HDF4 file: 1744 data descriptors
library version = "HDF Version 4.2 Release 11, February 5, 2015"
vgroup "groundbased_ftir.ch4_ulg003_jungfraujoch_20260808t052112z_20260826t092213z_001.hdf" class "CDF0.0"
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	vgroup "fakeDim70" class "Dim0.0"
		vdata "fakeDim70" class "DimVal0.1": fields Values; 1 records
	vgroup "DATETIME" class "Var0.0"
		attribute VAR_NAME = "DATETIME"
		attribute VAR_DESCRIPTION = "in UT (MJD2K is 0.000000 on 01-Jan-2000, at 00:00:00 UTC)"
		attribute VAR_NOTES = "Mean of the zero path difference times of the individual scans which were averaged to produce the fitted spectrum"
		attribute VAR_SIZE = "98"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_DATA_TYPE = "DOUBLE"
		attribute VAR_UNITS = "MJD2K"
		attribute VAR_SI_CONVERSION = "0.0;86400.0;s"
		attribute VAR_VALID_MIN = -5500.0
		attribute VAR_VALID_MAX = 10000.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = -5500.0, 10000.0
		attribute units = "MJD2K"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "INTEGRATION.TIME" class "Var0.0"
		attribute VAR_NAME = "INTEGRATION.TIME"
		attribute VAR_DESCRIPTION = " Total time duration of the spectral measurement"
		attribute VAR_NOTES = " "
		attribute VAR_SIZE = "98"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "s"
		attribute VAR_SI_CONVERSION = "0.0;1.0;s"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 21600.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 21600.0
		attribute units = "s"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "LATITUDE.INSTRUMENT" class "Var0.0"
		attribute VAR_NAME = "LATITUDE.INSTRUMENT"
		attribute VAR_DESCRIPTION = "Latitude in decimal degrees"
		attribute VAR_NOTES = "Latitude (North) of the ground-based instrument"
		attribute VAR_SIZE = "1"
		attribute VAR_DEPEND = "CONSTANT"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "deg"
		attribute VAR_SI_CONVERSION = "0.0;1.74533E-2;rad"
		attribute VAR_VALID_MIN = -90.0
		attribute VAR_VALID_MAX = 90.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = -90.0, 90.0
		attribute units = "deg"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "LONGITUDE.INSTRUMENT" class "Var0.0"
		attribute VAR_NAME = "LONGITUDE.INSTRUMENT"
		attribute VAR_DESCRIPTION = "Longitude in decimal degrees"
		attribute VAR_NOTES = "Longitude (East) of the ground-based instrument"
		attribute VAR_SIZE = "1"
		attribute VAR_DEPEND = "CONSTANT"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "deg"
		attribute VAR_SI_CONVERSION = "0.0;1.74533E-2;rad"
		attribute VAR_VALID_MIN = -180.0
		attribute VAR_VALID_MAX = 180.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = -180.0, 180.0
		attribute units = "deg"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "ALTITUDE.INSTRUMENT" class "Var0.0"
		attribute VAR_NAME = "ALTITUDE.INSTRUMENT"
		attribute VAR_DESCRIPTION = "Site altitude in m"
		attribute VAR_NOTES = " "
		attribute VAR_SIZE = "1"
		attribute VAR_DEPEND = "CONSTANT"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "m"
		attribute VAR_SI_CONVERSION = "0.0;1.0;m"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 4000.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 4000.0
		attribute units = "m"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "SURFACE.PRESSURE_INDEPENDENT" class "Var0.0"
		attribute VAR_NAME = "SURFACE.PRESSURE_INDEPENDENT"
		attribute VAR_DESCRIPTION = "Air pressure at ground level"
		attribute VAR_NOTES = "Closest (in time) available measurement at the Jungfraujoch station (6 pressure measurements available per hour)"
		attribute VAR_SIZE = "98"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "hPa"
		attribute VAR_SI_CONVERSION = "0.0;1.0E2;kg m-1 s-2"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 1100.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 1100.0
		attribute units = "hPa"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "SURFACE.PRESSURE_INDEPENDENT_SOURCE" class "Var0.0"
		attribute VAR_NAME = "SURFACE.PRESSURE_INDEPENDENT_SOURCE"
		attribute VAR_DESCRIPTION = "Air pressure at ground level source"
		attribute VAR_NOTES = "Data provider for surface air pressure"
		attribute VAR_SIZE = "1"
		attribute VAR_DEPEND = "CONSTANT"
		attribute VAR_DATA_TYPE = "STRING"
		attribute VAR_UNITS = " "
		attribute VAR_SI_CONVERSION = " "
		attribute VAR_VALID_MIN = " "
		attribute VAR_VALID_MAX = " "
		attribute VAR_FILL_VALUE = " "
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "SURFACE.TEMPERATURE_INDEPENDENT" class "Var0.0"
		attribute VAR_NAME = "SURFACE.TEMPERATURE_INDEPENDENT"
		attribute VAR_DESCRIPTION = "Air temperature at ground level"
