cast  station  date_start_utc  time_start_utc  event_start         lat_start    lon_start     niskin  depth      press     bots  PO4      NO3_NO2   silicate  NO2      NH4      NPOC              TN                
2     2        20130327        1609            20130327.1609.001   -37.997297   -45.000042    10      5108.562   5209.693  10    2.4173   33.3321   126.0667  0.0498   0.021    47.0434199699028  37.3235933506765  
2     2        20130327        1609            20130327.1609.001   -37.997297   -45.000042    11      4001.029   4069.818  11    2.1939   30.1202   91.6798   0.0406   0.0196   46.5278144150332  33.0072549179894  
2     2        20130327        1609            20130327.1609.001   -37.997297   -45.000042    12      3002.155   3046.643  12    1.9267   26.3843   60.5519   0.0363   0.0283   46.202491862556   28.2392066493235  
2     2        20130327        1609            20130327.1609.001   -37.997297   -45.000042    23      2501.794   2535.868  23    1.7849   25.5304   50.0437   0.0271   0.0169   44.6004317456398  27.4361669409166