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DOCUMENTATION/ GEOMS DATA REPORTING/ UVVIS

UV/Vis Differential Optical Absorption Spectroscopy (DOAS) template description


Document history


Version Date Comments
007 December 01, 2021 GEOMS UVVIS.DOAS templates
006 May 27, 2014 GEOMS UVVIS.DOAS Direct Sun Gas template 006
006 May 27, 2014 GEOMS UVVIS.DOAS Zenith Gas template 006
006 May 27, 2014 GEOMS UVVIS.DOAS Off-axis Gas template 006
006 May 27, 2014 GEOMS UVVIS.DOAS Off-axis Aerosol template 006
005 February 27, 2014 GEOMS UVVIS.DOAS Direct Sun Gas template 005
004 December 19, 2013 GEOMS UVVIS.DOAS Direct Sun Gas template 004
004 December 19, 2013 GEOMS UVVIS.DOAS Zenith Gas template 004
004 December 19, 2013 GEOMS UVVIS.DOAS Off-axis Gas template 004
004 December 19, 2013 GEOMS UVVIS.DOAS Off-axis Aerosol template 004
003 July 18, 2013 GEOMS UVVIS.DOAS Gas template 003
003 July 18, 2013 GEOMS UVVIS.DOAS Aerosol template 003
002 January 25, 2013 GEOMS UVVIS.DOAS Gas template 002
002 January 25, 2013 GEOMS UVVIS.DOAS Aerosol template 002
001 September 5, 2012 GEOMS UVVIS.DOAS Gas template 001
001 September 5, 2012 GEOMS UVVIS.DOAS Aerosol template 001

Authors


François Hendrick (1), Ian Boyd (2), Katrijn Clémer (1,*), Bavo Langerock (1), Christian Retscher (3,**), Martine De Mazière (1), and Michel Van Roozendael (1)

1 Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels, Belgium
2 University of Massachusetts, USA
3 NASA/GSFC, Greenbelt, USA
* now at Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Leuven, Belgium
** now at EUMETSAT, Darmstadt, Germany

E-mail: franch [at] oma.be (François Hendrick)

Overview


This document describes the GEOMS-compliant templates for UV-Vis data reporting. A different template has been created for each type of DOAS measurement, i.e. zenith DOAS, MAXDOAS, and direct-sun measurements.

Template descriptions

  • Instrument Naming
    • The instrument names of the DOAS systems are based on the viewing geometry (zenith, off-axis, direct-sun) and the primary measured entity (gas or aerosol): UVVIS.DOAS.ZENITH.[GAS], UVVIS.DOAS.OFFAXIS.[GAS], UVVIS.DOAS.DIRECTSUN.[GAS] and UVVIS.DOAS.OFFAXIS.AEROSOL.

  • Measurement modes
    • To express the different viewing geometries possible for a DOAS-type instrument, three different modes were created: SCATTER.SOLAR.ZENITH, SCATTER.SOLAR.OFFAXIS, and ABSORPTION.SOLAR. The additional mode INDEPENDENT can be used to report variables that are derived from climatology, models, or auxiliary measurements.

  • Variable Reporting
    • Each combination of primary measured entity and measurement mode has its own metadata reporting template.

    • Variable Attributes Templates for [GAS] from DOAS, MAXDOAS, and direct-sun measurements
      • link to the [GAS] templates at Templates and Examples.

    • Variable Attributes Template for tropospheric aerosol from MAXDOAS off-axis measurements
      • link to the AEROSOL template at Templates and Examples.

    • Examples - Global attributes
      • These variables are user and project specific. Link to an example BIRA-IASB Global Attribute listing at Templates and Examples.


      Generic metadata template files can be downloaded at Generic Metadata Template Files. These can be edited, as described in the files, to create a metadata template file for a particular Instrument, Location and set of Originator attributes.

Creating the HDF file

Here we will show examples of how an HDF datafile can be created. For this purpose two MATLAB files (MAT2HDF_In.m and MAT2HDF_Out_AVDC.m) and one IDL executable are used. If you have no access to MATLAB you can use other software to create your ASCII files. To execute the MATLAB file, the user needs a MATLAB license. The MATLAB codes will generate the ASCII files needed to create the HDF file using idlcr8hdf. We would like to be informed about possible improvements or other feedback concerning the routines.

The IDL program, idlcr8hdf, can be run as a stand alone program using, for example, the free IDL Virtual Machine (idlcr8hdf.sav), OR as part of another program; in a batch file or shell script; or in the IDL run-time environment using a licensed version of IDL, or IDL operated in DEMO mode (idlcr8hdf.pro). Please contact Ian Boyd (iboyd [at] astro.umass.edu) for help with setting up idlcr8hdf. Instructions for downloading IDL can be found on the exelisvis web-site. The IDL routines can be found at the AVDC data conversion site. All MATLAB routines and sample files are provided by François Hendrick (franch [at] oma.be) and made available here in section Sample files and MATLAB programs.

