! !NOTE: the section numbers refer to the Metadata Guidelines document. ! ! Section 4.1: Originator Attributes ! ---------------------------------- ! PI_NAME=Van Roozendael; Michel PI_AFFILIATION=Belgian Institute for Space Aeronomy;BIRA.IASB PI_ADDRESS=Avenue Circulaire, 3;B-1180 Brussels;BELGIUM PI_EMAIL=michelv@aeronomie.be ! DO_NAME=Hendrick; Francois DO_AFFILIATION=Belgian Institute for Space Aeronomy;BIRA.IASB DO_ADDRESS=Avenue Circulaire, 3;B-1180 Brussels;BELGIUM DO_EMAIL=franch@aeronomie.be ! DS_NAME=Fayt; Caroline DS_AFFILIATION=Belgian Institute for Space Aeronomy;BIRA.IASB DS_ADDRESS=Avenue Circulaire, 3;B-1180 Brussels;BELGIUM DS_EMAIL=caroline.fayt@aeronomie.be ! ! Section 4.2: Dataset Attributes ! ------------------------------- ! DATA_DESCRIPTION=MAXDOAS vmr vertical profile data of NO2 at Xianghe (China). DATA_DISCIPLINE=ATMOSPHERIC.PHYSICS;REMOTE.SENSING;GROUNDBASED DATA_GROUP=EXPERIMENTAL; PROFILE.STATIONARY DATA_LOCATION=XIANGHE DATA_SOURCE=UVVIS.DOAS.OFFAXIS.NO2_BIRA.IASB007 DATA_LEVEL=02 ! DATA_VARIABLES=DATETIME;DATETIME.START;DATETIME.STOP;INTEGRATION.TIME;LATITUDE.INSTRUMENT;LONGITUDE.INSTRUMENT;ALTITUDE.INSTRUMENT;ALTITUDE;PRESSURE_INDEPENDENT;PRESSURE_INDEPENDENT_SOURCE;TEMPERATURE_INDEPENDENT;TEMPERATURE_INDEPENDENT_SOURCE;COLUMN.PARTIAL_INDEPENDENT;COLUMN.PARTIAL_INDEPENDENT_SOURCE;ALTITUDE.BOUNDARIES;ANGLE.SOLAR_ZENITH.ASTRONOMICAL;ANGLE.SOLAR_AZIMUTH;ANGLE.VIEW_AZIMUTH;ANGLE.VIEW_ZENITH;LATITUDE;LONGITUDE;CLOUD.CONDITIONS;AEROSOL.OPTICAL.DEPTH.TROPOSPHERIC_INDEPENDENT;AEROSOL.OPTICAL.DEPTH.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS;NO2.MIXING.RATIO.VOLUME_SCATTER.SOLAR.OFFAXIS;NO2.MIXING.RATIO.VOLUME_SCATTER.SOLAR.OFFAXIS_UNCERTAINTY.RANDOM.COVARIANCE;NO2.MIXING.RATIO.VOLUME_SCATTER.SOLAR.OFFAXIS_UNCERTAINTY.SYSTEMATIC.COVARIANCE;NO2.MIXING.RATIO.VOLUME_SCATTER.SOLAR.OFFAXIS_APRIORI;NO2.MIXING.RATIO.VOLUME_SCATTER.SOLAR.OFFAXIS_AVK;NO2.COLUMN.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS;NO2.COLUMN.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS_UNCERTAINTY.RANDOM.STANDARD;NO2.COLUMN.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS_UNCERTAINTY.SYSTEMATIC.STANDARD;NO2.COLUMN.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS_APRIORI;NO2.COLUMN.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS_AVK;NO2.COLUMN.PARTIAL_SCATTER.SOLAR.OFFAXIS;NO2.COLUMN.PARTIAL_SCATTER.SOLAR.OFFAXIS_APRIORI ! DATA_START_DATE=20060401T033000Z DATA_STOP_DATE=20060431T233000Z DATA_FILE_VERSION=004 DATA_MODIFICATIONS=None DATA_QUALITY=RD DATA_TEMPLATE=GEOMS-TE-UVVIS-DOAS-OFFAXIS-GAS-007 DATA_CAVEATS= DATA_RULES_OF_USE=please contact M. Van Roozendael DATA_ACKNOWLEDGEMENT=please contact M. Van Roozendael ! ! ! Section 4.3: File Attributes ! ---------------------------- ! FILE_NAME= FILE_GENERATION_DATE=20151116t155950z FILE_ACCESS=NDACC FILE_PROJECT_ID=NORS FILE_ASSOCIATION=NDACC FILE_META_VERSION=04R017 ; IDLCR8HDF ! ! Section 5.1 & 