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,[ALTITUDE|DATETIME;ALTITUDE],km,REAL,Retrieval effective altitude vector (if DATETIME independent) or matrix (if DATETIME dependent). The reporting of monotonically increasing values is recommended.,x
2,ALTITUDE.BOUNDARIES,[ALTITUDE;INDEPENDENT|DATETIME;ALTITUDE;INDEPENDENT],km,REAL,2D (if DATETIME independent) or 3D (if DATETIME dependent) matrix with on each row the lower and upper boundaries of the layers for which the partial columns are reported. In layer-based retrieval these are equal to the lower and upper boundaries of the respective retrieval layers,x
2,PRESSURE_INDEPENDENT,DATETIME;ALTITUDE,hPa,REAL,Effective air pressure at each altitude,x
2,COLUMN.PARTIAL_INDEPENDENT,DATETIME;ALTITUDE,Zmolec cm-2,REAL,Vertical profile of partial columns of air number densities (for conversion between VMR and partial column profile),x
2,COLUMN.PARTIAL_INDEPENDENT_SOURCE,[CONSTANT|DATETIME|DATETIME;ALTITUDE],[empty],STRING,Partial columns of air source (e.g. NCEP; Sonde; ECMWF etc.),x
2,INTEGRATION.TIME,DATETIME,s,REAL,Duration of the measurement corresponding to the retrieved datapoint,x if [GAS].ISO.MIXING.RATIO.VOLUME_ABSORPTION.[SOLAR|LUNAR] is provided
2,[GAS].ISO.MIXING.RATIO.VOLUME_ABSORPTION.[SOLAR|LUNAR],DATETIME;CROSSCORRELATE.N;ALTITUDE,[ppmv|ppbv|pptv],REAL,Retrieved target vertical profile in VMR units,o
2,[GAS].ISO.MIXING.RATIO.VOLUME_ABSORPTION.[SOLAR|LUNAR]_APRIORI,DATETIME;CROSSCORRELATE.N;ALTITUDE,[ppmv|ppbv|pptv],REAL,A-priori target vertical profile in VMR units,x if [GAS].ISO.MIXING.RATIO.VOLUME_ABSORPTION.[SOLAR|LUNAR] is provided
2,[GAS].ISO.MIXING.RATIO.VOLUME_ABSORPTION.[SOLAR|LUNAR]_AVK,DATETIME;CROSSCORRELATE.N;ALTITUDE;CROSSCORRELATE.N;ALTITUDE,1,REAL,A or Averaging kernel matrix for retrieved target profile (expressed in VMR/VMR units; the last ALTITUDE dimension (the fastest running) is the kernel dimension or the column dimension of the AVK matrix),x if [GAS].ISO.MIXING.RATIO.VOLUME_ABSORPTION.[SOLAR|LUNAR] is provided
2,[GAS].ISO.MIXING.RATIO.VOLUME_ABSORPTION.[SOLAR|LUNAR]_UNCERTAINTY.RANDOM.COVARIANCE,DATETIME;CROSSCORRELATE.N;ALTITUDE;CROSSCORRELATE.N;ALTITUDE,[ppmv2|ppbv2|pptv2],REAL,Total random error covariance matrix associated with the retrieved vertical profile (expressed in same units as the profile) (without smoothing error!),x if [GAS].ISO.MIXING.RATIO.VOLUME_ABSORPTION.[SOLAR|LUNAR] is provided
2,[GAS].ISO.MIXING.RATIO.VOLUME_ABSORPTION.[SOLAR|LUNAR]_UNCERTAINTY.SYSTEMATIC.COVARIANCE,DATETIME;CROSSCORRELATE.N;ALTITUDE;CROSSCORRELATE.N;ALTITUDE,[ppmv2|ppbv2|pptv2],REAL,Total systematic error covariance matrix associated with the retrieved vertical profile (expressed in same units as the profile),x if [GAS].ISO.MIXING.RATIO.VOLUME_ABSORPTION.[SOLAR|LUNAR] is provided
2,[GAS].ISO.COLUMN.PARTIAL_ABSORPTION.[SOLAR|LUNAR],DATETIME;CROSSCORRELATE.N;ALTITUDE,molec cm-2 (or a unit scaled by 1E3*n ex. Pmolec cm-2),REAL,Vertical profile of partial columns per layer,x if [GAS].ISO.MIXING.RATIO.VOLUME_ABSORPTION.[SOLAR|LUNAR] is provided
2,[GAS].ISO.COLUMN.PARTIAL_ABSORPTION.[SOLAR|LUNAR]_APRIORI,DATETIME;CROSSCORRELATE.N;ALTITUDE,molec cm-2 (or a unit scaled by 1E3*n ex. Pmolec cm-2),REAL,Vertical profile of a-priori partial columns per layer,x
2,[GAS].ISO.COLUMN_ABSORPTION.[SOLAR|LUNAR],DATETIME;CROSSCORRELATE.N,molec cm-2 (or a unit scaled by 1E3*n ex. Pmolec cm-2),REAL,Total vertical column of target gas,x
2,[GAS].ISO.COLUMN_ABSORPTION.[SOLAR|LUNAR]_AVK,DATETIME;CROSSCORRELATE.N;CROSSCORRELATE.N;ALTITUDE,1,REAL,Averaging kernel matrix associated with the total vertical column of the target gas (in molec cm-2/molec cm-2 units),x
2,[GAS].ISO.COLUMN_ABSORPTION.[SOLAR|LUNAR]_UNCERTAINTY.RANDOM.STANDARD,DATETIME;CROSSCORRELATE.N;CROSSCORRELATE.N,molec cm-2 (or a unit scaled by 1E3*n ex. Pmolec cm-2),REAL,Total random uncertainty on the retrieved total column (expressed in same units as the column) (without smoothing error),x
2,[GAS].ISO.COLUMN_ABSORPTION.[SOLAR|LUNAR]_UNCERTAINTY.SYSTEMATIC.STANDARD,DATETIME;CROSSCORRELATE.N;CROSSCORRELATE.N,molec cm-2 (or a unit scaled by 1E3*n ex. Pmolec cm-2),REAL,Total systematic uncertainty on the retrieved partial columns (expressed in same units as the column),x
2,ANGLE.[SOLAR|LUNAR]_ZENITH.ASTRONOMICAL,DATETIME,deg,REAL,The solar (or lunar) astronomical zenith angle at which the measurement was taken,x
2,ANGLE.[SOLAR|LUNAR]_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|LUNAR]_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,LATITUDE,DATETIME;ALTITUDE,deg,REAL,Meas. Geolocation; latitude (decimal degrees) along the line of sight of the measurement (+ for north; - for south),o
2,LONGITUDE,DATETIME;ALTITUDE,deg,REAL,Meas. geolocation; longitude (decimal degrees) along the line of sight of the measurement (+ for east; - for west),o
2,H2O.MIXING.RATIO.VOLUME_ABSORPTION.[SOLAR|LUNAR],DATETIME;ALTITUDE,[ppmv|ppbv|pptv],REAL,Vertical profile of H2O adopted in the target gas retrieval in VMR units,x
2,H2O.COLUMN_ABSORPTION.[SOLAR|LUNAR],DATETIME,molec cm-2 (or a unit scaled by 1E3*n ex. Pmolec cm-2),REAL,Total vertical column of H2O adopted in the target gas retrieval,x
2,SOURCE.PRODUCT,INDEPENDENT,[empty],STRING,Information relevant to the source history of the Metadata and Data,o
