PDS_VERSION_ID        = PDS3                                                  
RECORD_TYPE           = "STREAM"                                              
                                                                              
OBJECT                = TEXT                                                  
  PUBLICATION_DATE    = 2011-09-01                                            
  NOTE                = "Description of contents of EXTRAS directory"         
END_OBJECT            = TEXT                                                  
END                                                                           
                                                                              
                                                                              
The EXTRAS directory contains additional elements that may be useful          
but not essential for understanding this dataset.  Elements are not           
required to be compliant with the PDS standards.                              
                                                                              
                                                                              
EXTRINFO.TXT                                                                  
  - The file you are reading now.                                             
                                                                              
[DATA_EXCEL]                                                                  
A15_SMSS_71_M016935_*.XLS                                                     
  - This subdirectory provides the Excel 1997-2004 (*.xls) version of the     
    Apollo 15 Soil Mechanics data products located in the DATA/ directory     
    of this dataset.                                                          
                                                                              
[VIDEOS]                                                                      
A15_LSRP_*.RM                                                                 
  - This subdirectory provides the Real Media (*.rm) version of the           
    Apollo 15 Soil Mechanics videos located in the DOCUMENT/VIDEOS/           
    directory of this dataset.  For some movies, this format provides         
    a slightly better resolution than the MPEG-4 format used in the           
    DOCUMENT directory.  The estimated start times of the movies              
    can be found in the PDS labels in the DOCUMENT/VIDEOS/.