5.2: Variable Attributes ! -------------------------------------- ! VAR_NAME=DATETIME VAR_DESCRIPTION=datetime (UT), defined relative to reference datetime of Jan. 1, 2000 at 0:00:00 UT which is equal to 0.00 VAR_NOTES=mean time of the measurement sequence used for each retrieval VAR_DATA_TYPE=DOUBLE VAR_DIMENSION=1 VAR_SIZE=35 VAR_DEPEND=INDEPENDENT VAR_UNITS=MJD2K VAR_SI_CONVERSION=0;86400;s VAR_VALID_MIN=-5500 VAR_VALID_MAX=10000 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-90000.000000000 ! VIS_LABEL=Datetime (MJD2K) VIS_FORMAT=F18.9 VIS_PLOT_TYPE=XY.TIMESERIES VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=0 VIS_SCALE_MAX=10000 ! VAR_NAME=DATETIME.START VAR_DESCRIPTION=datetime start(UT), defined relative to reference datetime of Jan. 1, 2000 at 0:00:00 UT which is equal to 0.00 VAR_NOTES=start time of the measurement sequence used for each retrieval VAR_DATA_TYPE=DOUBLE VAR_DIMENSION=1 VAR_SIZE=35 VAR_DEPEND=DATETIME VAR_UNITS=MJD2K VAR_SI_CONVERSION=0;86400;s VAR_VALID_MIN=-5500 VAR_VALID_MAX=10000 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-90000.000000000 ! VIS_LABEL=Datetime start(MJD2K) VIS_FORMAT=F18.9 VIS_PLOT_TYPE=XY.TIMESERIES VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=0 VIS_SCALE_MAX=10000 ! VAR_NAME=DATETIME.STOP VAR_DESCRIPTION=datetime stop(UT), defined relative to reference datetime of Jan. 1, 2000 at 0:00:00 UT which is equal to 0.00 VAR_NOTES=End time of the measurement sequence used for each retrieval VAR_DATA_TYPE=DOUBLE VAR_DIMENSION=1 VAR_SIZE=35 VAR_DEPEND=DATETIME VAR_UNITS=MJD2K VAR_SI_CONVERSION=0;86400;s VAR_VALID_MIN=-5500 VAR_VALID_MAX=10000 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-90000.000000000 ! VIS_LABEL=Datetime stop(MJD2K) VIS_FORMAT=F18.9 VIS_PLOT_TYPE=XY.TIMESERIES VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=0 VIS_SCALE_MAX=10000 ! VAR_NAME=INTEGRATION.TIME VAR_DESCRIPTION=duration of the measurement corresponding to the profile VAR_NOTES= VAR_DATA_TYPE=REAL VAR_DIMENSION=1 VAR_SIZE=35 VAR_DEPEND=DATETIME VAR_UNITS=s VAR_SI_CONVERSION=0;1;s VAR_VALID_MIN=0 VAR_VALID_MAX=13600 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-9.0000E+004 ! VIS_LABEL=measurement duration (s) VIS_FORMAT=F12.4 VIS_PLOT_TYPE=XY.TIMESERIES VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=0 VIS_SCALE_MAX=13600 ! VAR_NAME=LATITUDE.INSTRUMENT VAR_DESCRIPTION=latitude north (decimal degrees) of the location of the instrument VAR_NOTES=sign convention: + for north and - for south VAR_DATA_TYPE=REAL VAR_DIMENSION=1 VAR_SIZE=1 VAR_DEPEND=CONSTANT VAR_UNITS=deg VAR_SI_CONVERSION=0;0.017453291319943;rad VAR_VALID_MIN=-90 VAR_VALID_MAX=90 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-90000.00 ! VIS_LABEL=Site Lat N (deg) VIS_FORMAT=F9.2 VIS_PLOT_TYPE=XY VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=-90 VIS_SCALE_MAX=90 ! VAR_NAME=LONGITUDE.INSTRUMENT VAR_DESCRIPTION=longitude east (decimal degrees) of the location of the instrument VAR_NOTES=sign convention: + for east and - for west VAR_DATA_TYPE=REAL VAR_DIMENSION=1 VAR_SIZE=1 VAR_DEPEND=CONSTANT VAR_UNITS=deg VAR_SI_CONVERSION=0;0.017453291319943;rad VAR_VALID_MIN=-180 VAR_VALID_MAX=180 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-90000.00 ! VIS_LABEL=Site Lon E (deg) VIS_FORMAT=F9.2 VIS_PLOT_TYPE=XY VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=-90 VIS_SCALE_MAX=90 ! VAR_NAME=ALTITUDE.INSTRUMENT VAR_DESCRIPTION=altitude of the instrument relative to the location site VAR_NOTES= VAR_DATA_TYPE=REAL VAR_DIMENSION=1 VAR_SIZE=1 VAR_DEPEND=CONSTANT VAR_UNITS=m VAR_SI_CONVERSION=0;1;m VAR_VALID_MIN=-0.05 VAR_VALID_MAX=5000 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-90000.00 ! VIS_LABEL=Instrument Altitude (m) VIS_FORMAT=F9.2 VIS_PLOT_TYPE=XY VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=-0.01 VIS_SCALE_MAX=1000 ! VAR_NAME=ALTITUDE VAR_DESCRIPTION=Grid of altitude levels upon which the retrieved target profile as well as pressure and temperature profiles are reported VAR_NOTES=these altitudes are the centers of the retrieval altitude layers (geometric mean between the 2 layer boundaries); the reported number densities, P and T are effective layer values. VAR_DATA_TYPE=REAL VAR_DIMENSION=1 VAR_SIZE=13 VAR_DEPEND=INDEPENDENT VAR_UNITS=km VAR_SI_CONVERSION=0;1000;m VAR_VALID_MIN=0 VAR_VALID_MAX=120 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-90000.000 ! VIS_LABEL=Altitude (km) VIS_PLOT_TYPE=XY.PROFILE VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=0 VIS_SCALE_MAX=120 ! VAR_NAME=PRESSURE_INDEPENDENT VAR_DESCRIPTION=Total effective air pressures in layers for vertical profile retrieval VAR_NOTES=Pressure/temperature profiles are taken from a climatology (US standard); the pressure values represent the effective pressure in each layer and are reported at the center altitude of each layer VAR_DATA_TYPE=REAL VAR_DIMENSION=2 VAR_SIZE=13;35 VAR_DEPEND=ALTITUDE;DATETIME VAR_UNITS=hPa VAR_SI_CONVERSION=0;100;m-1 kg s-2 VAR_VALID_MIN=0 VAR_VALID_MAX=1100 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-9.0000E+004 ! VIS_LABEL=P (hPa) VIS_FORMAT=E12.4 VIS_PLOT_TYPE=XY.PROFILE VIS_SCALE_TYPE=LOG;DECREASE VIS_SCALE_MIN=0.01 VIS_SCALE_MAX=1020 ! VAR_NAME=PRESSURE_INDEPENDENT_SOURCE VAR_DESCRIPTION=Pressure profile source (e.g. NCEP, Sonde, ECMWF etc.) VAR_NOTES= VAR_DATA_TYPE=STRING VAR_DIMENSION=1 VAR_SIZE=1 VAR_DEPEND=CONSTANT VAR_UNITS= VAR_SI_CONVERSION= VAR_VALID_MIN= VAR_VALID_MAX= VAR_FILL_VALUE= ! ! VAR_NAME=TEMPERATURE_INDEPENDENT VAR_DESCRIPTION=effective air temperatures in layers for vertical profile retrieval VAR_NOTES=Pressure/temperature profiles are taken from a climatology (US standard); the pressure values represent the effective pressure in each layer and are reported at the center altitude of each layer VAR_DATA_TYPE=REAL VAR_DIMENSION=2 VAR_SIZE=13;35 