DATA FILE NAME ../pingdata/pingdata.000 
 head  prof   date      time      yearday        lat      lon      dt   nbins  binl  btrk
    1     2  97/10/08  23:30:43  280.979664   41.4829   -70.6973   300   50     4     1
    2     2  97/10/09  00:48:12  281.033472   41.4333   -70.7949   300   50     4     1
    3     3  97/10/09  00:58:09  281.040382   41.4299   -70.8032   300   50     4     1
    4     1  97/10/09  13:36:10  281.566782   41.7642   -68.4810   300   50     4     1
    5    45  97/10/09  13:49:28  281.576019   41.7889   -68.4354   300   50     4     1
    6     1  97/10/17  11:16:15  289.469618   41.4326   -69.9704   300   50     4     1
    7    45  97/10/17  11:29:46  289.479005   41.4388   -70.0101   300   50     4     1
    8   108  97/10/21  22:26:37  293.935150   41.3673   -70.8850   300   50     4     1
    9    42  97/10/22  07:35:15  294.316146   40.6668   -69.1909   300   50     4     1