2029                                                          |
+----------+--------------------------------------------------------------------+           
| VS2T2036 |  VS2T2036                                                          |
+----------+--------------------------------------------------------------------+           
| VS2T2037 |  VS2T2037                                                          |
+----------+--------------------------------------------------------------------+           
| VS3T2043 |  VS3T2043                                                          |
+----------+--------------------------------------------------------------------+           
| VS3T2050 |  VS3T2050                                                          |
+----------+--------------------------------------------------------------------+           
| VS3T2020 |  VS3T2020                                                          |
+----------+--------------------------------------------------------------------+           
| VS3T2021 |  VS3T2021                                                          |
+----------+--------------------------------------------------------------------+           
| VS3T2028 |  VS3T2028                                                          |
+----------+--------------------------------------------------------------------+           
| VS3T2029 |  VS3T2029                                                          |
+----------+--------------------------------------------------------------------+           
| VS3T2036 |  VS3T2036                                                          |
+----------+--------------------------------------------------------------------+           
| VS3T2037 |  VS3T2037                                                          |
+----------+--------------------------------------------------------------------+           
| VS4T2043 |  VS4T2043                                                          |
+----------+--------------------------------------------------------------------+           
| VS4T2050 |  VS4T2050                                                          |
+----------+--------------------------------------------------------------------+           
| VS4T2020 |  VS4T2020                                                          |
+----------+--------------------------------------------------------------------+           
| VS4T2021 |  VS4T2021                                                          |
+----------+--------------------------------------------------------------------+           
| VS4T2028 |  VS4T2028                                                          |
+----------+--------------------------------------------------------------------+           
| VS4T2029 |  VS4T2029                                                          |
+----------+--------------------------------------------------------------------+           
| VS4T2036 |  VS4T2036                                                          |
+----------+--------------------------------------------------------------------+           
| VS4T2037 |  VS4T2037                                                          |
+----------+--------------------------------------------------------------------+           
| VS5T2043 |  VS5T2043                                                          |
+----------+--------------------------------------------------------------------+           
| VS5T2050 |  VS5T2050                                                          |
+----------+--------------------------------------------------------------------+           
| VS5T2020 |  VS5T2020                                                          |
+----------+--------------------------------------------------------------------+           
| VS5T2021 |  VS5T2021                                                          |
+----------+--------------------------------------------------------------------+           
| VS5T2028 |  VS5T2028                                                          |
+----------+--------------------------------------------------------------------+           
| VS5T2029 |  VS5T2029                                                          |
+----------+--------------------------------------------------------------------+           
| VS5T2036 |  VS5T2036                                                          |
+----------+--------------------------------------------------------------------+           
| VS5T2037 |  VS5T2037                                                          |
+----------+--------------------------------------------------------------------+           
| VS6T2043 |  VS6T2043                                                          |
+----------+--------------------------------------------------------------------+           
| VS6T2050 |  VS6T2050                                                          |
+----------+--------------------------------------------------------------------+           
| VS6T2020 |  VS6T2020                                                          |
+----------+--------------------------------------------------------------------+           
| VS6T2021 |  VS6T2021                                                          |
+----------+--------------------------------------------------------------------+           
| VS6T2028 |  VS6T2028                                                          |
+----------+--------------------------------------------------------------------+           
| VS6T2029 |  VS6T2029                                                          |
+----------+--------------------------------------------------------------------+           
| VS6T2036 |  VS6T2036                                                          |
+----------+--------------------------------------------------------------------+           
| VS6T2037 |  VS6T2037                                                          |
+----------+--------------------------------------------------------------------+           
| VS7T2043 |  VS7T2043                                                          |
+----------+--------------------------------------------------------------------+           
| VS7T2050 |  VS7T2050                                                          |
+----------+--------------------------------------------------------------------+           
| VS7T2020 |  VS7T2020                                                          |
+----------+--------------------------------------------------------------------+           
| VS7T2021 |  VS7T2021                                                          |
+----------+--------------------------------------------------------------------+           
| VS7T2028 |  VS7T2028                                                          |
+----------+--------------------------------------------------------------------+           
| VS7T2029 |  VS7T2029                                                          |
+----------+--------------------------------------------------------------------+           
| VS7T2036 |  VS7T2036                                                          |
+----------+--------------------------------------------------------------------+           
| VS7T2037 |  VS7T2037                                                          |
+----------+--------------------------------------------------------------------+           
| VS8T2043 |  VS8T2043                                                          |
+----------+--------------------------------------------------------------------+           
| VS8T2050 |  VS8T2050                                                          |
+----------+--------------------------------------------------------------------+           
| VS8T2020 |  VS8T2020                                                          |
+----------+--------------------------------------------------------------------+           
| VS8T2021 |  VS8T2021                                                          |
+----------+--------------------------------------------------------------------+           
| VS8T2028 |  VS8T2028                                                          |
+----------+--------------------------------------------------------------------+           
| VS8T2029 |  VS8T2029                                                          |
+----------+--------------------------------------------------------------------+           
| VS8T2036 |  VS8T2036                                                          |
