PDS_VERSION_ID     = PDS3                                                     
RECORD_TYPE        = "STREAM"                                                 
                                                                              
OBJECT             = TEXT                                                     
  NOTE             = "AAREADME file for the Apollo 15                         
    X-Ray Fluorescence Spectrometer Dataset"                                  
  PUBLICATION_DATE = 2007-06-29                                               
END_OBJECT         = TEXT                                                     
                                                                              
END                                                                           
                                                                              
Introduction                                                                  
============                                                                  
  This dataset contains two tables of time-ordered, event count rates         
  acquired by the Apollo 15 X-Ray Fluorescence Spectrometer from 30 July      
  to 04 August 1971 during lunar orbit.  The tables include counts for        
  all channels of the three proportional counters (unfiltered, magnesium      
  filter, aluminum filter) and the solar monitor.                             
                                                                              
                                                                              
Volume Format                                                                 
=============                                                                 
  This single-volume dataset has been formatted according to the ISO-9660     
  level 2 Interchange Standard for directories and file names as described    
  in Version 3.7 of the PDS Standards Reference.                              
                                                                              
                                                                              
File Formats                                                                  
============                                                                  
  All text documents and other meta information files such as descriptions,   
  PDS object definitions, and detached PDS labels are stream format files,    
  with a carriage return (ASCII 13) and a line feed character (ASCII 10) at   
  the end of the record.  This allows the files to be read by various         
  operating systems.                                                          
                                                                              
                                                                              
Volume Contents                                                               
===============                                                               
  Files on this volume are organized into a set of subdirectories below the   
  top-level directory.  The following list shows the structure and content.   
  Directory names are enclosed in square brackets ([ ]).  See the *INFO.TXT   
  files in some directories for specific information on the files in that     
  directory.                                                                  
                                                                              
  [TOP-LEVEL-DIRECTORY]                                                       
  |                                                                           
  |-- AAREADME.TXT     This file                                              
  |                                                                           
  |-- VOLDESC.CAT      Description of logical contents of this volume         
  |                                                                           
  |--[CATALOG]         Directory containing PDS catalog files providing       
  |                    overviews of the mission, instrument, and dataset      
  |                                                                           
  |--[DATA]            Directory containing the data products                 
  |  |                                                                        
  |  |-- A15_XRFS_71_EXTENDED_MODE.TAB  Table of XRFS extended mode counts    
  |  |-- A15_XRFS_71_EXTENDED_MODE.LBL  PDS label                             
  |  |-- A15_XRFS_71_NORMAL_MODE.TAB    Table of XRFS normal mode counts      
  |  |-- A15_XRFS_71_NORMAL_MODE.LBL    PDS label                             
  |                                                                           
  |--[DOCUMENT]        Directory containing documentation relevant to this    
  |                    dataset                                                
  |                                                                           
  `--[INDEX]           Directory containing PDS index files