PDS_VERSION_ID        = PDS3                                                  
RECORD_TYPE           = STREAM                                                
OBJECT                = TEXT                                                  
  PUBLICATION_DATE      = 2003-09-29                                          
  NOTE                  = "INFO.TXT describes the MARIE calibrated            
                           data available on this volume."                    
END_OBJECT            = TEXT                                                  
END                                                                           
                                                                              
The DATA/REDUCED directory contains the MARIE calibrated (RDR)                
data.  These data were acquired by the MARIE instrument aboard                
the Mars Odyssey spacecraft.                                                  
                                                                              
The RDR data set consists of ASCII tabular files which contain                
information about events detected by the MARIE instrument.  Each              
record in these files contains data pertaining to a specific                  
event.  An event is considered to occur when a signal is detected             
by the A1 and A2 cards and is above threshold for both of these cards.        
                                                                              
IMPORTANT:  Please note that the time tags of these data                      
contain errors.  See the file ERRATA.TXT on this disk for                     
details on these and other problems regarding the disk.                       
                                                                              
A detailed description of the raw data is found in the file                   
/CATALOG/CALIBRATED_DATASET.CAT on this disk.                                 
                                                                              
The data files in the REDUCED directory are organized into                    
one-month subdirectories.  Each such subdirectory contains the data           
for one calendar month, as determined from the dates in the names             
of the data files.                                                            
                                                                              
The naming conventions for the files and subdirectories                       
are as follows.  Please note that these are NOT the same as                   
the naming conventions for raw data (see below for details).                  
                                                                              
File name EVN01174_01.TAB is interpreted as:                                  
                                                                              
    EVN = file type (event file)                                              
    01  = year 2001                                                           
    174 = day of year 174 (where Jan. 1 = day of year 001)                    
    01  = file starting with event number 1 for the time period               
          (this information is useful in case there is more than              
          one file for a day)                                                 
    TAB = ASCII table file                                                    
                                                                              
                                                                              
Subdirectory name 01_06JUN is interpreted as:                                 
                                                                              
    01 = year 2001                                                            
    06JUN = sixth month, June                                                 
                                                                              
The month is referenced twice in each subdirectory name - first as a          
number (06) to facilitate automatic search, then as an abbreviation           
(JUN) to make the name more human-readable.                                   
                                                                              
Note that the 'starting day' for a reduced data file is the first day         
of the data in the file.  This is different from the way that the             
'starting day' is defined for the naming convention for raw data event        
or count files (in /DATA/RAW_DATA).                                           
                                                                              
The detached PDS label file describing the file EVN01174_01.TAB is named      
EVN01174_01.LBL.                                                              
                                                                              
In addition to the data files, this disk contains documentation files         
which describe the data sets on the disk, the instrument from which the       
data came, and the Mars Odyssey spacecraft and mission. These                 
files are found in the CATALOG and DOCUMENT directories, and are              
described in the files CATALOG/CATINFO.TXT and DOCUMENT/DOCINFO.TXT.