{"ctd_t": ["dpi_TEMPWAT_L1", "dpi_TEMPSRF_L1"], "di": "CC_di", "frame_type": "PD311", "cal_temp": "CC_cal_temp", "wl": "CC_wl", "eswa": "CC_eswa", "data_in": "PD332", "wllower": "CC_lower_wavelength_limit_for_spectra_fit", "wlupper": "CC_upper_wavelength_limit_for_spectra_fit", "eno3": "CC_eno3", "ctd_sp": ["dpi_PRACSAL_L2", "dpi_SALSURF_L2"], "dark_value": ["PD330", "PD2325"]}
Temperature and salinity corrected dissolved nitrate concentration.