beta_700nm cdom chlorophyll_a conductivity crs ctd41cp_timestamp density depth instrument_ctd instrument_flbbcdslc instrument_optode latitude longitude optode_water_temperature oxygen_concentration oxygen_saturation platform potential_temperature pressure profile_id profile_lat profile_lon profile_time salinity sci_oxy3835_wphase_dphase science_timestamp sound_speed source_file temperature time trajectory u v vehicle_pitch vehicle_roll water_depth