DATA FILE NAME ../pingdata/PINGDATA.000 
 head  prof   date      time      yearday        lat      lon     nbins  binl  btrk
    1   130  98/01/29  17:13:07  28.717442   41.4430   -70.8468    50     2     1
    2     1  98/01/30  04:06:45  29.171354   42.5045   -69.8928    50     2     1
    3   119  98/01/30  04:17:09  29.178576   42.5256   -69.8656    50     2     1

 DATA FILE NAME ../pingdata/PINGDATA.001 
 head  prof   date      time      yearday        lat      lon     nbins  binl  btrk
    1    46  98/01/30  14:12:07  29.591748   42.3308   -68.7495    50     2     1
    2   204  98/01/30  21:05:59  29.879155   42.2881   -69.1135    50     2     1

 DATA FILE NAME ../pingdata/PINGDATA.002 
 head  prof   date      time      yearday        lat      lon     nbins  binl  btrk
    1   250  98/01/31  14:05:56  30.587454   43.3162   -69.9303    50     2     1

 DATA FILE NAME ../pingdata/PINGDATA.003 
 head  prof   date      time      yearday        lat      lon     nbins  binl  btrk
    1    31  98/02/01  10:55:56  31.455509   42.4625   -69.7410    50     2     1
    2     1  98/02/01  14:20:18  31.597431   42.6963   -69.6663    50     2     1
    3   218  98/02/01  16:15:49  31.677650   42.9463   -69.5272    50     2     1

 DATA FILE NAME ../pingdata/PINGDATA.004 
 head  prof   date      time      yearday        lat      lon     nbins  binl  btrk
    1    36  98/02/02  10:25:47  32.434572   41.4705   -69.5933    50     2     1

 DATA FILE NAME ../pingdata/PINGDATA.100 
 head  prof   date      time      yearday        lat      lon     nbins  binl  btrk
    1    33  98/01/30  18:09:45  29.756771   42.0076   -68.7667    64     8     1
    2     1  98/01/30  20:58:52  29.874213   42.2712   -69.0936    64     8     1
    3    21  98/02/01  14:27:29  31.602419   42.7091   -69.6616    64     8     1