PDS_VERSION_ID = PDS3                                                         
RECORD_TYPE    = STREAM                                                       
OBJECT         = TEXT                                                         
  PUBLICATION_DATE = 2003-08-19                                               
  NOTE             = "EXTRINFO.TXT describes the files in the EXTRAS          
                      directory of this disk."                                
END_OBJECT     = TEXT                                                         
END                                                                           
                                                                              
The EXTRAS directory contains files which facilitate the use of the           
data on the disk, but which are not actually required for the use or          
understanding of those data. The main files in the EXTRAS directory           
are HTML documents which can be viewed with a Web browser and used to         
navigate the disk via links. These files include:                             
                                                                              
BROWSE.HTM   - an HTML document with links to browse plots                    
                                                                              
CATALOG.HTM  - an HTML document with links to CATALOG files                   
                                                                              
DOCUMENT.HTM - an HTML document with links to DOCUMENT files                  
                                                                              
GEOMETRY.HTM - an HTML document with links to GEOMETRY files                  
                                                                              
MAGDATA.HTM  - an HTML document with links to Magnetometer (MAG) data         
               files, and to other files relevant to those data               
                                                                              
ER3DDATA.HTM - an HTML document with links to Electron Reflectometer          
               (ER) 3D data files, and to other files relevant to those       
               data                                                           
                                                                              
ERHRDATA.HTM - an HTML document with links to Electron Reflectometer          
               (ER) High Resolution data files, and to other files            
               relevant to those data                                         
                                                                              
ERLRDATA.HTM - an HTML document with links to Electron Reflectometer          
               (ER) Low Resolution data files, and to other files             
               relevant to those data                                         
                                                                              
TRAJECT.HTM  - an HTML document with links to trajectory data files           
                                                                              
In addition, there are files with links to data for a particular month.       
These have names of the form tt_mmm.HTM, where tt is the data type            
(MA = Magnetometer, 3D = ER 3D, EH = ER high-resolution, EL = ER              
low-resolution) and mmm is the three-letter month abbreviation.               
                                                                              
All of these HTML files may be accessed individually or may be reached        
from links in the HTML file AAREADME.HTM, which is in the root directory      
of the disk.