VAR_DEPEND=ALTITUDE;DATETIME VAR_UNITS=K VAR_SI_CONVERSION=0;1;K VAR_VALID_MIN=0 VAR_VALID_MAX=500 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-90000.000 ! VIS_LABEL=T (K) VIS_FORMAT=F10.3 VIS_PLOT_TYPE=XY.PROFILE VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=0 VIS_SCALE_MAX=500 ! VAR_NAME=TEMPERATURE_INDEPENDENT_SOURCE VAR_DESCRIPTION=Temperature profile source (e.g. NCEP, Sonde, ECMWF etc.) VAR_NOTES= VAR_DATA_TYPE=STRING VAR_DIMENSION=1 VAR_SIZE=1 VAR_DEPEND=CONSTANT VAR_UNITS= VAR_SI_CONVERSION= VAR_VALID_MIN= VAR_VALID_MAX= VAR_FILL_VALUE= ! ! VAR_NAME=COLUMN.PARTIAL_INDEPENDENT VAR_DESCRIPTION=Vertical profile of partial columns of dry air number densities (for conversion between VMR and partial column profile) VAR_NOTES= VAR_DATA_TYPE=REAL VAR_DIMENSION=2 VAR_SIZE=13;35 VAR_DEPEND=ALTITUDE;DATETIME VAR_UNITS=molec cm-2 VAR_SI_CONVERSION=0.0;1.66054E-20;mol m-2 VAR_VALID_MIN=0.0 VAR_VALID_MAX=2.00E+025 VAR_FILL_VALUE=-90000.0 ! ! VAR_NAME=COLUMN.PARTIAL_INDEPENDENT_SOURCE VAR_DESCRIPTION=Partial columns of air source (e.g. NCEP; Sonde; ECMWF etc.) VAR_NOTES= VAR_DATA_TYPE=STRING VAR_DIMENSION=1 VAR_SIZE=1 VAR_DEPEND=CONSTANT VAR_UNITS= VAR_SI_CONVERSION= VAR_VALID_MIN= VAR_VALID_MAX= VAR_FILL_VALUE= ! ! VAR_NAME=ALTITUDE.BOUNDARIES VAR_DESCRIPTION=2D matrix providing the layer boundaries used for vertical profile retrieval VAR_NOTES=The retrieved partial columns are given at the center between the boundaries provided in this vector.The lower most boundary is at the altitude of the site VAR_DATA_TYPE=REAL VAR_DIMENSION=2 VAR_SIZE=2;13 VAR_DEPEND=INDEPENDENT;ALTITUDE VAR_UNITS=km VAR_SI_CONVERSION=0;1000;m VAR_VALID_MIN=0 VAR_VALID_MAX=120 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-90000.000 ! VIS_LABEL=Altitude boundaries (km) VIS_FORMAT=F10.3 VIS_PLOT_TYPE=XY.PROFILE VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=0 VIS_SCALE_MAX=120 ! VAR_NAME=ANGLE.SOLAR_ZENITH.ASTRONOMICAL VAR_DESCRIPTION=astronomical zenith angle of the sun VAR_NOTES= VAR_DATA_TYPE=REAL VAR_DIMENSION=1 VAR_SIZE=35 VAR_DEPEND=DATETIME VAR_UNITS=deg VAR_SI_CONVERSION=0; 0.017453291319943;rad VAR_VALID_MIN=0 VAR_VALID_MAX=180 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-90000.00 ! VIS_LABEL=SZA (deg) VIS_FORMAT=F9.2 VIS_PLOT_TYPE=XY VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=0 VIS_SCALE_MAX=180 ! VAR_NAME=ANGLE.SOLAR_AZIMUTH VAR_DESCRIPTION=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) VAR_NOTES= VAR_DATA_TYPE=REAL VAR_DIMENSION=1 VAR_SIZE=35 VAR_DEPEND=DATETIME VAR_UNITS=deg VAR_SI_CONVERSION=0; 0.017453291319943;rad VAR_VALID_MIN=0.0 VAR_VALID_MAX=360.0 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-90000.00 ! VIS_LABEL=Solar azimuth (deg) VIS_FORMAT=F9.2 VIS_PLOT_TYPE=XY VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=-180 VIS_SCALE_MAX=180 ! VAR_NAME=ANGLE.VIEW_AZIMUTH