PDS_VERSION_ID        = PDS3                                                  
RECORD_TYPE           = STREAM                                                
OBJECT                = TEXT                                                  
  PUBLICATION_DATE      = 2003-09-30                                          
  NOTE                  = "INFO.TXT describes the MARIE ancillary             
                           data available on this volume."                    
END_OBJECT            = TEXT                                                  
END                                                                           
                                                                              
The DATA/ANCIL directory contains the MARIE ancillary data.  These            
data are part of the raw data set, but are ancillary to the primary           
(event and count) data.                                                       
                                                                              
The ancillary data are comprised of files of four different types.            
Each type has its own subdirectory under ANCIL.  These types are:             
                                                                              
                                                                              
(1)  Detector files (file type DET):  These are ASCII table files             
which describe the detector temperatures.  At the beginning of each           
file is a table header which names the columns.                               
                                                                              
(2)  High Voltage files (file type EXT):  These are ASCII table files         
which describe the voltages in the electronic boards.  At the beginning       
of each file is a table header which names the columns.                       
                                                                              
(3)  Board files (file type BRD):  These are ASCII table files                
which describe the board temperatures.  At the beginning of each              
file is a table header which names the columns.                               
                                                                              
(4)  Power files (file type PWR):  These are ASCII table files                
which describe the power consumption of the detectors.  At the                
beginning of each file is a table header which names the columns.             
                                                                              
                                                                              
A detailed description of the raw data is found in the file                   
/CATALOG/RAW_DATASET.CAT on this disk.                                        
                                                                              
The data files each subdirectory of ANCIL 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 ancillary data files and subdirectories        
are as follows:                                                               
                                                                              
                                                                              
File name BRD01175_02.TAB is interpreted as:                                  
                                                                              
    BRD = file type (in this case, a board file)                              
    01  = year 2001                                                           
    175 = day of year 175 (where Jan. 1 = day of year 001)                    
    02  = second file of day (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 file is not the first day of the data      
in the file, but the day that the data were downloaded by the instrument      
team.  This is different from the way that the 'starting day' is defined      
for naming of calibrated data files (in /DATA/REDUCED).  To find out which    
days of data are in a raw data file, consult the START_TIME and STOP_TIME     
lines in the detached PDS label file (*.LBL) accompanying the data file.      
                                                                              
The detached PDS label file describing the file BRD01175_02.TAB is named      
BRD01175_02.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.