Each row in the daily time files of the yymm directories represents an image 
and contains the following 11 columns: 

filename  date    seconds  roll  ctr_x  ctr_y  stars stars  roll  ctr_x  ctr_y
--------  ------  -------  ----  -----  -----  ----- -----  ----  -----  -----
dddddddd  yymmdd   since   from   from   from  used  total  from  from   from
  .fts             start   stars  stars  stars              med.  med.    med.
                  of day

Note: 51 points width medians were used to generate the median sun centers
      and roll angles from the stars values.