DATA FILE NAME ../pingdata/PINGDATA.000 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1     8  99/03/18  00:14:52  76.010324   41.2877   -68.5598   300   50     4     1
    2    44  99/03/18  01:00:56  76.042315   41.2627   -68.3770   300   50     4     1
    3   198  99/03/18  04:47:00  76.199306   41.1244   -67.3862   300   50     4     1

 DATA FILE NAME ../pingdata/PINGDATA.001 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1    50  99/03/18  21:17:00  76.886806   41.0963   -67.2753   300   50     4     1
    2    20  99/03/19  01:33:06  77.064653   41.1753   -67.3484   300   50     4     1
    3   180  99/03/19  03:19:11  77.138322   41.1710   -67.3078   300   50     4     1

 DATA FILE NAME ../pingdata/PINGDATA.002 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1   250  99/03/19  18:19:12  77.763333   41.1422   -67.2893   300   50     4     1

 DATA FILE NAME ../pingdata/PINGDATA.003 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1   250  99/03/20  15:09:12  78.631389   41.0375   -67.2465   300   50     4     1

 DATA FILE NAME ../pingdata/PINGDATA.004 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1   180  99/03/21  11:59:12  79.499444   41.0275   -67.2797   300   50     4     1
    2    70  99/03/22  03:05:17  80.128669   40.6439   -66.9633   300   50     8     0

 DATA FILE NAME ../pingdata/PINGDATA.005 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1   250  99/03/22  08:55:17  80.371725   40.4386   -66.7025   300   50     8     0

 DATA FILE NAME ../pingdata/PINGDATA.006 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1   116  99/03/23  05:45:16  81.239769   40.3367   -66.6701   300   50     8     0
    2   134  99/03/23  15:31:22  81.646782   40.6921   -67.0088   300   50     4     1

 DATA FILE NAME ../pingdata/PINGDATA.007 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1    24  99/03/24  02:41:22  82.112060   41.1007   -67.3225   300   50     4     1
    2     5  99/03/24  04:47:27  82.199618   41.1929   -67.2979   300   50     4     1
    3   221  99/03/24  05:18:31  82.221192   41.1618   -67.2618   300   50     4     1

 DATA FILE NAME ../pingdata/PINGDATA.008 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1    10  99/03/24  23:43:32  82.988565   41.0194   -67.5419   300   50     4     1
    2    38  99/03/25  00:39:37  83.027512   41.0463   -67.7623   300   50     4     1
    3    48  99/03/25  03:55:41  83.163669   41.2066   -68.5333   300   50     4     1
    4    50  99/03/25  08:01:46  83.334560   41.3795   -69.3732   300   50     4     1