PDS_VERSION_ID = PDS3                                                         
RECORD_TYPE    = STREAM                                                       
OBJECT         = TEXT                                                         
  PUBLICATION_DATE = 2003-09-19                                               
  NOTE             = "INFO.TXT describes the Magnetometer (MAG) data          
                      available on this volume."                              
END_OBJECT     = TEXT                                                         
END                                                                           
                                                                              
The DATA/MAG directory contains the Magnetometer (MAG) vector data.           
The data files reside in subdirectories containing data from single           
months; the names of these subdirectories indicate the month and year         
of the data (for example, JAN_1998). The file naming convention for           
files in the one-month subdirectories of the DATA/MAG directory is            
as follows:                                                                   
                                                                              
MA980116.TAB is interpreted as                                                
                                                                              
MA  = 'MAG data'                                                              
98  = year 1998                                                               
01  = first month (January)                                                   
16  = sixteenth day of month                                                  
TAB = 'table' format                                                          
                                                                              
MA980116.LBL is the name of the PDS label file which describes the data       
file MA980116.TAB.                                                            
                                                                              
The MAG data files are ASCII tables of 1 day duration in Selenocentric        
Solar Ecliptic (SSE) and Selenographic (SEL) coordinates. The SSE             
coordinate system has its X-axis along the Moon-Sun line, positive            
towards the Sun. The Z-axis is parallel to the northward normal to the        
Earth's ecliptic plane, and Y completes the right-handed set. The SEL         
coordinate system used here is a Cartesian representation that places         
the Z-axis along the rotation axis of the Moon, positive in the               
direction of angular momentum. The X-axis lies in the lunar equatorial        
plane at 0 degrees longitude, and Y completes the right-handed set.           
Each row of data contains 16 columns. Each row is terminated by the           
ASCII record delimiter characters carriage return and line feed.              
                                                                              
In addition to the data files, this disk contains documentation files         
which describe the datasets on the disk, the instruments from which the       
data came, and the Lunar Prospector 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. Of particular         
interest to users of the MAG data is the MAG dataset catalog file,            
MAG_DS.CAT.                                                                   
                                                                              
This disk also contains browse plots (in GIF87A format) summarizing the       
Magnetometer (MAG) and Electron Reflectometer (ER) data on the disk.          
These plots are contained in the BROWSE directory.                            
                                                                              
In addition to accessing the MAG data files directly, users with              
Web browsers can access them via links in the HTML file MAGDATA.HTM           
in the EXTRAS directory, and can navigate the entire disk using the file      
AAREADME.HTM in the disk root directory.