***** File MODE_BIN.DOC                                                       
                                                                              
Mission: VEGA 1                                                               
Instrument: PUMA                                                              
Submission: IKI Binary File                                                   
                                                                              
                                                                              
Original Format                                                               
                                                                              
    The data for these files were received as a single file containing 6400   
    binary spectra with their parameter values, combined into a single table. 
    The spectra in this table appeared to constitute a superset of the FITS   
    spectra in the other submission from IKI.  The actual parameter values    
    and spectrum bytes were in the same order and format as in the separate   
    FITS files of that submission.  As in that dataset, the spectrum format   
    varied slightly with mode.  In the amplitude sample bytes of the spectra, 
    the sign bit was used as a flag bit to indicate amplitude-triggered       
    samples.  In this form a value of 1 (sign bit set) indicated a non-       
    triggered value.                                                          
                                                                              
                                                                              
                                                                              
Reformatting at SBN                                                           
                                                                              
    The following changes were made to the data:                              
                                                                              
    o  The single table was split into one table for each mode.               
                                                                              
    o  The sign bit in all spectrum samples was turned off.                   
                                                                              
    o  The mode 1, 2 and 3 spectra, the only ones which included sample       
       flagging, were expanded so that a separate flag field could be         
       associated with each amplitude sample.                                 
                                                                              
    o  Where the sample had previously been flagged as amplitude-triggered    
       (original sign bit not equal to 1), the accompanying flag byte was     
       set equal to 1.                                                        
                                                                              
    o  The spectrum length parameter was adjusted to give the total number    
       of bytes in the spectrum itself, without the parameter values. (The    
       length of the parameter values was included in the original field.)    
                                                                              
    o  All spectra were then padded with nulls (zeroes) out to the maximum    
       spectrum length of the particular mode.                                
                                                                              
    o  The original ordering of the spectra in the single binary table,       
       assumed to be chronological, was preserved in the mode tables.         
                                                                              
                                                                              
                                                                              
Known Anomalies/Problems:                                                     
                                                                              
    o  Little or no explanation was available for some of the parameters in   
       the spectrum headers.  This is indicated in the DESCRIPTION part of    
       the PDS label for these datasets.                                      
                                                                              
    o  There are more spectra in this submission than in the FITS files       
       also submitted by IKI or the text files submitted by MPI.  These data  
       appear to be a strict superset of the IKI FITS tables, with most but   
       not all of the "extra" spectra in this submission having later time    
       values than the spectra in the other dataset.  However, while there is 
       a large amount of overlap between the IKI and MPI submissions, each    
       contains spectra not included in the other.                            
                                                                              
    o  It has not yet been possible to translate the times in this file,      
       which are apparently in units of seconds, to UT.                       
                                                                              
    o  Four spectra, ostensibly of mode 2, were found which had sequence      
       number and event number equal to 0 and odd spectrum lengths, which     
       should have been even.  The first three of these spectra are           
       identical, the fourth differs only in a few spectrum values.  These    
       spectra were omitted from the binary mode 2 table, but their text      
       form is included here:                                                 
                                                                              
         SEQ      0  ENR      0  TIME      0  LEN 195  DIST      0            
         VOL    0  IMP  35  LIMP  32  SIMP   3  CC   0/ 64/  0/  0/  0        
         SEN 202/128/  0/  0/  0  MODE 2  CLASS   2                           
         AMP 205/ 80/ 64/ 14/137  NOISE   0/  0/ 72                           
                                                                              
            0   0X   0  77   64  18X 242  96  248   0X   0   0X               
            1  12X  14   9  138   0X   9   3X   0   0X   0   0X               
            0   0X   0  77   80   0X   2  38X  40   0X   2  35X               
           40   0X   0   3X   0   0    0   0X   1   0X   0   0X               
            0   0X   0   0X   1   0X   0   0X   0   0X  14  10                
           64   0X   0   8X  24  71X 240  48X  12  66  214  87                
          193  64X 243  75X 240  24X  33  65X   0   0X 120  88X               
           16  80   76  30X   1  85X   0  64   12  71X 208  48X               
           38  88X 240  64  116   5X 239  88X 240  80   72  16                
          240  16X  72  80X 208  16X   4  24X 209  18  136  80                
            0  18    0  80    1  88X  16  80    4   0                         
                                                                              