    Creating the ASCII files in matlab
    [struc]=MAT2HDF_In(Inputfile, mode) This function reads files containing a MAT2HDF configuration and stores the configuration information in a structure that can then be used in the MAT2HDF_Out function to create the files that are needed by idlcr8hdf to make the HDF files. This function only reads a predefined configuration file. The user can modify the configuration file to fit his/her application. This file must contain all variables needed and all the attributes. Note that VALUES is the name of the corresponding variable in your MATLAB workspace. Example input files for MAXDOAS NO2 and aerosol and ZENITH NO2 measurements are Sample files and MATLAB programs given below (‘Input_UVVIS_OFFAXIS_NO2_BIRA.txt’, ‘Input_UVVIS_OFFAXIS_AERO_BIRA.txt’, and ‘Input_UVVIS_ZENITH_O3.txt’). In those cases, mode='-text'.

    MAT2HDF_Out_AVDC(struc, data file, metadata file) creates the metadata and data files that are needed by idlcr8hdf to create a HDF file. This function uses the structure created by MAT2HDF_In.

    Creating the hdf files
    idlcr8hdf can be used to generate one or more HDF files in a single call. Please use v4.0b35 or higher. Set-up a metadata template file for your location and instrument, leaving empty spaces for any values that idlcr8hdf can auto-fill (as indicated in the Generic Metadata Template files). After successfully creating one or more formatted ASCII data files, you should run idlcr8hdf to create the HDF file(s), based on the Metadata Template file (example files are ‘MetaDatafile_NO2_OFFAXIS.txt’,’ MetaDatafile_AERO_OFFAXIS.txt’, and ‘MetaDatafile_O3_ZENITH.txt’), data file (example files are ‘Datafile_NO2_OFFAXIS.txt’, ‘Datafile_AERO_OFFAXIS.txt’ and ‘Datafile_O3_ZENITH.txt’), and the latest TAV, which contains all variables that are allowed in GEOMS. If your Institute or the place of the measurements is not yet listed you need to arrange to have it added to the file. The resulting HDF4 file obtained from the sample inputs is also shown below. The resulting HDF4 file obtained from the sample inputs are also given below. Here is also an example of Unix/Linux command line for creating HDF files in a folder called 'hdf_files/’ using the idlcr8hdf routine:

    idlcr8hdf,'MetaDatafile_NO2_OFFAXIS.txt','Datafile_NO2_OFFAXIS.txt','tableattrvalue_04R017_idl.dat','hdf_files/' | idl

Generic metadata template files for HDF file generation


1 GEOMS-GEN-UVVIS-DOAS-OFFAXIS-AEROSOL Generic metadata template file for aerosols.
2 GEOMS-GEN-UVVIS-DOAS-DIRECTSUN-GAS Generic metadata template file for direct sun gas.
3 GEOMS-GEN-UVVIS-DOAS-OFFAXIS-GAS Generic metadata template file for off-axis gas.
4 GEOMS-GEN-UVVIS-DOAS-ZENITH-GAS Generic metadata template file for zenith gas.

Sample files and MATLAB programs


MATLAB Routines
MAT2HDF_In.m
MAT2HDF_Out_AVDC.m
Example Input Files
Input_UVVIS_OFFAXIS_NO2_BIRA.txt
Input_UVVIS_OFFAXIS_AERO_BIRA.txt
Input_UVVIS_ZENITH_O3.txt
Example Metadata and Data ASCII files
MetaDatafile_NO2_OFFAXIS.txt
MetaDatafile_AERO_OFFAXIS.txt
MetaDatafile_O3_ZENITH.txt
Datafile_NO2_OFFAXIS.txt
Datafile_AERO_OFFAXIS.txt
Datafile_O3_ZENITH.txt
Resulting hdf files
groundbased_uvvis.doas.offaxis.no2_bira.iasb007_xianghe_20150626t212455z_20150627t104617z_004.hdf
groundbased_uvvis.doas.offaxis.aerosol_bira.iasb007_xianghe_20150626t212455z_20150627t104617z_004.hdf
groundbased_uvvis.doas.zenith.o3_bira.iasb002_jungfraujoch_20150920t051015z_20150920t173243z_007.hdf

Templates and examples


1 GEOMS-TE-RO-VA   Radio Occulation (RO) attribute entries
2 GEOMS-TE-UVVIS-DOAS-DS   UVVIS DOAS Data sources
3 GEOMS-TE-UVVIS-DOAS-VARMODE   UVVIS DOAS Variable modes
4 GEOMS-TE-UVVIS-DOAS-DIRECTSUN-GAS-VA   UVVIS Variable Attributes Template for [GAS] from direct-sun measurements
5 GEOMS-TE-UVVIS-DOAS-OFFAXIS-GAS-VA   UVVIS Variable Attributes Template for [GAS] from MAXDOAS measurements
6 GEOMS-TE-UVVIS-DOAS-ZENITH-GAS-VA   UVVIS Variable Attributes Template for [GAS] from DOAS measurements
7 GEOMS-TE-UVVIS-DOAS-OFFAXIS-AEROSOL-VA   UVVIS Variable Attributes Template for tropospheric aerosol from MAXDOAS off-axis measurements

