2,DATETIME,DATETIME,MJD2K,DOUBLE,Mean time of the measurement sequence used for each retrieval
2,DATETIME.START,DATETIME,MJD2K,DOUBLE,Start time of the measurement sequence used for each retrieval
2,DATETIME.STOP,DATETIME,MJD2K,DOUBLE,End time of the measurement sequence used for each retrieval
2,DATETIME,DATETIME,MJD2K,DOUBLE,Mean time of the measurement sequence used for each retrieval; defined relative to reference datetime of Jan. 1 2000 at 0:00:00 UT which is equal to 0.00,x
2,DATETIME.START,DATETIME,MJD2K,DOUBLE,Start time of the measurement sequence used for each retrieval; defined relative to reference datetime of Jan. 1 2000 at 0:00:00 UT which is equal to 0.00,x
2,DATETIME.STOP,DATETIME,MJD2K,DOUBLE,End time of the measurement sequence used for each retrieval; defined relative to reference datetime of Jan. 1 2000 at 0:00:00 UT which is equal to 0.00,x
2,INTEGRATION.TIME,DATETIME,s,REAL,Duration of the MAXDOAS measurements corresponding to the retrieved profile,x
2,LATITUDE.INSTRUMENT,CONSTANT,deg,REAL,Inst. Geolocation; latitude north (decimal degrees) of the location of the instrument (+ for north; - for south),x
2,LONGITUDE.INSTRUMENT,CONSTANT,deg,REAL,Inst. geolocation east (decimal degrees) of the location of the instrument (+ for east; - for west),x
2,ALTITUDE.INSTRUMENT,CONSTANT,m,REAL,Inst. geolocation; altitude of the instrument relative to the location site,x
2,WAVELENGTH,[CONSTANT|WAVELENGTH],nm,REAL,Wavelength (Can be a vector if retrieval is made at different wavelengths. Then all retrieved variables have an additional wavelength dependence.),x
2,WIND.DIRECTION.SURFACE_INDEPENDENT,DATETIME,deg,REAL,Wind direction at the station using WMO definition (wind from the north is 360
2,WIND.DIRECTION.SURFACE_INDEPENDENT_SOURCE,[CONSTANT|DATETIME],[empty],STRING,Wind direction source (e.g. Anemometer
2,ALTITUDE,[ALTITUDE|DATETIME;ALTITUDE],km,REAL,Retrieval effective altitude vector - possibly also dependent on DATETIME - in which case it becomes a 2D matrix,x
2,PRESSURE_INDEPENDENT,DATETIME;ALTITUDE,hPa,REAL,Effective air pressure at each altitude,x
2,ALTITUDE.BOUNDARIES,[ALTITUDE;INDEPENDENT|DATETIME;ALTITUDE;INDEPENDENT],km,REAL,2D matrix with on each row the lower and upper boundaries of the layers for which the partial columns are provided. In layer-based retrieval these are equal to the lower and upper boundaries of the respective retrieval layers. This matrix becomes 3D if the ALTITUDE.BOUNDARIES varies with DATETIME,x
2,WIND.DIRECTION.SURFACE_INDEPENDENT,DATETIME,deg,REAL,Wind direction at the station using WMO definition (wind from the north is 360; from the east is 90 and so on. No wind (calm) is 0),o
2,WIND.DIRECTION.SURFACE_INDEPENDENT_SOURCE,[CONSTANT|DATETIME],[empty],STRING,Wind direction source (e.g. Anemometer; ECMWF etc.),x if WIND.DIRECTION.SURFACE_INDEPENDENT reported
2,WIND.SPEED.SURFACE_INDEPENDENT,DATETIME,m s-1,REAL,Wind speed at the station,o
2,WIND.SPEED.SURFACE_INDEPENDENT_SOURCE,[CONSTANT|DATETIME],[empty],STRING,Wind speed source (e.g. Anemometer; ECMWF etc.),x if WIND.SPEED.SURFACE_INDEPENDENT reported
2,ANGLE.SOLAR_ZENITH.ASTRONOMICAL,DATETIME,deg,REAL,The solar astronomical zenith angle at which the measurement was taken,x
2,ANGLE.SOLAR_AZIMUTH,DATETIME,deg,REAL,The solar azimuth angle at which the measurement was taken using north as the reference plane and increasing clockwise (0 for north
2,ANGLE.VIEW_AZIMUTH,DATETIME,deg,REAL,The azimuth viewing direction of the instrument using north as the reference plane and increasing clockwise (0 for north
2,ANGLE.SOLAR_AZIMUTH,DATETIME,deg,REAL,The solar azimuth angle at which the measurement was taken using north as the reference plane and increasing clockwise (0 for north; 90 for east and so on),x
