PDS_VERSION_ID        = PDS3                                                  
RECORD_TYPE           = STREAM                                                
OBJECT                = TEXT                                                  
  PUBLICATION_DATE    = 2016-09-26                                            
  NOTE                = "Description of the CALIB directory contents."        
END_OBJECT            = TEXT                                                  
END                                                                           
                                                                              
The CALIB directory contains all of the files required to produce the         
calibrated VIR VIS (1b/RDR) data from the uncalibrated (1a/EDR) data. Note    
that V2 of the VIS calibration data are identical V1, but are provided for    
consistency with the IR. A document describing the calibration procedure is   
provided in this archive in the DOCUMENT/VIR_CALIBRATION directory. A document
describing the VIR internal lamp is provided in the directory                 
DOCUMENT/VIR_LAMP_DESCRIPTION. This document contains information extracted   
from [MELCHIORRIETAL2003]. The following files and their PDS labels are       
provided here:                                                                
                                                                              
DAWN_VIR_VIS_HIGHRES_SPECAL_V2.TAB    Wavelengths of the 432 bands of the     
                                      visible focal plane for high spectral   
                                      modes.                                  
                                                                              
DAWN_VIR_VIS_NOMRES_SPECAL_V2.TAB     Wavelengths of the 144 bands of the     
                                      visible focal plane for low spectral    
                                      modes                                   
                                                                              
DAWN_VIR_VIS_RESP_V2.DAT              DAWN-VIR VIS responsivity in            
                                      (DN*m^2*um*sterad)/(W*s)                
                                                                              
DAWN_VIR_VIS_SOLAR_SPECTRUM_V2.TAB    Solar spectrum irradiance for the VIS   
                                      channel, obtained from the convolution  
                                      of the Cebula+Kurucz spectrum with VIR  
                                      spectrum resolution using the           
                                      ENVI_RESAMPLE_SPECTRA procedure.        
                                                                              
DAWN_VIR_VIS_WIDTH144_V2.TAB          Wavelengths of the 144 widths of the    
                                      visible focal plane for low spectral    
                                      modes                                   
                                                                              
DAWN_VIR_VIS_WIDTH432_V2.TAB          Wavelengths of the 432 widths of the    
                                      visible focal plane for high spectral   
                                      modes.