PDS_VERSION_ID        = PDS3                                                  
LABEL_REVISION_NOTE   = "                                                     
   2010-12-07  SBN:T.Barnes   Split NIEROS_2XXX volumes into single datasets  
"                                                                             
RECORD_TYPE           = STREAM                                                
OBJECT                = TEXT                                                  
  INTERCHANGE_FORMAT  = ASCII                                                 
  PUBLICATION_DATE    = 2010-12-07                                            
  NOTE                = "N/A"                                                 
END_OBJECT            = TEXT                                                  
                                                                              
END                                                                           
                                                                              
The CALIB directory contains a set of files that are useful for the           
calibration of the NEAR MultiSpectral Imager (MSI).  These are used           
in conjunction with the MSI calibration software.                             
                                                                              
                                                                              
MSI Flatfield and Point Spread Function Calibration files:                    
==========================================================                    
                                                                              
In order to correct for sensitivity and non-uniformity of the MSI system,     
images were acquired before launch of the interior of a spectralon            
lined integrating sphere (details given in MURCHIE S., M. ROBINSON, S.E       
HAWKINS, III, A. HARCH, P. HELFENSTEIN, P. THOMAS, K. PEACOCK, W. OWEN,       
G. HEYLER, P. MURPHY, E.H.  DARLINGTON, A. KEENEY, R. GOLD, B. CLARK, N.      
IZENBERG, J.F. BELL, III, W. MERLINE, AND J. VEVERKA 1999.  Inflight          
calibration of the NEAR multispectral imager.  Icarus 140, 66-91.)            
                                                                              
For the period of the mission when the transparent cover was used there       
are two flat fields used.  After the cover was removed only one flat          
field is used, the files named with FLAT?_31C.FIT were used for both          
periods.  The * is an integer representing a particular filter                
identification number.                                                        
                                                                              
Non-uniformity correction files used with Cover on                            
==================================================                            
FLAT0_31C.FIT       filter 0                                                  
FLAT1_31C.FIT       filter 1                                                  
FLAT2_31C.FIT       filter 2                                                  
FLAT3_31C.FIT       filter 3                                                  
FLAT4_31C.FIT       filter 4                                                  
FLAT5_31C.FIT       filter 5                                                  
FLAT6_31Cn.FIT      filter 6                                                  
FLAT7_31Cn.FIT      filter 7                                                  
COVERFLATRATIO0.FIT filter 0                                                  
COVERFLATRATIO1.FIT filter 1                                                  
COVERFLATRATIO2.FIT filter 2                                                  
COVERFLATRATIO3.FIT filter 3                                                  
COVERFLATRATIO4.FIT filter 4                                                  
COVERFLATRATIO5.FIT filter 5                                                  
COVERFLATRATIO6.FIT filter 6                                                  
COVERFLATRATIO7.FIT filter 7                                                  
                                                                              
                                                                              
Non-uniformity correction files used with Cover off                           
===================================================                           
FLAT0_31C.FIT       filter 0                                                  
FLAT1_31C.FIT       filter 1                                                  
FLAT2_31C.FIT       filter 2                                                  
FLAT3_31C.FIT       filter 3                                                  
FLAT4_31C.FIT       filter 4                                                  
FLAT5_31C.FIT       filter 5                                                  
FLAT6_31CN.FIT      filter 6                                                  
FLAT7_31CN.FIT      filter 7                                                  
                                                                              
                                                                              
In order to correct the blurring of MSI images due to the deposition          
of contaminants of the optic during an aborted spacecraft burn system         
PSF were derived for each filter (details given in LI, H., M. S.              
ROBINSON, S. L. MURCHIE, AND J. R.  NEUBERT 2000. Remediation of              
Scattered Light in NEAR MSI Images. Lunar and Planetary Science XXXI,         
1790, Lunar and Planetary Institute, Houston. and LI, H., M. S.               
ROBINSON, S. L. MURCHIE 2001 (in press).  Preliminary Remediation of          
Scattered Light in NEAR MSI Images, Icarus.                                   
                                                                              
PSF files                                                                     
================================================                              
F1_512PSF_V2.FIT        filter 1                                              
F2_512PSF_V1.FIT        filter 2                                              
F3_512PSF_V2.FIT        filter 3                                              
F4_512PSF_V2.FIT        filter 4                                              
F5_512PSF_V2.FIT        filter 5                                              
F6_512PSF_V2.FIT        filter 6                                              
F7_512PSF_V2.FIT        filter 7