VAR_DESCRIPTION=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) VAR_NOTES= VAR_DATA_TYPE=REAL VAR_DIMENSION=1 VAR_SIZE=35 VAR_DEPEND=DATETIME VAR_UNITS=deg VAR_SI_CONVERSION=0; 0.017453291319943;rad VAR_VALID_MIN=0.0 VAR_VALID_MAX=360.0 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-90000.00 ! VIS_LABEL=Instrument pointing azimuth (deg) VIS_FORMAT=F9.2 VIS_PLOT_TYPE=XY VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=-180 VIS_SCALE_MAX=180 ! VAR_NAME=ANGLE.VIEW_ZENITH VAR_DESCRIPTION=pointing zenith angle of the MAXDOAS VAR_NOTES= VAR_DATA_TYPE=REAL VAR_DIMENSION=1 VAR_SIZE=35 VAR_DEPEND=DATETIME VAR_UNITS=deg VAR_SI_CONVERSION=0; 0.017453291319943;rad VAR_VALID_MIN=0 VAR_VALID_MAX=180 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-90000.00 ! VIS_LABEL=Instrument pointing zenith (deg) VIS_FORMAT=F9.2 VIS_PLOT_TYPE=XY VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=0 VIS_SCALE_MAX=180 ! VAR_NAME=LATITUDE VAR_DESCRIPTION=Latitude of the effective air mass. Values are given for each altitude layer (ALTITUDE) VAR_NOTES=sign convention: + for north and - for south VAR_DATA_TYPE=REAL VAR_DIMENSION=2 VAR_SIZE=13;35 VAR_DEPEND=ALTITUDE;DATETIME VAR_UNITS=deg VAR_SI_CONVERSION=0;0.017453292519943;rad VAR_VALID_MIN=-90 VAR_VALID_MAX=90 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-9.0000E+004 ! VIS_LABEL=Measurement Lat N (deg) VIS_FORMAT=F9.2 VIS_PLOT_TYPE=XY VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=-90 VIS_SCALE_MAX=90 ! VAR_NAME=LONGITUDE VAR_DESCRIPTION=Longitude of the effective air mass. Values are given for each altitude layer (ALTITUDE) VAR_NOTES=sign convention: + for east and - for west VAR_DATA_TYPE=REAL VAR_DIMENSION=2 VAR_SIZE=13;35 VAR_DEPEND=ALTITUDE;DATETIME VAR_UNITS=deg VAR_SI_CONVERSION=0;0.017453292519943;rad VAR_VALID_MIN=-180 VAR_VALID_MAX=180 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-9.0000E+004 ! VIS_LABEL=Measurement Lon E (deg) VIS_FORMAT=F9.2 VIS_PLOT_TYPE=XY VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=-180 VIS_SCALE_MAX=180 ! VAR_NAME=CLOUD.CONDITIONS VAR_DESCRIPTION=Possible Values: clear-sky; thin clouds; thick clouds; broken clouds; [empty]. [empty] means that the cloud retrieval is not successful or not possible VAR_NOTES= VAR_DATA_TYPE=STRING VAR_DIMENSION=1 VAR_SIZE=35 VAR_DEPEND=DATETIME VAR_UNITS= VAR_SI_CONVERSION= VAR_VALID_MIN= VAR_VALID_MAX= VAR_FILL_VALUE= ! VIS_LABEL=cloud conditions ! VAR_NAME=AEROSOL.OPTICAL.DEPTH.TROPOSPHERIC_INDEPENDENT VAR_DESCRIPTION=TROPOSPHERIC aerosol optical depth from auxiliary measurements or a climatology used for the retrievals (off-axis) VAR_NOTES= VAR_DATA_TYPE=REAL VAR_DIMENSION=1 VAR_SIZE=35 VAR_DEPEND=DATETIME VAR_UNITS=DIMENSIONLESS VAR_SI_CONVERSION=0;1;DIMENSIONLESS VAR_VALID_MIN=0 VAR_VALID_MAX=5 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-90000.00 ! VIS_LABEL=aerosol optical depth (TROPOSPHERIC) (off-axis) VIS_FORMAT=F9.2 VIS_PLOT_TYPE=XY.TIMESERIES VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=0 VIS_SCALE_MAX=5 ! VAR_NAME=AEROSOL.OPTICAL.DEPTH.