 GEOMS-TE-RO-VA (Radio Occulation (RO) attribute entries)
Download in CSV format GEOMS-TE-RO-VA.csv (last updated: December 01, 2021).
#VariablesDependencies/DimensionsUnitsData typeCommentReq
0 DATETIME DATETIME MJD2K DOUBLE Mean meas. time x
1 LATITUDE LATITUDE deg DOUBLE Mean latitude (+ for north; - for south) x
2 LONGITUDE LONGITUDE deg DOUBLE Mean longitude (+ for east; - for west) x
3 ALTITUDE ALTITUDE m DOUBLE Mean altitude x
4 TEMPERATURE DATETIME;LONGITUDE;LATITUDE;ALTITUDE K REAL x
5 TEMPERATURE.DRY DATETIME;LONGITUDE;LATITUDE;ALTITUDE K REAL x
6 PRESSURE DATETIME;LONGITUDE;LATITUDE;ALTITUDE Pa REAL x
7 PRESSURE.DRY DATETIME;LONGITUDE;LATITUDE;ALTITUDE Pa REAL x
8 HUMIDITY.SPECIFIC DATETIME;LONGITUDE;LATITUDE;ALTITUDE kg kg-1 REAL x
9 DENSITY DATETIME;LONGITUDE;LATITUDE;ALTITUDE kg m-3 REAL o
10 DENSITY.DRY DATETIME;LONGITUDE;LATITUDE;ALTITUDE kg m-3 REAL o
11 FREQUENCY.SIGNAL INDEPENDENT s-1 DOUBLE o
12 REFRACTIVITY DATETIME;LONGITUDE;LATITUDE;ALTITUDE 1 REAL o
13 ABSORPTION.COEFFICIENT DATETIME;LONGITUDE;LATITUDE;ALTITUDE m-1 REAL o
14 SOURCE.PRODUCT INDEPENDENT
 [empty] STRING Information relevant to the source history of the Metadata and Data o
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 GEOMS-TE-UVVIS-DOAS-DS (UVVIS DOAS Data sources)
ERROR_SQL=select show, datasource, description from datasource where datasource like '%UVVIS.DOAS%' and show != '0' ORDER BY datasource;N/A
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 GEOMS-TE-UVVIS-DOAS-VARMODE (UVVIS DOAS Variable modes)
N/A
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 GEOMS-TE-UVVIS-DOAS-DIRECTSUN-GAS-VA (UVVIS Variable Attributes Template for [GAS] from direct-sun measurements)
Download in CSV format GEOMS-TE-UVVIS-DOAS-DIRECTSUN-GAS-VA.csv (last updated: December 01, 2021).
#VariablesDependencies/DimensionsUnitsData typeCommentReq
0 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
1 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
3 INTEGRATION.TIME DATETIME s REAL Duration of the DOAS measurements corresponding to the retrieved profile x
4 LATITUDE.INSTRUMENT CONSTANT deg REAL Inst. geolocation. Latitude north (decimal degrees) of the location of the instrument (+ for north; - for south) x
5 LONGITUDE.INSTRUMENT CONSTANT deg REAL Inst. geolocation. Longitude east (decimal degrees) of the location of the instrument (+ for east; - for west) x
6 ALTITUDE.INSTRUMENT CONSTANT m REAL Inst. geolocation. Altitude of the instrument relative to the location site x
7 ALTITUDE [ALTITUDE|DATETIME;ALTITUDE] km REAL Retrieval effective altitude vector - possibly also dependent on DATETIME - in which case it becomes a 2D matrix x
8 PRESSURE_INDEPENDENT DATETIME;ALTITUDE hPa REAL Effective air pressure at each altitude x
9 PRESSURE_INDEPENDENT_SOURCE [CONSTANT|DATETIME|DATETIME;ALTITUDE] [empty] STRING Pressure profile source (e.g. NCEP; Sonde; ECMWF etc.) x
10 TEMPERATURE_INDEPENDENT DATETIME;ALTITUDE K REAL Effective air temperature at each altitude x
11 TEMPERATURE_INDEPENDENT_SOURCE [CONSTANT|DATETIME|DATETIME;ALTITUDE] [empty] STRING Temperature profile source (e.g. Lidar; NCEP; Sonde; ECMWF etc.) x
12 COLUMN.PARTIAL_INDEPENDENT DATETIME;ALTITUDE molec cm-2 REAL Vertical profile of partial columns of dry air number densities (for conversion between VMR and partial column profile) x
13 COLUMN.PARTIAL_INDEPENDENT_SOURCE [CONSTANT|DATETIME|DATETIME;ALTITUDE] [empty] STRING Partial columns of air source (e.g. NCEP; Sonde; ECMWF etc.) x
14 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
15 ANGLE.SOLAR_ZENITH.ASTRONOMICAL DATETIME deg REAL The solar astronomical zenith angle at which the measurement was taken x
16 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
17 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
18 ANGLE.VIEW_ZENITH DATETIME deg REAL The zenith viewing direction of the instrument x
19 LATITUDE DATETIME;ALTITUDE deg REAL The latitude of the effective air mass at each altitude (+ for north; - for south) o
20 LONGITUDE DATETIME;ALTITUDE deg REAL The longitude of the effective air mass at each altitude (+ for east; - for west) o
21 AEROSOL.OPTICAL.DEPTH_INDEPENDENT DATETIME 1 REAL The total aerosol optical depth used for the retrieval is based on a climatology; model; or auxiliary measurements o