		attribute VAR_NOTES = "Closest (in time) available measurement at the Jungfraujoch station (6 temperature measurements available per hour)"
		attribute VAR_SIZE = "98"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "K"
		attribute VAR_SI_CONVERSION = "0.0;1.0;K"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 500.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 500.0
		attribute units = "K"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "SURFACE.TEMPERATURE_INDEPENDENT_SOURCE" class "Var0.0"
		attribute VAR_NAME = "SURFACE.TEMPERATURE_INDEPENDENT_SOURCE"
		attribute VAR_DESCRIPTION = "Air temperature at ground level source"
		attribute VAR_NOTES = "Data provider for surface air temperature"
		attribute VAR_SIZE = "1"
		attribute VAR_DEPEND = "CONSTANT"
		attribute VAR_DATA_TYPE = "STRING"
		attribute VAR_UNITS = " "
		attribute VAR_SI_CONVERSION = " "
		attribute VAR_VALID_MIN = " "
		attribute VAR_VALID_MAX = " "
		attribute VAR_FILL_VALUE = " "
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "HUMIDITY.RELATIVE.SURFACE_INDEPENDENT" class "Var0.0"
		attribute VAR_NAME = "HUMIDITY.RELATIVE.SURFACE_INDEPENDENT"
		attribute VAR_DESCRIPTION = "Relative humidity 2m above the ground"
		attribute VAR_NOTES = " "
		attribute VAR_SIZE = "98"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "%"
		attribute VAR_SI_CONVERSION = "0.0;0.01;1"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 101.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 101.0
		attribute units = "%"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "HUMIDITY.RELATIVE.SURFACE_INDEPENDENT_SOURCE" class "Var0.0"
		attribute VAR_NAME = "HUMIDITY.RELATIVE.SURFACE_INDEPENDENT_SOURCE"
		attribute VAR_DESCRIPTION = "Source for relative humidity"
		attribute VAR_NOTES = "Data provider for relative humidity"
		attribute VAR_SIZE = "1"
		attribute VAR_DEPEND = "CONSTANT"
		attribute VAR_DATA_TYPE = "STRING"
		attribute VAR_UNITS = " "
		attribute VAR_SI_CONVERSION = " "
		attribute VAR_VALID_MIN = " "
		attribute VAR_VALID_MAX = " "
		attribute VAR_FILL_VALUE = " "
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "WIND.DIRECTION.SURFACE_INDEPENDENT" class "Var0.0"
		attribute VAR_NAME = "WIND.DIRECTION.SURFACE_INDEPENDENT"
		attribute VAR_DESCRIPTION = "Wind direction at the station"
		attribute VAR_NOTES = "Using WMO definition (wind from the north is 360; from the east is 90 etc. No wind is 0)"
		attribute VAR_SIZE = "98"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "deg"
		attribute VAR_SI_CONVERSION = "0.0;1.74533E-2;rad"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 360.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 360.0
		attribute units = "deg"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "WIND.DIRECTION.SURFACE_INDEPENDENT_SOURCE" class "Var0.0"
		attribute VAR_NAME = "WIND.DIRECTION.SURFACE_INDEPENDENT_SOURCE"
		attribute VAR_DESCRIPTION = "Source for wind direction"
		attribute VAR_NOTES = "Data provider for wind direction"
		attribute VAR_SIZE = "1"
		attribute VAR_DEPEND = "CONSTANT"
		attribute VAR_DATA_TYPE = "STRING"
		attribute VAR_UNITS = " "
		attribute VAR_SI_CONVERSION = " "
		attribute VAR_VALID_MIN = " "
		attribute VAR_VALID_MAX = " "
		attribute VAR_FILL_VALUE = " "
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "WIND.SPEED.SURFACE_INDEPENDENT" class "Var0.0"
		attribute VAR_NAME = "WIND.SPEED.SURFACE_INDEPENDENT"
		attribute VAR_DESCRIPTION = "Wind speed at the station"
		attribute VAR_NOTES = " "
		attribute VAR_SIZE = "98"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "m s-1"
		attribute VAR_SI_CONVERSION = "0.0;1.0;m s-1"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 100.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 100.0
		attribute units = "m s-1"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "WIND.SPEED.SURFACE_INDEPENDENT_SOURCE" class "Var0.0"
		attribute VAR_NAME = "WIND.SPEED.SURFACE_INDEPENDENT_SOURCE"
		attribute VAR_DESCRIPTION = "Source for wind speed"
		attribute VAR_NOTES = "Data provider for wind speed"
		attribute VAR_SIZE = "1"
		attribute VAR_DEPEND = "CONSTANT"
		attribute VAR_DATA_TYPE = "STRING"
		attribute VAR_UNITS = " "
		attribute VAR_SI_CONVERSION = " "
		attribute VAR_VALID_MIN = " "
		attribute VAR_VALID_MAX = " "
		attribute VAR_FILL_VALUE = " "
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "ALTITUDE" class "Var0.0"
		attribute VAR_NAME = "ALTITUDE"
		attribute VAR_DESCRIPTION = "Altitude grid used in the retrievals and archiving"
		attribute VAR_NOTES = " Reported altitude levels are the centers of the retrieval layers, i.e. the geometric mean between the two layer boundaries provided in the ALTITUDE.BOUNDARIES matrix."