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS VAR_DESCRIPTION=tropospheric aerosol optical depth retrieved from the measurements (at the same wavelenght than the retrieval: here 477nm) VAR_NOTES= VAR_DATA_TYPE=REAL VAR_DIMENSION=1 VAR_SIZE=35 VAR_DEPEND=DATETIME VAR_UNITS=DIMENSIONLESS VAR_SI_CONVERSION=0;1;DIMENSIONLESS VAR_VALID_MIN=0 VAR_VALID_MAX=10 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-90000.00 ! VIS_LABEL=aerosol optical depth (tropospheric) VIS_FORMAT=F9.2 VIS_PLOT_TYPE=XY.TIMESERIES VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=0 VIS_SCALE_MAX=3 ! VAR_NAME=NO2.MIXING.RATIO.VOLUME_SCATTER.SOLAR.OFFAXIS VAR_DESCRIPTION=retrieved vertical profile of NO2 from MAXDOAS measurements (in the VIS, at 477nm), in VMR units VAR_NOTES= VAR_DATA_TYPE=REAL VAR_DIMENSION=2 VAR_SIZE=13;35 VAR_DEPEND=ALTITUDE;DATETIME VAR_UNITS=ppbv VAR_SI_CONVERSION=0; 10-9; ppv VAR_VALID_MIN=-9 VAR_VALID_MAX=300 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-9.0000E+004 ! VIS_LABEL=Tropospheric NO2 VMR (ppbv) (off-axis) VIS_FORMAT=E12.4 VIS_PLOT_TYPE=XY.PROFILE VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=-9 VIS_SCALE_MAX=-99 ! VAR_NAME=NO2.MIXING.RATIO.VOLUME_SCATTER.SOLAR.OFFAXIS_UNCERTAINTY.RANDOM.COVARIANCE VAR_DESCRIPTION=total random error covariance matrix associated with the retrieved vertical profiles of NO2, in VMR units VAR_NOTES=This error covariance matrix includes the contributions from the measurement error and the model parameters random errors, not the smoothing error. VAR_DATA_TYPE=REAL VAR_DIMENSION=3 VAR_SIZE=13;13;35 VAR_DEPEND=ALTITUDE;ALTITUDE;DATETIME VAR_UNITS=ppbv2 VAR_SI_CONVERSION=0; 10-18; ppv2 VAR_VALID_MIN=-9 VAR_VALID_MAX=99 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-9.0000E+004 ! VIS_LABEL=NO2 profile retrieval random error covariance (ppbv^2) (off-axis) VIS_FORMAT=E12.4 VIS_PLOT_TYPE=XYZ.COLOUR VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=-9 VIS_SCALE_MAX=-99 ! VAR_NAME=NO2.MIXING.RATIO.VOLUME_SCATTER.SOLAR.OFFAXIS_UNCERTAINTY.SYSTEMATIC.COVARIANCE VAR_DESCRIPTION=total systematic error covariance matrix associated with the retrieved vertical profiles of NO2, in VMR units VAR_NOTES=This error covariance matrix includes the contributions from the measurement error and the model parameters random errors, not the smoothing error. VAR_DATA_TYPE=REAL VAR_DIMENSION=3 VAR_SIZE=13;13;35 VAR_DEPEND=ALTITUDE;ALTITUDE;DATETIME VAR_UNITS=ppbv2 VAR_SI_CONVERSION=0; 10-18; ppv2 VAR_VALID_MIN=-9 VAR_VALID_MAX=99 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-9.0000E+004 ! VIS_LABEL=NO2 profile retrieval systematic error covariance (ppbv^2) (off-axis) VIS_FORMAT=E12.4 VIS_PLOT_TYPE=XYZ.COLOUR VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=-9 VIS_SCALE_MAX=-99 ! VAR_NAME=NO2.MIXING.RATIO.VOLUME_SCATTER.SOLAR.OFFAXIS_APRIORI