conductivity conductivity2 crs ctd41cp2_timestamp density density2 depth instrument_adcp instrument_ctd instrument_ctd_rbr latitude longitude m_pitch m_roll m_science_clothesline_lag platform potential_temperature potential_temperature2 pressure profile_id profile_lat profile_lon profile_time salinity salinity2 sci_m_present_time sci_water_pressure sci_water_pressure2 sound_speed sound_speed2 source_file temperature temperature2 time trajectory u v water_depth