22 AEROSOL.OPTICAL.DEPTH_ABSORPTION.SOLAR DATETIME 1 REAL The total aerosol optical depth used for the retrieval is retrieved from the Direct Sun DOAS measurements o
23 [GAS].COLUMN_ABSORPTION.SOLAR DATETIME Pmolec cm-2 REAL Total vertical column of target gas retrieved from Direct Sun DOAS measurements x
24 [GAS].COLUMN_ABSORPTION.SOLAR_UNCERTAINTY.RANDOM.STANDARD DATETIME Pmolec cm-2 REAL Total random uncertainty on the total column (expressed in same units as the column) (without smoothing error) retrieved from Direct Sun DOAS measurements x
25 [GAS].COLUMN_ABSORPTION.SOLAR_UNCERTAINTY.SYSTEMATIC.STANDARD DATETIME Pmolec cm-2 REAL Total systematic uncertainty on the retrieved total column (expressed in same units as the column) (without smoothing error) retrieved from Direct Sun DOAS measurements x
26 [GAS].COLUMN_ABSORPTION.SOLAR_AVK DATETIME;ALTITUDE 1 REAL Averaging kernel matrix associated with the total vertical column of the target gas (in molec cm-2/molec cm-2 units) retrieved from Direct Sun DOAS measurements o
27 [GAS].COLUMN.PARTIAL_ABSORPTION.SOLAR_APRIORI DATETIME;ALTITUDE Pmolec cm-2 REAL Vertical profile of apriori of partial columns per layer (in molec cm-2 units) associated with the Direct Sun column retrieval x if [GAS].COLUMN_ABSORPTION.SOLAR_AVK reported
28 SOURCE.PRODUCT INDEPENDENT
 [empty] STRING Information relevant to the source history of the Metadata and Data o
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 GEOMS-TE-UVVIS-DOAS-OFFAXIS-GAS-VA (UVVIS Variable Attributes Template for [GAS] from MAXDOAS measurements)
Download in CSV format GEOMS-TE-UVVIS-DOAS-OFFAXIS-GAS-VA.csv (last updated: December 01, 2021).
#VariablesDependencies/DimensionsUnitsData typeCommentReq
0 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
1 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
3 INTEGRATION.TIME DATETIME s REAL Duration of the DOAS measurements corresponding to the retrieved profile x
4 LATITUDE.INSTRUMENT CONSTANT deg REAL Inst. Geolocation; latitude north (decimal degrees) of the location of the instrument (+ for north; - for south) x
5 LONGITUDE.INSTRUMENT CONSTANT deg REAL Inst. geolocationeast (decimal degrees) of the location of the instrument (+ for east; - for west) x
6 ALTITUDE.INSTRUMENT CONSTANT m REAL Inst. Geolocation; altitude of the instrument relative to the location site x
7 ALTITUDE [ALTITUDE|DATETIME;ALTITUDE] km REAL Retrieval effective altitude vector - possibly also dependent on DATETIME - in which case it becomes a 2D matrix x
8 PRESSURE_INDEPENDENT DATETIME;ALTITUDE hPa REAL Effective air pressure at each altitude x
9 PRESSURE_INDEPENDENT_SOURCE [CONSTANT|DATETIME|DATETIME;ALTITUDE] [empty] STRING Pressure profile source (e.g. NCEP; Sonde; ECMWF etc.) x
10 TEMPERATURE_INDEPENDENT DATETIME;ALTITUDE K REAL Effective air temperature at each altitude x
11 TEMPERATURE_INDEPENDENT_SOURCE [CONSTANT|DATETIME|DATETIME;ALTITUDE] [empty] STRING Temperature profile source (e.g. Lidar; NCEP; Sonde; ECMWF etc.) x
12 COLUMN.PARTIAL_INDEPENDENT DATETIME;ALTITUDE molec cm-2 REAL Vertical profile of partial columns of dry air number densities (for conversion between VMR and partial column profile) x
13 COLUMN.PARTIAL_INDEPENDENT_SOURCE [CONSTANT|DATETIME|DATETIME;ALTITUDE] [empty] STRING Partial columns of air source (e.g. NCEP; Sonde; ECMWF etc.) x
14 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
15 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
16 WIND.DIRECTION.SURFACE_INDEPENDENT_SOURCE [CONSTANT|DATETIME] [empty] STRING Wind direction source (e.g. Anemometer; ECMWF etc.) x if WIND.DIRECTION.SURFACE_INDEPENDENT reported
17 WIND.SPEED.SURFACE_INDEPENDENT DATETIME m s-1 REAL Wind speed at the station o
18 WIND.SPEED.SURFACE_INDEPENDENT_SOURCE [CONSTANT|DATETIME] [empty] STRING Wind speed source (e.g. Anemometer; ECMWF etc.) x if WIND.SPEED.SURFACE_INDEPENDENT reported
19 ANGLE.SOLAR_ZENITH.ASTRONOMICAL DATETIME deg REAL The solar astronomical zenith angle at which the measurement was taken x
20 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
21 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
22 ANGLE.VIEW_ZENITH DATETIME deg REAL The zenith viewing direction of the instrument x
23 LATITUDE DATETIME;ALTITUDE deg REAL The latitude of the effective air mass at each altitude (+ for north; - for south) o
