PDS_VERSION_ID                = PDS3                                          
RECORD_TYPE                   = STREAM                                        
OBJECT                        = TEXT                                          
  PUBLICATION_DATE              = 2009-04-01                                  
  NOTE                          = "Description of the EXTRAS                  
     directory contents for the Lunar Prospector MAG/ER Level 1 data          
     archive."                                                                
END_OBJECT                    = TEXT                                          
END                                                                           
                                                                              
                   EXTRAS Directory Contents                                  
                                                                              
The EXTRAS directory contains ancillary geometry files for the Lunar          
Prospector data on this disk. The data includes spacecraft attitude,          
spin rate, and ephemeris. Many of these files do not belong to the            
main data set of this archive, but are included here because of their         
usefulness in connection with the main data.                                  
                                                                              
The following files are found in this directory.                              
                                                                              
XTRAINFO.TXT - The file you are reading.                                      
                                                                              
ATTITUDE.TAB - A sparse table giving the time and new spacecraft              
               orientation after each major change in spacecraft              
               attitude or spin rate. Parameters are spin averaged.           
                                                                              
ATTITUDE.LBL - PDS label for ATTITUDE.TAB.                                    
                                                                              
The ATTITUDE.* files were derived from the Lunar Prospector Level 0           
archive.                                                                      
                                                                              
The SPICE kernels provided on this product represent the best data            
available from NAIF at the time of original archiving of the LP data;         
however, each of these kernels is dynamic and is subject to updates with      
time. The official archive of all SPICE products is maintained by the         
Navigation and Ancillary Information Facility (NAIF) at the Jet               
Propulsion Laboratory (JPL) in Pasadena, CA.                                  
                                                                              
In addition to being the PDS archive site for the SPICE kernels, NAIF         
provides and maintains a software toolkit (SPICELIB) for accessing            
the kernels. For more information about NAIF or SPICELIB please visit         
the NAIF website (http://pds.jpl.nasa.gov/naif.html).                         
                                                                              
LP_EPHEM.TSP - A SPICE spacecraft/planetary ephemeris kernel that             
               contains ephemerides for the Earth, Moon, and Sun. This        
               kernel can be used to generate LP trajectory data in           
               alternative coordinate systems and to generate                 
               transformation matrices that can rotate the magnetometer       
               data into these systems. This kernel is provided in            
               transfer format.                                               
                                                                              
P_CONST.TPC    A SPICE kernel containing planetary constants data in          
               transfer format.                                               
                                                                              
LEAP_SEC.TLS   A SPICE kernel containing leapsecond data in transfer          
               format.                                                        
                                                                              
The following file, though not a SPICE kernel, serves related purposes:       
                                                                              
MOON_POS.TAB   A table of positions of the Moon relative to Earth.            
                                                                              
Each kernel is accompanied on the disk by a detached PDS label file,          
which has the same filename but with the extension replaced by .LBL.