VAR_DESCRIPTION=a priori vertical profile of NO2 used in the retrieval in VMR units (off-axis) VAR_NOTES=the same a priorti vertical profile was taken for all days in the present datafile VAR_DATA_TYPE=REAL VAR_DIMENSION=2 VAR_SIZE=13;35 VAR_DEPEND=ALTITUDE;DATETIME VAR_UNITS=ppbv VAR_SI_CONVERSION=0; 10-9; ppv VAR_VALID_MIN=-1 VAR_VALID_MAX=199 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-9.0000E+004 ! VIS_LABEL=NO2 apriori VMR (ppbv) VIS_FORMAT=E12.4 VIS_PLOT_TYPE=XY.PROFILE VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=-1 VIS_SCALE_MAX=-99 ! VAR_NAME=NO2.MIXING.RATIO.VOLUME_SCATTER.SOLAR.OFFAXIS_AVK VAR_DESCRIPTION=averaging kernel matrix (AVK) of the retrieved vertical profile of NO2, in VMR/VMR units VAR_NOTES=dimension 1 are the AVK rows; dimension 2 are the AVK columns VAR_DATA_TYPE=REAL VAR_DIMENSION=3 VAR_SIZE=13;13;35 VAR_DEPEND=ALTITUDE;ALTITUDE;DATETIME VAR_UNITS=DIMENSIONLESS VAR_SI_CONVERSION=0; 1; DIMENSIONLESS VAR_VALID_MIN=-2 VAR_VALID_MAX=2 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-9.0000E+004 ! VIS_LABEL=NO2 VMR averaging kernel (VMR/VMR) (off-axis) VIS_FORMAT=E12.4 VIS_PLOT_TYPE=XYZ.COLOUR VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=-2 VIS_SCALE_MAX=2 ! VAR_NAME=NO2.COLUMN.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS VAR_DESCRIPTION=retrieved NO2 total tropospheric column corresponding to retrieved vmr profiles (off-axis) VAR_NOTES= VAR_DATA_TYPE=REAL VAR_DIMENSION=1 VAR_SIZE=35 VAR_DEPEND=DATETIME VAR_UNITS=Pmolec cm-2 VAR_SI_CONVERSION=0; 1.660539E-5; mol m-2 VAR_VALID_MIN=-1.00E+02 VAR_VALID_MAX=1.00E+03 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-9.0000E+004 ! VIS_LABEL=NO2 vertical tropospheric column (1E15 molec cm-2)(off-axis) VIS_FORMAT=E12.4 VIS_PLOT_TYPE=XY.TIMESERIES VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=-1.00E+02 VIS_SCALE_MAX=1.00E+03 ! VAR_NAME=NO2.COLUMN.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS_UNCERTAINTY.RANDOM.STANDARD VAR_DESCRIPTION=total random uncertainty on the retrieved total vertical columns of NO2(off-axis) VAR_NOTES=smoothing error is not included! VAR_DATA_TYPE=REAL VAR_DIMENSION=1 VAR_SIZE=35 VAR_DEPEND=DATETIME VAR_UNITS=Pmolec cm-2 VAR_SI_CONVERSION=0; 1.660539E-5; mol m-2 VAR_VALID_MIN=-1.00E+02 VAR_VALID_MAX=1.00E+03 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-9.0000E+004 ! VIS_LABEL=NO2 vertical tropospheric column random uncertainty (1E15 molec cm-2)(off-axis) VIS_FORMAT=E12.4 VIS_PLOT_TYPE=XY.TIMESERIES VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=-1.00E+02 VIS_SCALE_MAX=1.00E+03 ! VAR_NAME=NO2.COLUMN.