24 LONGITUDE DATETIME;ALTITUDE deg REAL The longitude of the effective air mass at each altitude (+ for east; - for west) o
25 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
26 AEROSOL.OPTICAL.DEPTH.TROPOSPHERIC_INDEPENDENT DATETIME 1 REAL The total tropospheric aerosol optical depth used for the retrieval is based on a climatology; model; or auxiliary measurements x
27 AEROSOL.OPTICAL.DEPTH.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS DATETIME 1 REAL The total tropospheric aerosol optical depth used for the retrieval is retrieved from the MAXDOAS measurements o
28 [GAS].MIXING.RATIO.VOLUME_SCATTER.SOLAR.OFFAXIS DATETIME;ALTITUDE [ppmv|ppbv|pptv] REAL Target vertical profile (in ppbv units with respect to dry air) retrieved from MAXDOAS measurements o
29 [GAS].MIXING.RATIO.VOLUME_SCATTER.SOLAR.OFFAXIS_UNCERTAINTY.RANDOM.COVARIANCE DATETIME;ALTITUDE;ALTITUDE [ppmv2|ppbv2|pptv2] REAL Total random error covariance matrix associated with the vertical profile (expressed in same units as the profile) (without smoothing error!) retrieved from MAXDOAS measurements x if [GAS].MIXING.RATIO.VOLUME_SCATTER.SOLAR.OFFAXIS reported
30 [GAS].MIXING.RATIO.VOLUME_SCATTER.SOLAR.OFFAXIS_UNCERTAINTY.SYSTEMATIC.COVARIANCE DATETIME;ALTITUDE;ALTITUDE [ppmv2|ppbv2|pptv2] REAL Total systematic error covariance matrix associated with the vertical profile (expressed in same units as the profile) retrieved from MAXDOAS measurements x if [GAS].MIXING.RATIO.VOLUME_SCATTER.SOLAR.OFFAXIS reported
31 [GAS].MIXING.RATIO.VOLUME_SCATTER.SOLAR.OFFAXIS_AVK DATETIME;ALTITUDE;ALTITUDE 1 REAL A or Averaging kernel matrix for target profile (expressed in ppbv/ppbv units) retrieved from MAXDOAS measurements. The fastest running index corresponds to the column index of the AVK transformation matrix o
32 [GAS].MIXING.RATIO.VOLUME_SCATTER.SOLAR.OFFAXIS_APRIORI DATETIME;ALTITUDE [ppmv|ppbv|pptv] REAL Apriori target vertical profile (in ppbv units) associated with the profile retrieval from MAXDOAS measurements x if [GAS].MIXING.RATIO.VOLUME_SCATTER.SOLAR.OFFAXIS_AVK reported
33 [GAS].COLUMN.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS DATETIME Pmolec cm-2 REAL Total tropospheric vertical column of target gas retrieved from MAXDOAS measurements x
34 [GAS].COLUMN.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS_UNCERTAINTY.RANDOM.STANDARD DATETIME Pmolec cm-2 REAL Total random uncertainty on the total tropospheric column (expressed in same units as the column) (without smoothing error) retrieved from MAXDOAS measurements x
35 [GAS].COLUMN.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS_UNCERTAINTY.SYSTEMATIC.STANDARD DATETIME Pmolec cm-2 REAL Total systematic uncertainty on the retrieved total tropospheric column (expressed in same units as the column) (without smoothing error) retrieved from MAXDOAS measurements x
36 [GAS].COLUMN.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS_AVK DATETIME;ALTITUDE 1 REAL Averaging kernel matrix associated with the total tropospheric vertical column of the target gas (in molec cm-2/molec cm-2 units) retrieved from MAXDOAS measurements o
37 [GAS].COLUMN.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS_APRIORI DATETIME Pmolec cm-2 REAL Apriori total tropospheric vertical column of target gas associated with the column retrieval from MAXDOAS measurements x if [GAS].COLUMN.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS_AVK reported
38 [GAS].COLUMN.PARTIAL_SCATTER.SOLAR.OFFAXIS DATETIME;ALTITUDE Pmolec cm-2 REAL Vertical profile of partial columns per layer (in molec cm-2) of target gas retrieved from MAXDOAS measurements x if [GAS].MIXING.RATIO.VOLUME_SCATTER.SOLAR.OFFAXIS reported
39 [GAS].COLUMN.PARTIAL_SCATTER.SOLAR.OFFAXIS_APRIORI DATETIME;ALTITUDE Pmolec cm-2 REAL Vertical profile of apriori of partial columns per layer (in molec cm-2) associated with the profile or column retrieval from MAXDOAS measurements x if [GAS].COLUMN.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS_AVK reported
40 SOURCE.PRODUCT INDEPENDENT
 [empty] STRING Information relevant to the source history of the Metadata and Data o
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 GEOMS-TE-UVVIS-DOAS-ZENITH-GAS-VA (UVVIS Variable Attributes Template for [GAS] from DOAS measurements)
