.. _VisMasterBiasFrame:

=============================
Vis Master Bias Frame Product
=============================

Metadata
______________________

+------------------------------------------------+----------------------------------------------------------------------------------------------+
| Data product name                              | DpdVisMasterBiasFrame                                                                        |
+------------------------------------------------+----------------------------------------------------------------------------------------------+
| Data product custodian                         | VIS                                                                                          |
+------------------------------------------------+----------------------------------------------------------------------------------------------+
| Name of the Schema file                        | .. raw:: html                                                                                |
|                                                |                                                                                              |
|                                                | `euc-vis-MasterBiasFrame.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-MasterBiasFrame.xsd>`_                      |
+------------------------------------------------+----------------------------------------------------------------------------------------------+
| Processing Element(s) creating/using the data  | Final data product of the Master Bias Calibration pipeline.                                  |
| product                                        | Used by the Bias Correction task in several pipelines: (ProcessField, LargeFlat, CTI,        |
|                                                | DistortionModel, PRNU Small Scale Flat, NonLinearity, BrighterFatter, XTalk).                |
+------------------------------------------------+----------------------------------------------------------------------------------------------+
| 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:visMasterBiasFrame        |
+--------------+----------------------------------------------+
| QualityFlags | object of type dqc:sqfPlaceHolder            |
+--------------+----------------------------------------------+
| Parameters   | object of type ppr:genericKeyValueParameters |
+--------------+----------------------------------------------+
   
Detailed description of the data product
========================================
.. DetailedDescStart

This product is the master bias produced by the the Master Bias Calibration Pipeline.
It is a FITS file of 144 extensions (one per quadrant) that contains the offset of each pixel relative to the pedestal, 
calculated as the sigma-clipped mean pixel value on a series of bias calibration exposures.

**Name of file:**

``EUC_VIS_MSR-BIA-000-000000-0000000__[YYYYMMDDThhmmss.s]Z.fits``

where the date is the production date.

These bias are obtained shutter closed with an exposure time of 0s.

In bias, straylight is also visible. For now, we have not taken this effect into account when selecting the bias for the production of this product.

The pedestal is a constant bias offset per quadrant, added by the electronics. 
A rectangular region relative to the readout note, where the image area containing no other signal that the interconnection voltage, is used to measure the pedestal of each frame. 
That is subtracted from each frame before all measurment.  

See https://euclid.roe.ac.uk/dmsf/files/17151/view for more detail.

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_TIME)        |
+----------+--------------------------------------------------------------------+                                                         
| 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   |                                                                    |
+----------+--------------------------------------------------------------------+                                                  
| 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 |  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 |  True if nominal CDPU-PMCU-CU-RSU chain is active                  |
+----------+--------------------------------------------------------------------+     
| 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 |  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                                                      |
+==========+====================================================================+
| 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-board                |
+----------+--------------------------------------------------------------------+                                                          
| GAIN     |                                                                    |
+----------+--------------------------------------------------------------------+          
| RDNOISE  |                                                                    |
+----------+--------------------------------------------------------------------+           
| RA       |                                                                    |
+----------+--------------------------------------------------------------------+                     
| DEC      |                                                                    |
+----------+--------------------------------------------------------------------+                     
| PA       |                                                                    |
+----------+--------------------------------------------------------------------+                     
| BZERO    |                                                                    |
+----------+--------------------------------------------------------------------+                     
| BSCALE   |                                                                    |
+----------+--------------------------------------------------------------------+                     
| STKCOUNT |   Number of frames used for that quadrant                          |
+----------+--------------------------------------------------------------------+                     

.. DetailedDescEnd