core       month  day  year  shipfix_lat  shipfix_lon  subfix_lat  subfix_lon  depth_target  cruise_id  
4483-2     12     06   2008  27.0065      -111.4093    none        none        2004          AT15-40    
4483-3     12     06   2008  27.0065      -111.4093    none        none        2004          AT15-40    
4483-10    12     06   2008  27.0065      -111.4093    none        none        2004          AT15-40    
4483-17    12     06   2008  27.0065      -111.4093    none        none        2004          AT15-40    
4483-23    12     06   2008  27.0065      -111.4093    none        none        2004          AT15-40    
4483-24    12     06   2008  27.0065      -111.4093    none        none        2004          AT15-40    
4486-14    12     09   2008  27.0077      -111.4085    27.0077     -111.4088   2010          AT15-40    
4486-19    12     09   2008  27.0077      -111.4085    27.0077     -111.4088   2010          AT15-40    
4486-24    12     09   2008  27.0077      -111.4085    27.0077     -111.4088   2010          AT15-40    
4488-9     12     12   2008  27.0077      -111.4085    27.0077     -111.4088   2010          AT15-40    
4488-10    12     12   2008  27.0077      -111.4085    27.0077     -111.4088   2010          AT15-40    
4489-11    12     13   2008  27.0077      -111.4085    27.0077     -111.4088   2010          AT15-40    
4489-26    12     13   2008  27.0077      -111.4085    27.0077     -111.4088   2010          AT15-40    
4489-28    12     13   2008  27.0077      -111.4085    27.0077     -111.4088   2010          AT15-40    
4490-10    12     14   2008  27.0077      -111.4085    27.0077     -111.4088   2010          AT15-40    
4490-12    12     14   2008  27.0077      -111.4085    27.0077     -111.4088   2010          AT15-40    
4490-25    12     14   2008  27.0077      -111.4085    27.0077     -111.4088   2010          AT15-40    
4490-26    12     14   2008  27.0077      -111.4085    27.0077     -111.4088   2010          AT15-40    
4490-27    12     14   2008  27.0077      -111.4085    27.0077     -111.4088   2010          AT15-40    
4491-12    12     15   2008  27.0071      -111.4080    27.0071     -111.4082   2005          AT15-40