Download in CSV format GEOMS-TE-UVVIS-DOAS-ZENITH-GAS-VA.csv (last updated: December 01, 2021).
#VariablesDependencies/DimensionsUnitsData typeCommentReq
0 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
1 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
3 INTEGRATION.TIME DATETIME s REAL Duration of the DOAS measurements corresponding to the retrieved profile x
4 LATITUDE.INSTRUMENT CONSTANT deg REAL Inst. Geolocation; latitude north (decimal degrees) of the location of the instrument (+ for north; - for south) x
5 LONGITUDE.INSTRUMENT CONSTANT deg REAL Inst. geolocation; east (decimal degrees) of the location of the instrument (+ for east; - for west) x
6 ALTITUDE.INSTRUMENT CONSTANT m REAL Inst. Geolocation; altitude of the instrument relative to the location site x
7 ALTITUDE [ALTITUDE|DATETIME;ALTITUDE] km REAL Retrieval effective altitude vector - possibly also dependent on DATETIME - in which case it becomes a 2D matrix x
8 PRESSURE_INDEPENDENT DATETIME;ALTITUDE hPa REAL Effective air pressure at each altitude x
9 PRESSURE_INDEPENDENT_SOURCE [CONSTANT|DATETIME|DATETIME;ALTITUDE] [empty] STRING Pressure profile source (e.g. NCEP; Sonde; ECMWF etc.) x
10 TEMPERATURE_INDEPENDENT DATETIME;ALTITUDE K REAL Effective air temperature at each altitude x
11 TEMPERATURE_INDEPENDENT_SOURCE [CONSTANT|DATETIME|DATETIME;ALTITUDE] [empty] STRING Temperature profile source (e.g. Lidar; NCEP; Sonde; ECMWF etc.) x
12 COLUMN.PARTIAL_INDEPENDENT DATETIME;ALTITUDE molec cm-2 REAL Vertical profile of partial columns of dry air number densities (for conversion between VMR and partial column profile) x
13 COLUMN.PARTIAL_INDEPENDENT_SOURCE [CONSTANT|DATETIME|DATETIME;ALTITUDE] [empty] STRING Partial columns of air source (e.g. NCEP; Sonde; ECMWF etc.) x
14 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
15 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
16 WIND.DIRECTION.SURFACE_INDEPENDENT_SOURCE [CONSTANT|DATETIME] [empty] STRING Wind direction source (e.g. Anemometer; ECMWF etc.) x if WIND.DIRECTION.SURFACE_INDEPENDENT reported
17 WIND.SPEED.SURFACE_INDEPENDENT DATETIME m s-1 REAL Wind speed at the station o
18 WIND.SPEED.SURFACE_INDEPENDENT_SOURCE [CONSTANT|DATETIME] [empty] STRING Wind speed source (e.g. Anemometer; ECMWF etc.) x if WIND.SPEED.SURFACE_INDEPENDENT reported
19 ANGLE.SOLAR_ZENITH.ASTRONOMICAL DATETIME deg REAL The solar astronomical zenith angle at which the measurement was taken x
20 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
21 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
22 ANGLE.VIEW_ZENITH DATETIME deg REAL The zenith viewing direction of the instrument x
23 LATITUDE DATETIME;ALTITUDE deg REAL The latitude of the effective air mass at each altitude (+ for north; - for south) o
24 LONGITUDE DATETIME;ALTITUDE deg REAL The longitude of the effective air mass at each altitude (+ for east; - for west) o
25 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
26 AEROSOL.OPTICAL.DEPTH.STRATOSPHERIC_INDEPENDENT DATETIME 1 REAL The total stratospheric aerosol optical depth used for the retrieval is based on a climatology; model; or auxiliary measurements o
27 AEROSOL.OPTICAL.DEPTH.STRATOSPHERIC_SCATTER.SOLAR.ZENITH DATETIME 1 REAL The total stratospheric aerosol optical depth used for the retrieval is retrieved from the zenith DOAS measurements o
28 [GAS].COLUMN.SLANT_SCATTER.SOLAR.ZENITH DATETIME Pmolec cm-2 REAL Zenith slant column density of target gas corresponding to DATETIME o
29 [GAS].COLUMN.SLANT.DIFFERENTIAL_SCATTER.SOLAR.ZENITH DATETIME Pmolec cm-2 REAL Zenith differential slant column density of target gas corresponding to DATETIME o
30 [GAS].MIXING.RATIO.VOLUME_SCATTER.SOLAR.ZENITH DATETIME;ALTITUDE [ppmv|ppbv|pptv] REAL Target vertical profile (in ppbv units with respect to dry air) retrieved from zenith DOAS measurements o
31 [GAS].MIXING.RATIO.VOLUME_SCATTER.SOLAR.ZENITH_UNCERTAINTY.RANDOM.COVARIANCE DATETIME;ALTITUDE;ALTITUDE [ppmv2|ppbv2|pptv2] REAL Total random error covariance matrix associated with the vertical profile (expressed in same units as the profile) (without smoothing error!) retrieved from zenith DOAS measurements x if [GAS].MIXING.RATIO.VOLUME_SCATTER.SOLAR.ZENITH reported