2,ANGLE.VIEW_AZIMUTH,DATETIME,deg,REAL,The azimuth viewing direction of the instrument using north as the reference plane and increasing clockwise (0 for north; 90 for east and so on),x
2,ANGLE.VIEW_ZENITH,DATETIME,deg,REAL,The zenith viewing direction of the instrument,x
4,SOURCE.PRODUCT,INDEPENDENT,[empty],STRING,Information relevant to the source history of the Metadata and Data,o
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2,LATITUDE,DATETIME;ALTITUDE,deg,REAL,The latitude of the effective air mass at each altitude (+ for north; - for south),o
2,LONGITUDE,DATETIME;ALTITUDE,deg,REAL,The longitude of the effective air mass at each altitude (+ for east; - for west),o
2,CLOUD.CONDITIONS,DATETIME,[empty],STRING,Possible Values: clear-sky; thin clouds; thick clouds; broken clouds; [empty]. [empty] means that the cloud retrieval is not successful; not possible or missing,x
2,AEROSOL.SINGLE.SCATTERING.ALBEDO_INDEPENDENT,[DATETIME|DATETIME;WAVELENGTH],1,REAL,The aerosol single scattering albedo used for the retrievals,o
2,AEROSOL.ASYMMETRY.FACTOR_INDEPENDENT,[DATETIME|DATETIME;WAVELENGTH],1,REAL,The aerosol asymmetry factor of the phase function used for the retrievals,o
2,AEROSOL.EXTINCTION.COEFFICIENT_SCATTER.SOLAR.OFFAXIS_UNCERTAINTY.RANDOM.COVARIANCE,[DATETIME;ALTITUDE;ALTITUDE|DATETIME;WAVELENGTH;ALTITUDE;ALTITUDE],km-2,REAL,Total random error covariance matrix associated with the retrieved aerosol extinction vertical profile (without smoothing error!),x
2,AEROSOL.EXTINCTION.COEFFICIENT_SCATTER.SOLAR.OFFAXIS_UNCERTAINTY.SYSTEMATIC.COVARIANCE,[DATETIME;ALTITUDE;ALTITUDE|DATETIME;WAVELENGTH;ALTITUDE;ALTITUDE],km-2,REAL,Total systematic error covariance matrix associated with the retrieved vertical profile (expressed in same units as the profile),x
2,AEROSOL.EXTINCTION.COEFFICIENT_SCATTER.SOLAR.OFFAXIS_AVK,[DATETIME;ALTITUDE;ALTITUDE|DATETIME;WAVELENGTH;ALTITUDE;ALTITUDE],1,REAL,A or Averaging kernel matrix for retrieved target profile. The fastest running index corresponds to the column index of the AVK transformation matrix,o
2,AEROSOL.EXTINCTION.COEFFICIENT_SCATTER.SOLAR.OFFAXIS_APRIORI,[DATETIME;ALTITUDE|DATETIME;WAVELENGTH;ALTITUDE],km-1,REAL,A-priori target vertical profile,x if AEROSOL.EXTINCTION.COEFFICIENT_SCATTER.SOLAR.OFFAXIS_AVK reported
2,AEROSOL.OPTICAL.DEPTH.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS,[DATETIME|DATETIME;WAVELENGTH],1,REAL,The total tropospheric aerosol optical depth retrieved from the measurements.,x
2,AEROSOL.OPTICAL.DEPTH.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS_UNCERTAINTY.RANDOM.STANDARD,[DATETIME|DATETIME;WAVELENGTH],1,REAL,Total random uncertainty on the retrieved total tropospheric aerosol optical depth (expressed in same units as the column) (without smoothing error),x
2,AEROSOL.OPTICAL.DEPTH.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS_UNCERTAINTY.SYSTEMATIC.STANDARD,[DATETIME|DATETIME;WAVELENGTH],1,REAL,Total systematic uncertainty on the retrieved total tropospheric aerosol optical depth (expressed in same units as the column) (without smoothing error),x
2,AEROSOL.OPTICAL.DEPTH.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS_AVK,[DATETIME;ALTITUDE|DATETIME;WAVELENGTH;ALTITUDE],1,REAL,Averaging kernel matrix associated with the total tropospheric aerosol optical depth,o
2,AEROSOL.OPTICAL.DEPTH.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS_APRIORI,[DATETIME|DATETIME;WAVELENGTH],1,REAL,A-priori total tropospheric aerosol optical depth,x if AEROSOL.OPTICAL.DEPTH.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS_AVK reported
4,SOURCE.PRODUCT,INDEPENDENT,[empty],STRING,Information relevant to the source history of the Metadata and Data,o
