DATA FILE NAME ../pingdata/PINGDATA.013 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1    83  98/04/27  04:28:37  116.186539   41.8341   -69.3933   300   50     2     1
    2     1  98/04/27  19:34:43  116.815775   41.5235   -70.6717   300   50     2     1
    3     1  98/05/02  14:27:35  121.602488  99999996802856925000000000000000000000.0000  99999996802856925000000000000000000000.0000   300   50     2     1
    4   165  98/05/02  14:34:01  121.606956   41.4371   -70.7802   300   50     2     1

 DATA FILE NAME ../pingdata/PINGDATA.014 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1   250  98/05/03  04:18:58  122.179838   42.7942   -69.6021   300   50     2     1

 DATA FILE NAME ../pingdata/PINGDATA.015 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1   250  98/05/04  01:08:59  123.047905   43.3538   -70.1358   300   50     2     1

 DATA FILE NAME ../pingdata/PINGDATA.016 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1   250  98/05/04  21:58:59  123.915961   42.1843   -69.3794   300   50     2     1

 DATA FILE NAME ../pingdata/PINGDATA.017 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1   250  98/05/05  18:48:59  124.784016   42.5029   -68.7611   300   50     2     1

 DATA FILE NAME ../pingdata/PINGDATA.018 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1    57  98/05/06  15:38:58  125.652060   41.1883   -68.3831   300   50     2     1