CDBS FOS Page

Note: When accessing files, be aware of the different formats these files and tables are in (File Structures). If you pull the data out in the wrong format, your data might be

• FOS:
  • YREF: Reference Files
  • YTAB: Reference Tables
  • MTAB: (Hstcomp and Hstgraph tables)

• Types of data:
  • Background, Flat Field, Inverse Sensitivity
  • Wave Retardation, Disabled Diode, Data Quality
  • Point Spread Functions, Line Spread Functions
  • Aperture Parameters, Aperture Position parameters
  • Emission lines, Detector parameters
  • Polarimetry Reduction, Sky Shift Parameters
  • Wavelength Parameters, Scale Factors for GIMP
  • Predicted Mean Background Count Rates (function of Geomag. Pos.)
  • Scattered Light Correction Parameters
  • OTA Focus History, Aperture Throughput Coefficients Versus Focus
  • Aperture Throughput Coefficients Nominal Focus, Paired Pulse
  • Correction Factors for Changes in Detector Sensitivity

FOS reference data consists of 9 reference file types and 15 table types. The information listed below gives a simple discription of each along with how each are named.

Reference File Type and Extensions 
 

FOS reference files
===============
                                           ASSOCIATED           DATABASE
ROOT     EXTENSION  FILE_TYPE              DATA QUALITY FILE    RELATION
--------------------------------------------------------------------------
ROOTNAME.R0H                                                 FOS FILE and ROW 
ROOTNAME.R0D        BAC (BACKGROUND)

ROOTNAME.R1H                                                     
ROOTNAME.R1D        FLT (FLAT FIELD)

ROOTNAME.R2H                                                     
ROOTNAME.R2D        IVS (INVERSE SENSITIVITY)

ROOTNAME.R3H                                                     
ROOTNAME.R3D        RET (WAVE RETARDATION)

ROOTNAME.R4H                                                     
ROOTNAME.R4D        DDT (DISABLED DIODE)

ROOTNAME.R5H                                                     
ROOTNAME.R5D        QIN (DQ INIT)

ROOTNAME.R6H                                                     
ROOTNAME.R6D        POINT SPREAD FUNCTION

ROOTNAME.R7H                                                     
ROOTNAME.R7D        LINE SPREAD FUNCTION

ROOTNAME.R8H                                                     
ROOTNAME.R8D        AVERAGE INVERSE SENSITIVITY
----------------------------------------------------------------------------
FOS sdas Tables
===============
ROOTNAME.CY0       FOS APERTURE PARAMETERS                       
ROOTNAME.CY1       FOS APERTURE POSITION PARAMETERS              
ROOTNAME.CY2       FOS EMISSION LINES                            
ROOTNAME.CY3       FOS DETECTOR PARAMETERS                       
ROOTNAME.CY4       FOS POLARIMETRY REDUCTION PARAMETERS          
ROOTNAME.CY5       FOS SKY SHIFT PARAMETERS                      
ROOTNAME.CY6       FOS WAVELENGTH PARAMETERS                     
ROOTNAME.CY7       FOS SCALE FACTORS FOR GIMP                    
ROOTNAME.CY8       FOS PREDICTED MEAN BACKGROUND COUNT RATES     
                   AS A FUNCTION OF GEOMAGNETIC POSITION.       

ROOTNAME.CY9       FOS SCATTERED LIGHT CORRECTION PARAMETERS     
ROOTNAME.CYA       OTA FOCUS HISTORY                             
ROOTNAME.CYB       APERTURE THROUGHPUT COEFFICIENTS AT NOMINAL   
                   FOCUS             
ROOTNAME.CYC       APERTURE THROUGHPUT COEFFICIENTS              
                   VERSUS FOCUS
ROOTNAME.CYD       CORRECTION FACTORS FOR CHANGES IN DETECTOR    
                   SENSITIVITY        
ROOTNAME.CMG       PAIRED PULSE PARAMETERS                       

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Pipeline Processing by CALFOS

Calibration Steps and Reference Files for the FOS Pipeline Processing

CDBS Operations Page