32 [GAS].MIXING.RATIO.VOLUME_SCATTER.SOLAR.ZENITH_UNCERTAINTY.SYSTEMATIC.COVARIANCE DATETIME;ALTITUDE;ALTITUDE [ppmv2|ppbv2|pptv2] REAL Total systematic error covariance matrix associated with the vertical profile (expressed in same units as the profile) retrieved from zenith DOAS measurements x if [GAS].MIXING.RATIO.VOLUME_SCATTER.SOLAR.ZENITH reported
33 [GAS].MIXING.RATIO.VOLUME_SCATTER.SOLAR.ZENITH_AVK DATETIME;ALTITUDE;ALTITUDE 1 REAL A or Averaging kernel matrix for retrieved target profile (expressed in ppbv/ppbv units) retrieved from zenith DOAS measurements. The fastest running index corresponds to the column index of the AVK transformation matrix o
34 [GAS].MIXING.RATIO.VOLUME_SCATTER.SOLAR.ZENITH_APRIORI DATETIME;ALTITUDE [ppmv|ppbv|pptv] REAL Apriori target vertical profile (in ppbv units) associated with the profile retrieval from zenith DOAS measurements x if [GAS].MIXING.RATIO.VOLUME_SCATTER.SOLAR.ZENITH_AVK reported
35 [GAS].COLUMN.TROPOSPHERIC_SCATTER.SOLAR.ZENITH DATETIME Pmolec cm-2 REAL Total tropospheric vertical column of target gas retrieved from zenith DOAS measurements o
36 [GAS].COLUMN.TROPOSPHERIC_SCATTER.SOLAR.ZENITH_UNCERTAINTY.RANDOM.STANDARD DATETIME Pmolec cm-2 REAL Total random uncertainty on the total tropospheric column (expressed in same units as the column) (without smoothing error) retrieved from zenith DOAS measurements x if [GAS].COLUMN.TROPOSPHERIC_SCATTER.SOLAR.ZENITH reported
37 [GAS].COLUMN.TROPOSPHERIC_SCATTER.SOLAR.ZENITH_UNCERTAINTY.SYSTEMATIC.STANDARD DATETIME Pmolec cm-2 REAL Total systematic uncertainty on the retrieved total tropospheric column (expressed in same units as the column) (without smoothing error) retrieved from zenith DOAS measurements x if [GAS].COLUMN.TROPOSPHERIC_SCATTER.SOLAR.ZENITH reported
38 [GAS].COLUMN.TROPOSPHERIC_SCATTER.SOLAR.ZENITH_AVK DATETIME;ALTITUDE 1 REAL Averaging kernel matrix associated with the total tropospheric vertical column of the target gas (in molec cm-2/molec cm-2 units) retrieved from zenith DOAS measurements o
39 [GAS].COLUMN.TROPOSPHERIC_SCATTER.SOLAR.ZENITH_APRIORI DATETIME Pmolec cm-2 REAL Apriori total tropospheric vertical column of target gas associated with the column retrieval from zenith DOAS measurements x if [GAS].COLUMN.TROPOSPHERIC_SCATTER.SOLAR.ZENITH_AVK reported
40 [GAS].COLUMN.STRATOSPHERIC_SCATTER.SOLAR.ZENITH DATETIME Pmolec cm-2 REAL Total stratospheric vertical column of target gas retrieved from zenith DOAS measurements x
41 [GAS].COLUMN.STRATOSPHERIC_SCATTER.SOLAR.ZENITH_UNCERTAINTY.RANDOM.STANDARD DATETIME Pmolec cm-2 REAL Total random uncertainty on the total stratospheric column (expressed in same units as the column) (without smoothing error) retrieved from zenith DOAS measurements x
42 [GAS].COLUMN.STRATOSPHERIC_SCATTER.SOLAR.ZENITH_UNCERTAINTY.SYSTEMATIC.STANDARD DATETIME Pmolec cm-2 REAL Total systematic uncertainty on the retrieved total stratospheric column (expressed in same units as the column) (without smoothing error) retrieved from zenith DOAS measurements x
43 [GAS].COLUMN.STRATOSPHERIC_SCATTER.SOLAR.ZENITH_AVK DATETIME;ALTITUDE 1 REAL Averaging kernel matrix associated with the total stratospheric vertical column of the target gas (in molec cm-2/molec cm-2 units) retrieved from zenith DOAS measurements o
44 [GAS].COLUMN.STRATOSPHERIC_SCATTER.SOLAR.ZENITH_APRIORI DATETIME Pmolec cm-2 REAL Apriori total stratospheric vertical column of target gas associated with the column retrieval from zenith DOAS measurements x if [GAS].COLUMN.STRATOSPHERIC_SCATTER.SOLAR.ZENITH_AVK reported
45 [GAS].COLUMN.STRATOSPHERIC_SCATTER.SOLAR.ZENITH_AMF DATETIME 1 REAL Air mass factor associated with the total stratospheric vertical column of the target gas retrieved from zenith DOAS measurements o
46 [GAS].COLUMN.PARTIAL_SCATTER.SOLAR.ZENITH DATETIME;ALTITUDE Pmolec cm-2 REAL Vertical profile of partial columns per layer (in molec cm-2) of target gas retrieved from zenith DOAS measurements x if [GAS].MIXING.RATIO.VOLUME_SCATTER.SOLAR.ZENITH reported
47 [GAS].COLUMN.PARTIAL_SCATTER.SOLAR.ZENITH_APRIORI DATETIME;ALTITUDE Pmolec cm-2 REAL Vertical profile of apriori of partial columns per layer (in molec cm-2) associated with the profile retrieval from zenith DOAS measurements x if [GAS].COLUMN.STRATOSPHERIC_SCATTER.SOLAR.ZENITH_AVK reported