                                                                              
        SEQ      0  ENR      0  TIME      0  LEN 195  DIST      0             
        VOL    0  IMP  35  LIMP  32  SIMP   3  CC   0/ 64/  0/  0/  0         
        SEN 202/128/  0/  0/  0  MODE 2  CLASS   2                            
        AMP 205/ 80/ 64/ 14/137  NOISE   0/  0/ 72                            
                                                                              
            0   0X   0  77   64  18X 242  96  248   0X   0   0X               
            1  12X  14   9  138   0X   9   3X   0   0X   0   0X               
            0   0X   0  77   80   0X   2  38X  40   0X   2  35X               
           40   0X   0   3X   0   0    0   0X   1   0X   0   0X               
            0   0X   0   0X   1   0X   0   0X   0   0X  14  10                
           64   0X   0   8X  24  71X 240  48X  12  66  214  87                
          193  64X 243  75X 240  24X  33  65X   0   0X 120  88X               
           16  80   76  30X   1  85X   0  64   12  71X 208  48X               
           38  88X 240  64  116   5X 239  88X 240  80   72  16                
          240  16X  72  80X 208  16X   4  24X 209  18  136  80                
            0  18    0  80    1  88X  16  80    4   0                         
                                                                              
                                                                              
        SEQ      0  ENR      0  TIME      0  LEN 195  DIST      0             
        VOL    0  IMP  35  LIMP  32  SIMP   3  CC   0/ 64/  0/  0/  0         
        SEN 202/128/  0/  0/  0  MODE 2  CLASS   2                            
        AMP 205/ 80/ 64/ 14/137  NOISE   0/  0/ 72                            
                                                                              
            0   0X   0  77   64  18X 242  96  248   0X   0   0X               
            1  12X  14   9  138   0X   9   3X   0   0X   0   0X               
            0   0X   0  77   80   0X   2  38X  40   0X   2  35X               
           40   0X   0   3X   0   0    0   0X   1   0X   0   0X               
            0   0X   0   0X   1   0X   0   0X   0   0X  14  10                
           64   0X   0   8X  24  71X 240  48X  12  66  214  87                
          193  64X 243  75X 240  24X  33  65X   0   0X 120  88X               
           16  80   76  30X   1  85X   0  64   12  71X 208  48X               
           38  88X 240  64  116   5X 239  88X 240  80   72  16                
          240  16X  72  80X 208  16X   4  24X 209  18  136  80                
            0  18    0  80    1  88X  16  80    4   0                         
                                                                              
                                                                              
        SEQ      0  ENR      0  TIME      0  LEN 195  DIST      0             
        VOL    0  IMP  35  LIMP  32  SIMP   3  CC   0/ 64/  0/  0/  0         
        SEN 202/128/  0/  0/  0  MODE 2  CLASS   2                            
        AMP 205/ 80/ 64/ 14/137  NOISE   0/  0/ 72                            
                                                                              
            0   0X   0  77   64  18X 242  96  248   0X   0   0X               
            1  12X  14   9  138   0X   9   3X   0   0X   0   0X               
            0   0X   0  77   80   0X   2  41X  40   0X   2  38X               
           40   0X   0   3X   0   0    0   0X   1   0X   0   0X               
            0   0X   0   0X   1   0X   0   0X   0   0X  14  10                
           64   0X   0   8X  24  71X 240  48X  12  66  214  87                
          193  64X 243  75X 240  24X  33  65X   0   0X 120  88X               
           16  80   76  30X   1  85X   0  64   12  71X 208  48X               
           38  88X 240  64  116   5X 239  88X 240  80   72  16                
          240  16X  72  80X 208  16X   4  24X 209  18  136  80                
            0  18    0  80    1  88X  16  80    4   0