DATA FILE NAME ../pingdata/pingdata.000 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1    40  95/01/29  15:45:17  28.656447   41.4096   -71.3505   300   50     4     1
    2     1  95/01/30  23:20:19  29.972442   41.3091   -68.8371   300   50     4     1
    3    24  95/01/30  23:31:46  29.980394   41.3067   -68.7976   300   50     4     1
    4    62  95/01/31  01:38:17  30.068252   41.2471   -68.3814   300   50     4     1
    5   122  95/01/31  06:54:43  30.287998   41.0391   -67.6870   300   50     4     1

 DATA FILE NAME ../pingdata/pingdata.001 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1   202  95/01/31  17:04:41  30.711586   40.8646   -67.5533   300   50     4     1
    2    48  95/02/01  10:01:15  31.417535   41.1669   -67.4769   300   50     4     1

 DATA FILE NAME ../pingdata/pingdata.002 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1    23  95/02/01  14:01:12  31.584167   41.2566   -67.4688   300   50     4     1
    2   134  95/02/01  16:02:42  31.668542   41.1143   -67.3956   300   50     4     1
    3    32  95/02/02  03:19:10  32.138310   40.9208   -68.0958   300   50     4     1
    4    46  95/02/02  06:05:37  32.253900   41.0945   -68.6180   300   50     4     1
    5    14  95/02/02  10:02:05  32.418113   41.3388   -69.3454   300   50     4     1

 DATA FILE NAME ../pingdata/pingdata.003 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1    63  95/02/02  11:12:02  32.466690   41.4055   -69.5398   300   50     4     1
    2     5  95/02/03  00:50:52  33.035324  99999996802856925000000000000000000000.0000  99999996802856925000000000000000000000.0000   300   50     4     1
    3    37  95/02/03  01:15:52  33.052685  99999996802856925000000000000000000000.0000  99999996802856925000000000000000000000.0000   300   50     4     1
    4   145  95/02/03  13:34:52  33.565880  99999996802856925000000000000000000000.0000  99999996802856925000000000000000000000.0000   300   50     4     1

 DATA FILE NAME ../pingdata/pingdata.004 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1   137  95/02/04  01:39:51  34.069340  99999996802856925000000000000000000000.0000  99999996802856925000000000000000000000.0000   300   50     4     1
    2    93  95/02/06  13:37:54  36.567986  99999996802856925000000000000000000000.0000  99999996802856925000000000000000000000.0000   300   50     4     1
    3    20  95/02/06  21:31:43  36.897025  99999996802856925000000000000000000000.0000  99999996802856925000000000000000000000.0000   300   50     4     1