PDS_VERSION_ID        = PDS3                                                  
RECORD_TYPE           = STREAM                                                
OBJECT                = TEXT                                                  
  INTERCHANGE_FORMAT  = ASCII                                                 
  PUBLICATION_DATE    = 2001-09-01                                            
  NOTE                = "N/A"                                                 
END_OBJECT            = TEXT                                                  
                                                                              
END                                                                           
                                                                              
1. Introduction:                                                              
The CALIB directory contains a set of files that were derived                 
from the NEAR GRS Calibration Documentation.  The tables                      
provided are summary information from the figures extracted                   
from that documentation.                                                      
                                                                              
For full description of the NEAR GRS ground calibration                       
process and the full set of tables listed below:                              
                                                                              
please consult:                                                               
                                                                              
           EVANS ET AL. ICARUS VOL. 147, 498-519 (2000)                       
                                                                              
2. Directory Contents:                                                        
                                                                              
CALINFO.TXT          This file                                                
                                                                              
GCALOVER.TXT         Summary of Calibration Process and use                   
                     of DATA.                                                 
                                                                              
GRSFIG05A.TAB                                                                 
              SPECTRA (NAI AND ANTI_COINCIDENCE) TAKEN WITH A CR51 SOURCE     
                                                                              
GRSFIG05B.TAB                                                                 
              SPECTRA (NAI AND ANTI_COINCIDENCE) TAKEN WITH A CS137 SOURCE    
                                                                              
GRSFIG05C.TAB                                                                 
              SPECTRA (NAI, ANTI, BOTH ESCAPE) TAKEN WITH A CS137 SOURCE      
                                                                              
GRSFIG05D.TAB                                                                 
              SPECTRA (NAI,ANTI,BOTH ESCAPE)TAKEN WITH A PUC 6.13 MEV SOURCE  
                                                                              
GRSFIG06.TAB                                                                  
              MEASURED INTRINSIC PEAK EFFICIENCY OF CENTRAL DETECTOR          
                                                                              
GRSFIG07.TAB                                                                  
              MEASURED INTEGRAL LINEARITY WITH A LINEAR FIT                   
              TO THE DATA.                                                    
                                                                              
GRSFIG08.TAB                                                                  
              MEASURED INTEGRAL LINEARITY WITH A SECOND                       
              ORDER POLYNOMIAL FIT TO THE DATA.                               
                                                                              
GRSFIG09.TAB                                                                  
              ENERGY RESOLUTION AS A FUNCTION OF ENERGY                       
              MEASURED WITH THE GROUND SUPPORT EQUIPMENT                      
                                                                              
GRSFIG10.TAB                                                                  
              INTRINSIC FULL ENEGY PEAK EFFICIENCY FOR                        
              CENTRAL DETECTOR (WITHOUT PMT) - ORBITAL MEASUREMENTS           
                                                                              
GRSFIG11.TAB                                                                  
              RATIO OF ESCAPE PEAK EFFICIENCY TO FULL                         
              ENERGY PEAK EFFICIENCY.                                         
                                                                              
GRSFIG12.TAB                                                                  
              ESCAPE PEAK EFFICIENCY FOR ORBITAL                              
              MEASUREMENTS (FIRST AND SECOND ESCAPE INCLUDED).                
                                                                              
GRSFIG13A.TAB                                                                 
              GAMMA RAY SPECTROMETER ANGULAR RESPONSE AT                      
              320 KEV.                                                        
                                                                              
GRSFIG13B.TAB                                                                 
            GAMMA RAY SPECTROMETER ANGULAR RESPONSE AT                        
            1115 KEV.                                                         
                                                                              
GRSFIG14.TAB                                                                  
            SPECTRUM TAKEN WITH A LARGE SOIL SAMPLE AND                       
            A 14 MEV NEUTRON SOURCE (NAI ANTI_COINCIDENCE)                    
                                                                              
GRSFIG15A.TAB                                                                 
            NAI LOW LEVEL DISCRIMINATOR CALIBRATION                           
                                                                              
GRSFIG15B.TAB                                                                 
            BGO LOW LEVEL DISCRIMINATOR CALIBRATION                           
                                                                              
GRSFIG16.TAB                                                                  
            HIGH VOLTAGE SETTINGS VS GAIN (DURING CRUISE)                     
                                                                              
3. Cognizant Persons                                                          
                                                                              
NEAR/XGRS data were provided by Jacob Trombka, NEAR XGRS Team Leader:         
                                                                              
Jacob Trombka                                                                 
Building 2, Rm# 165                                                           
Code 691, Astrochemistry Branch                                               
NASA/Goddard Space Flight Center                                              
Greenbelt, MD 20771.                                                          
                                                                              
jack.trombka@gsfc.nasa.gov                                                    
301-286-5941                                                                  
                                                                              
This volume was designed and produced by:                                     
                                                                              
Tim McClanahan                                                                
Building 2, # 166                                                             
Code 691, Astrochemistry Branch                                               
NASA/ Goddard Space Flight Center                                             
Greenbelt, MD 20771