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS_UNCERTAINTY.SYSTEMATIC.STANDARD VAR_DESCRIPTION=total systematic uncertainty on the retrieved total vertical columns of NO2(off-axis) VAR_NOTES= VAR_DATA_TYPE=REAL VAR_DIMENSION=1 VAR_SIZE=35 VAR_DEPEND=DATETIME VAR_UNITS=Pmolec cm-2 VAR_SI_CONVERSION=0; 1.660539E-5; mol m-2 VAR_VALID_MIN=-1.00E+02 VAR_VALID_MAX=1.00E+03 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-9.0000E+004 ! VIS_LABEL=NO2 vertical tropospheric column systematic uncertainty (1E15 molec cm-2)(off-axis) VIS_FORMAT=E12.4 VIS_PLOT_TYPE=XY.TIMESERIES VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=-1.00E+02 VIS_SCALE_MAX=1.00E+03 ! VAR_NAME=NO2.COLUMN.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS_APRIORI VAR_DESCRIPTION=apriori NO2 total tropospheric column corresponding to retrieved vmr apriori profiles(off-axis) VAR_NOTES= VAR_DATA_TYPE=REAL VAR_DIMENSION=1 VAR_SIZE=35 VAR_DEPEND=DATETIME VAR_UNITS=Pmolec cm-2 VAR_SI_CONVERSION=0; 1.660539E-5; mol m-2 VAR_VALID_MIN=-1.00E+02 VAR_VALID_MAX=1.00E+03 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-9.0000E+004 ! VIS_LABEL=apriori NO2 vertical tropospheric column (1E15 molec cm-2)(off-axis) VIS_FORMAT=E12.4 VIS_PLOT_TYPE=XY.TIMESERIES VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=-1.00E+02 VIS_SCALE_MAX=1.00E+03 ! VAR_NAME=NO2.COLUMN.TROPOSPHERIC_SCATTER.SOLAR.OFFAXIS_AVK VAR_DESCRIPTION=tropospheric vertical column averaging kernel for NO2 derived from mixing ratio averaging kernel (off-axis) VAR_NOTES=this averaging kernel multiplies the partial column vector in order to get smoothed total column VAR_DATA_TYPE=REAL VAR_DIMENSION=2 VAR_SIZE=13;35 VAR_DEPEND=ALTITUDE;DATETIME VAR_UNITS=DIMENSIONLESS VAR_SI_CONVERSION=0; 1; DIMENSIONLESS VAR_VALID_MIN=-10 VAR_VALID_MAX=10 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-9.0000E+004 ! VIS_LABEL=NO2 tropospheric column averaging kernel (off-axis) VIS_FORMAT=E12.4 VIS_PLOT_TYPE=XY.PROFILE VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=-2 VIS_SCALE_MAX=5 ! VAR_NAME=NO2.COLUMN.PARTIAL_SCATTER.SOLAR.OFFAXIS VAR_DESCRIPTION=retrieved NO2 (vertical) partial columns in the retrieved layers (off-axis) VAR_NOTES= VAR_DATA_TYPE=REAL VAR_DIMENSION=2 VAR_SIZE=13;35 VAR_DEPEND=ALTITUDE;DATETIME VAR_UNITS=Pmolec cm-2 VAR_SI_CONVERSION=0; 1.660539E-5; mol m-2 VAR_VALID_MIN=-1.00E+02 VAR_VALID_MAX=1.00E+03 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-9.0000E+004 ! VIS_LABEL=NO2 partial column (1E15 molec cm-2) (off-axis) VIS_FORMAT=E12.4 VIS_PLOT_TYPE=XY.PROFILE VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=-1.00E+02 VIS_SCALE_MAX=1.00E+03 ! VAR_NAME=NO2.COLUMN.PARTIAL_SCATTER.SOLAR.OFFAXIS_APRIORI VAR_DESCRIPTION=apriori NO2 (vertical) partial columns in the retrieved layers (off-axis) VAR_NOTES= VAR_DATA_TYPE=REAL VAR_DIMENSION=2 VAR_SIZE=13;35 VAR_DEPEND=ALTITUDE;DATETIME VAR_UNITS=Pmolec cm-2 VAR_SI_CONVERSION=0; 1.660539E-5; mol m-2 VAR_VALID_MIN=0.00E+00 VAR_VALID_MAX=1.00E+03 VAR_AVG_TYPE=NONE VAR_FILL_VALUE=-9.0000E+004 ! VIS_LABEL=apriori NO2 partial column (1E15 molec cm-2) (off-axis) VIS_FORMAT=E12.4 VIS_PLOT_TYPE=XY.PROFILE VIS_SCALE_TYPE=LINEAR;INCREASE VIS_SCALE_MIN=0.00E+00 VIS_SCALE_MAX=1.00E+03 !