48 SOURCE.PRODUCT INDEPENDENT
 [empty] STRING Information relevant to the source history of the Metadata and Data o
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 GEOMS-TE-UVVIS-DOAS-OFFAXIS-AEROSOL-VA (UVVIS Variable Attributes Template for tropospheric aerosol from MAXDOAS off-axis measurements)
Download in CSV format GEOMS-TE-UVVIS-DOAS-OFFAXIS-AEROSOL-VA.csv (last updated: December 01, 2021).
#VariablesDependencies/DimensionsUnitsData typeCommentReq
0 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
1 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
3 INTEGRATION.TIME DATETIME s REAL Duration of the MAXDOAS measurements corresponding to the retrieved profile x
4 LATITUDE.INSTRUMENT CONSTANT deg REAL Inst. Geolocation; latitude north (decimal degrees) of the location of the instrument (+ for north; - for south) x
5 LONGITUDE.INSTRUMENT CONSTANT deg REAL Inst. geolocation east (decimal degrees) of the location of the instrument (+ for east; - for west) x
6 ALTITUDE.INSTRUMENT CONSTANT m REAL Inst. geolocation; altitude of the instrument relative to the location site x
7 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
8 ALTITUDE [ALTITUDE|DATETIME;ALTITUDE] km REAL Retrieval effective altitude vector - possibly also dependent on DATETIME - in which case it becomes a 2D matrix x
9 PRESSURE_INDEPENDENT DATETIME;ALTITUDE hPa REAL Effective air pressure at each altitude x
10 PRESSURE_INDEPENDENT_SOURCE [CONSTANT|DATETIME|DATETIME;ALTITUDE] [empty] STRING Pressure profile source (e.g. NCEP; Sonde; ECMWF etc.) x
11 TEMPERATURE_INDEPENDENT DATETIME;ALTITUDE K REAL Effective air temperature at each altitude x
12 TEMPERATURE_INDEPENDENT_SOURCE [CONSTANT|DATETIME|DATETIME;ALTITUDE] [empty] STRING Temperature profile source (e.g. Lidar; NCEP; Sonde; ECMWF etc.) x
13 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
14 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
15 WIND.DIRECTION.SURFACE_INDEPENDENT_SOURCE [CONSTANT|DATETIME] [empty] STRING Wind direction source (e.g. Anemometer; ECMWF etc.) x if WIND.DIRECTION.SURFACE_INDEPENDENT reported
16 WIND.SPEED.SURFACE_INDEPENDENT DATETIME m s-1 REAL Wind speed at the station o
17 WIND.SPEED.SURFACE_INDEPENDENT_SOURCE [CONSTANT|DATETIME] [empty] STRING Wind speed source (e.g. Anemometer; ECMWF etc.) x if WIND.SPEED.SURFACE_INDEPENDENT reported
18 ANGLE.SOLAR_ZENITH.ASTRONOMICAL DATETIME deg REAL The solar astronomical zenith angle at which the measurement was taken x
19 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
20 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
21 ANGLE.VIEW_ZENITH DATETIME deg REAL The zenith viewing direction of the instrument x
22 LATITUDE DATETIME;ALTITUDE deg REAL The latitude of the effective air mass at each altitude (+ for north; - for south) o
23 LONGITUDE DATETIME;ALTITUDE deg REAL The longitude of the effective air mass at each altitude (+ for east; - for west) o
24 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
25 AEROSOL.SINGLE.SCATTERING.ALBEDO_INDEPENDENT [DATETIME|DATETIME;WAVELENGTH] 1 REAL The aerosol single scattering albedo used for the retrievals o
26 AEROSOL.ASYMMETRY.FACTOR_INDEPENDENT [DATETIME|DATETIME;WAVELENGTH] 1 REAL The aerosol asymmetry factor of the phase function used for the retrievals o
27 AEROSOL.EXTINCTION.COEFFICIENT_SCATTER.SOLAR.OFFAXIS [DATETIME;ALTITUDE|DATETIME;WAVELENGTH;ALTITUDE] km-1 REAL Retrieved aerosol extinction vertical profile x
28 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
29 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
30 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
31 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
32 AEROSOL.OPTICAL.DEPTH.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS [DATETIME|DATETIME;WAVELENGTH] 1 REAL The total tropospheric aerosol optical depth retrieved from the measurements. x
33 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
34 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
35 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
36 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
37 SOURCE.PRODUCT INDEPENDENT
 [empty] STRING Information relevant to the source history of the Metadata and Data o
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