PDS_VERSION_ID = PDS3                                                         
RECORD_TYPE    = STREAM                                                       
OBJECT         = TEXT                                                         
  PUBLICATION_DATE = 2003-08-19                                               
  NOTE             = "INFO.TXT describes the Electron Reflectometer (ER)      
                      low-resolution time series data available on this       
                      volume."                                                
END_OBJECT     = TEXT                                                         
END                                                                           
                                                                              
The DATA/ER_LO_TS directory contains the Electron Reflectometer (ER)          
low-resolution (~80 sec) time series data for all 15 energy channels.         
The bin centers for these energy channels are given in the file               
E_BINS.TAB. The time series 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/ER_LO_TS directory is as follows:                                    
                                                                              
EL980116.TAB is interpreted as                                                
                                                                              
EL  = 'ER low-resolution data'                                                
98  = year 1998                                                               
01  = first month (January)                                                   
16  = sixteenth day of month                                                  
TAB = 'table' format                                                          
                                                                              
EL980116.LBL is the name of the PDS label file which describes the data       
file EL980116.TAB.                                                            
                                                                              
The ER low-resolution data are provided as ASCII tables of 1 day              
duration. Fluxes are provided for 15 energy bins (~40ev - ~20keV)             
collected over 16 spacecraft rotations (~80 sec). The electron                
reflectometer samples 4 pi steradians twice each spin period. Each            
row of data contains 16 columns (a time and 15 fluxes). Each row is           
terminated by the ASCII record delimiter characters carriage return           
and line feed.                                                                
                                                                              
The directory ER_LO_TS also holds a file E_BINS.TAB, which is an ASCII        
table containing energy bin center values for the data. Each row in this      
file consists of two equivalent time items (time in seconds since Jan 1,      
1970 and time in standard PDS format), followed by 15 energy bin              
center values. The time items represent the time at which the bin             
center values took effect. Note that the bin centers for the data in          
ER_LO_TS need not be the same as those for the data in DATA/ER_HI_TS.         
E_BINS.LBL is a detached PDS label for E_BINS.TAB.                            
                                                                              
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 ER low-resolution data is the dataset                
catalog file CATALOG/ERLRTSDS.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 ER low-resolution data files directly,           
users with Web browsers can access them via links in the HTML file            
ERLRDATA.HTM in the EXTRAS directory, and can navigate the entire disk        
using the file AAREADME.HTM in the disk root directory.