+----------+--------------------------------------------------------------------+           
| VS8T2037 |  VS8T2037                                                          |
+----------+--------------------------------------------------------------------+           
| VS9T2043 |  VS9T2043                                                          |
+----------+--------------------------------------------------------------------+           
| VS9T2050 |  VS9T2050                                                          |
+----------+--------------------------------------------------------------------+           
| VS9T2020 |  VS9T2020                                                          |
+----------+--------------------------------------------------------------------+           
| VS9T2021 |  VS9T2021                                                          |
+----------+--------------------------------------------------------------------+           
| VS9T2028 |  VS9T2028                                                          |
+----------+--------------------------------------------------------------------+           
| VS9T2029 |  VS9T2029                                                          |
+----------+--------------------------------------------------------------------+           
| VS9T2036 |  VS9T2036                                                          |
+----------+--------------------------------------------------------------------+           
| VS9T2037 |  VS9T2037                                                          |
+----------+--------------------------------------------------------------------+           
| VSAT2043 |  VSAT2043                                                          |
+----------+--------------------------------------------------------------------+           
| VSAT2050 |  VSAT2050                                                          |
+----------+--------------------------------------------------------------------+           
| VSAT2020 |  VSAT2020                                                          |
+----------+--------------------------------------------------------------------+           
| VSAT2021 |  VSAT2021                                                          |
+----------+--------------------------------------------------------------------+           
| VSAT2028 |  VSAT2028                                                          |
+----------+--------------------------------------------------------------------+           
| VSAT2029 |  VSAT2029                                                          |
+----------+--------------------------------------------------------------------+           
| VSAT2036 |  VSAT2036                                                          |
+----------+--------------------------------------------------------------------+           
| VSAT2037 |  VSAT2037                                                          |
+----------+--------------------------------------------------------------------+           
| VSBT2043 |  VSBT2043                                                          |
+----------+--------------------------------------------------------------------+           
| VSBT2050 |  VSBT2050                                                          |
+----------+--------------------------------------------------------------------+           
| VSBT2020 |  VSBT2020                                                          |
+----------+--------------------------------------------------------------------+           
| VSBT2021 |  VSBT2021                                                          |
+----------+--------------------------------------------------------------------+           
| VSBT2028 |  VSBT2028                                                          |
+----------+--------------------------------------------------------------------+           
| VSBT2029 |  VSBT2029                                                          |
+----------+--------------------------------------------------------------------+           
| VSBT2036 |  VSBT2036                                                          |
+----------+--------------------------------------------------------------------+           
| VSBT2037 |  VSBT2037                                                          |
+----------+--------------------------------------------------------------------+           
| VSCT2043 |  VSCT2043                                                          |
+----------+--------------------------------------------------------------------+           
| VSCT2050 |  VSCT2050                                                          |
+----------+--------------------------------------------------------------------+           
| VSCT2020 |  VSCT2020                                                          |
+----------+--------------------------------------------------------------------+           
| VSCT2021 |  VSCT2021                                                          |
+----------+--------------------------------------------------------------------+           
| VSCT2028 |  VSCT2028                                                          |
+----------+--------------------------------------------------------------------+           
| VSCT2029 |  VSCT2029                                                          |
+----------+--------------------------------------------------------------------+           
| VSCT2036 |  VSCT2036                                                          |
+----------+--------------------------------------------------------------------+           
| VSCT2037 |  VSCT2037                                                          |
+----------+--------------------------------------------------------------------+           
| POS_X    |  OEM_x                                                             |
+----------+--------------------------------------------------------------------+        
| POS_Y    |  OEM_y                                                             |
+----------+--------------------------------------------------------------------+        
| POS_Z    |  OEM_z                                                             |
+----------+--------------------------------------------------------------------+        
| VEL_X    |  OEM_vx                                                            |
+----------+--------------------------------------------------------------------+         
| VEL_Y    |  OEM_vy                                                            |
+----------+--------------------------------------------------------------------+         
| VEL_Z    |  OEM_vz                                                            |
+----------+--------------------------------------------------------------------+         
| CALBLKID |  OSS_obsType                                                       |
+----------+--------------------------------------------------------------------+              
| CALBLKVR |  OSS_variant                                                       |
+----------+--------------------------------------------------------------------+              
| N_CCD    |                                                                    |
+----------+--------------------------------------------------------------------+ 
| BIASSEC  | Offset area relative to readout, 1-based                           |
+----------+--------------------------------------------------------------------+                                          

+----------+--------------------------------------------------------------------+                                    
|         Extension Header for                                                  |
+==========+====================================================================+
| XTENSION | IMAGE extension                                                    |
+----------+--------------------------------------------------------------------+                         
| BITPIX   | number of bits per data pixel                                      |
+----------+--------------------------------------------------------------------+                                       
| NAXIS    | number of data axes                                                |
+----------+--------------------------------------------------------------------+                             
| NAXIS1   | length of data axis 1                                              |
+----------+--------------------------------------------------------------------+                               
