DATA FILE NAME ../pingdata/pingdata.000 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1     3  95/08/18  19:36:59  229.817350   41.5237   -70.6724   300   50     4     1
    2     1  95/08/18  20:35:03  229.857674   41.5236   -70.6721   30   50     4     1
    3    65  95/08/22  17:30:50  233.729745   41.4913   -70.6021   300   50     4     1
    4    40  95/08/22  23:02:18  233.959931   41.3619   -69.2700   300   50     4     1
    5    38  95/08/23  02:28:47  234.103322   41.1965   -68.4204   300   50     4     1
    6   102  95/08/23  05:45:17  234.239780   41.0359   -67.6349   300   50     4     1

 DATA FILE NAME ../pingdata/pingdata.001 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1    76  95/08/23  14:15:14  234.593912   40.9561   -67.6246   300   50     4     1
    2   174  95/08/23  20:49:26  234.867662   40.8544   -67.5741   300   50     4     1

 DATA FILE NAME ../pingdata/pingdata.002 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1   126  95/08/24  11:19:27  235.471840   40.8736   -67.5600   300   50     4     1
    2    21  95/08/24  22:01:21  235.917604   40.8797   -67.9374   300   50     4     1
    3    20  95/08/24  23:52:48  235.995000   40.8220   -68.2998   300   50     4     1
    4    32  95/08/25  01:39:18  236.068958   40.7520   -68.6663   300   50     4     1
    5    50  95/08/25  04:25:48  236.184583   40.6610   -69.3036   300   50     4     1

 DATA FILE NAME ../pingdata/pingdata.003 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1    75  95/08/25  08:35:45  236.358160   40.8499   -70.3060   300   50     4     1