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                
3     2        20130328        1230            20130328.1230.001   -37.996300   -44.998833    1       503.511    507.93    1     1.4213   19.4291   6.7561    0.0302   0.0315   51.2173696997995  20.7784658584056  
3     2        20130328        1230            20130328.1230.001   -37.996300   -44.998833    4       219.829    221.605   4     0.641    7.2403    2.2037    0.0418   0.0288   58.5463343725886  8.86838318309575