| NAXIS2   | length of data axis 2                                              |
+----------+--------------------------------------------------------------------+                               
| PCOUNT   | required keyword; must = 0                                         |
+----------+--------------------------------------------------------------------+                                    
| GCOUNT   | required keyword; must = 1                                         |
+----------+--------------------------------------------------------------------+                                    
| EXTNAME  |                                                                    |
+----------+--------------------------------------------------------------------+          
| DETID    |  CCD-ID field from science TM (0-35)                               |
+----------+--------------------------------------------------------------------+                                              
| CCDID    |  e.g. Detector ID, e.g. '0-0', '1-1' ... '6-6'                     |
+----------+--------------------------------------------------------------------+                                                        
| QUADID   |  e.g. Quadrant ID, e.g. 'E', 'F', 'G' or 'H'                       |
+----------+--------------------------------------------------------------------+                                                      
| ROEID    |  ROE ID: 1-12                                                      |
+----------+--------------------------------------------------------------------+                       
| ROECTV   |  ROE configuration table version                                   |
+----------+--------------------------------------------------------------------+                                          
| BUNIT    |  Pixel data unit, e.g. 'electrons' or 'adu'                        |
+----------+--------------------------------------------------------------------+                                                     
| PRESCANX |  number of serial prescan pixels, e.g 51                           |
+----------+--------------------------------------------------------------------+                                                  
| OVRSCANX |  number of serial overscan pixels, e.g 29                          |
+----------+--------------------------------------------------------------------+                                                   
| OVRSCANY |  number of parallel overscan pixels, e.g 20                        |
+----------+--------------------------------------------------------------------+                                                     
| EXPDUR1  |  For nominal sequence: duration (s) between shut                   |
+----------+--------------------------------------------------------------------+                                                          
| EXPDUR2  |  For nominal sequence: duration (s) between shut                   |
+----------+--------------------------------------------------------------------+                                                          
| CRVAL1   |  Right ascension at ref pixel                                      |
+----------+--------------------------------------------------------------------+                                       
| CRVAL2   |  Declination at ref pixel                                          |
+----------+--------------------------------------------------------------------+                                   
| CRPIX1   |  Reference pixel x coordinate                                      |
+----------+--------------------------------------------------------------------+                                       
| CRPIX2   |  Reference pixel y coordinate                                      |
+----------+--------------------------------------------------------------------+                                       
| CD1_1    |  Translation matrix element                                        |
+----------+--------------------------------------------------------------------+                                     
| CD1_2    |  Translation matrix element                                        |
+----------+--------------------------------------------------------------------+                                     
| CD2_1    |  Translation matrix element                                        |
+----------+--------------------------------------------------------------------+                                     
| CD2_2    |  Translation matrix element                                        |
+----------+--------------------------------------------------------------------+                                     
| CTYPE1   |  Coordinate 1 type                                                 |
+----------+--------------------------------------------------------------------+                            
| CTYPE2   |  Coordinate 2 type                                                 |
+----------+--------------------------------------------------------------------+                            
| CUNIT1   |  Physical units of CRVAL1                                          |
+----------+--------------------------------------------------------------------+                                   
| CUNIT2   |  Physical units of CRVAL2                                          |
+----------+--------------------------------------------------------------------+                                   
| RADESYS  |  Coordinate reference frame, e.g. 'FK5'                            |
+----------+--------------------------------------------------------------------+                                                 
| WCSAXES  |  WCSAXES                                                           |
+----------+--------------------------------------------------------------------+                  
| CMPRTSCI |  Quadrant image compression ratio obtained on-bo                   |
+----------+--------------------------------------------------------------------+                                                          
| GAIN     |                                                                    |
+----------+--------------------------------------------------------------------+               
| RDNOISE  |                                                                    |
+----------+--------------------------------------------------------------------+              
| RA       |                                                                    |
+----------+--------------------------------------------------------------------+            
| DEC      |                                                                    |
+----------+--------------------------------------------------------------------+            
| PA       |                                                                    |
+----------+--------------------------------------------------------------------+            
| BIAS_LVL |                                                                    |
+----------+--------------------------------------------------------------------+            
| BIAS_RON |                                                                    |
+----------+--------------------------------------------------------------------+            
| BIAS_TOP |                                                                    |
+----------+--------------------------------------------------------------------+          
| BIAS_BTM |                                                                    |
+----------+--------------------------------------------------------------------+          
| BIAS_LFT |                                                                    |
+----------+--------------------------------------------------------------------+          
| BIAS_RGT |                                                                    |
+----------+--------------------------------------------------------------------+          
| BZERO    |                                                                    |
+----------+--------------------------------------------------------------------+                          
| BSCALE   |                                                                    |
+----------+--------------------------------------------------------------------+                          
| EXPTIME  |                                                                    |
+----------+--------------------------------------------------------------------+                          
   
.. DetailedDescEnd