PDS_VERSION_ID     = PDS3                                                    
 RECORD_TYPE        = STREAM                                                  
 OBJECT             = TEXT                                                    
  PUBLICATION_DATE  = 1998-05-01                                              
   NOTE             = "This file describes the contents of the binary data    
                       files."                                                
 END_OBJECT         = TEXT                                                    
END                                                                           
                                                                              
EV data files                                                                 
=============                                                                 
                                                                              
The file names for ULYSSES-KEP Experiment EV data files are:                  
                                                                              
    EVyearday.BIN  example: EV92013.BIN                                       
                                                                              
Data are written in a 3 bytes per event data stream with a                    
variable record length. dE=0 and dx=0 records are excluded.                   
Each file contains the events of one day. The date of the                     
corresponding day is part of the file name.                                   
                                                                              
                                                                              
Contents of the 3 bytes:                                                      
----------------------------------------------------------------              
 Byte One:    E (channel number)                                              
                                                                              
 Byte Two:    dE (channel number)                                             
                                                                              
 Byte Three:  ER * 128 + SpID * 16+ TID * 4 + SeID                            
                                                                              
with: ER   = Energy Range. 0 or 1, for lower or upper part                    
             E=E+256*SpID [ idl code: E=E+255*SpID ]                          
      SpID = Species ID, [0,1,2,3,4] for out and HS 1,2,3,4                   
      TID  = Telescope ID, [0,1,2,3] for Telescope 1,2,3,4                    
      SeID = Sector ID, [0,1,2,3] for Sector 1,2,3,4                          
                                                                              
------------------------------------------------------------------            
                                                                              
                                                                              
The data are written with the following IDL code:                             
------------------------------------------------------------------            
                                                                              
 barr=BYTARR(3,vcounts)                                                       
 barr(0)=byte(E(index))                                                       
 barr(1)=byte(dE(index))                                                      
 barr(2)=byte(ER(index)*128+SpID(index)*16+TID(index)*4+SeID(index))          
                                                                              
   with: index:   array index of valid data points                            
         vcounts: number of valid data points                                 
                                                                              
                                                                              
File opening:                                                                 
under VMS:                                                                    
                                                                              
 openw,1,outputfile,/NONE, /BLOCK                                             
                                                                              
under other systems:                                                          
                                                                              
 openw,1,outputfile                                                           
                                                                              
                                                                              
Writing:                                                                      
                                                                              
 WRITEU,1,barr                                                                
                                                                              
                                                                              
--------------------------------------------------------------------          
                                                                              
Notes: E and dE channel numbers can be converted to energy using              
       the IDL code contained in CHANTOEN.TXT.