		attribute VAR_SIZE = "41"
		attribute VAR_DEPEND = "ALTITUDE"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "km"
		attribute VAR_SI_CONVERSION = "0.0;1.0E3;m"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 120.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 120.0
		attribute units = "km"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "ALTITUDE.BOUNDARIES" class "Var0.0"
		attribute VAR_NAME = "ALTITUDE.BOUNDARIES"
		attribute VAR_DESCRIPTION = " Layer boundaries for each retrieval layer, as a 2D matrix"
		attribute VAR_NOTES = " The retrieved partial columns are computed between the boundaries provided in this table. The lowermost boundary is equal to ALTITUDE.INSTRUMENT."
		attribute VAR_SIZE = "41;2"
		attribute VAR_DEPEND = "ALTITUDE;INDEPENDENT"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "km"
		attribute VAR_SI_CONVERSION = "0.0;1.0E3;m"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 120.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 120.0
		attribute units = "km"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "PRESSURE_INDEPENDENT" class "Var0.0"
		attribute VAR_NAME = "PRESSURE_INDEPENDENT"
		attribute VAR_DESCRIPTION = " a priori total air pressures adopted in the retrievals"
		attribute VAR_NOTES = "Based on daily physical models. Pressure is considered homogeneous in the corresponding retrieval layer."
		attribute VAR_SIZE = "98;41"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "hPa"
		attribute VAR_SI_CONVERSION = "0.0;1.0E2;kg m-1 s-2"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 1100.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 1100.0
		attribute units = "hPa"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "PRESSURE_INDEPENDENT_SOURCE" class "Var0.0"
		attribute VAR_NAME = "PRESSURE_INDEPENDENT_SOURCE"
		attribute VAR_DESCRIPTION = "Source for pressure profile"
		attribute VAR_NOTES = "Source for pressure profile"
		attribute VAR_SIZE = "1"
		attribute VAR_DEPEND = "CONSTANT"
		attribute VAR_DATA_TYPE = "STRING"
		attribute VAR_UNITS = " "
		attribute VAR_SI_CONVERSION = " "
		attribute VAR_VALID_MIN = " "
		attribute VAR_VALID_MAX = " "
		attribute VAR_FILL_VALUE = " "
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "TEMPERATURE_INDEPENDENT" class "Var0.0"
		attribute VAR_NAME = "TEMPERATURE_INDEPENDENT"
		attribute VAR_DESCRIPTION = " a priori air temperatures adopted in the retrievals"
		attribute VAR_NOTES = "Based on daily physical models. Temperature is considered homogeneous in the corresponding retrieval layer."
		attribute VAR_SIZE = "98;41"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "K"
		attribute VAR_SI_CONVERSION = "0.0;1.0;K"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 500.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 500.0
		attribute units = "K"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "TEMPERATURE_INDEPENDENT_SOURCE" class "Var0.0"
		attribute VAR_NAME = "TEMPERATURE_INDEPENDENT_SOURCE"
		attribute VAR_DESCRIPTION = "Source for temperature profile"
		attribute VAR_NOTES = "Source for temperature profile"
		attribute VAR_SIZE = "1"
		attribute VAR_DEPEND = "CONSTANT"
		attribute VAR_DATA_TYPE = "STRING"
		attribute VAR_UNITS = " "
		attribute VAR_SI_CONVERSION = " "
		attribute VAR_VALID_MIN = " "
		attribute VAR_VALID_MAX = " "
		attribute VAR_FILL_VALUE = " "
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "DRY.AIR.COLUMN.PARTIAL_INDEPENDENT" class "Var0.0"
		attribute VAR_NAME = "DRY.AIR.COLUMN.PARTIAL_INDEPENDENT"
		attribute VAR_DESCRIPTION = " Vertical air column densities"
		attribute VAR_NOTES = "For conversion between vmr and partial columns."
		attribute VAR_SIZE = "98;41"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "Zmolec cm-2"
		attribute VAR_SI_CONVERSION = "0.0;1.66054E1;mol m-2"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 1.19999997e+24
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 1.19999997e+24
		attribute units = "Zmolec cm-2"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "DRY.AIR.COLUMN.PARTIAL_INDEPENDENT_SOURCE" class "Var0.0"
		attribute VAR_NAME = "DRY.AIR.COLUMN.PARTIAL_INDEPENDENT_SOURCE"
		attribute VAR_DESCRIPTION = "Source for partial air columns"
		attribute VAR_NOTES = "Source for partial air columns"
		attribute VAR_SIZE = "1"
		attribute VAR_DEPEND = "CONSTANT"
		attribute VAR_DATA_TYPE = "STRING"
		attribute VAR_UNITS = " "
		attribute VAR_SI_CONVERSION = " "
		attribute VAR_VALID_MIN = " "
		attribute VAR_VALID_MAX = " "
		attribute VAR_FILL_VALUE = " "
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "CH4.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR" class "Var0.0"
		attribute VAR_NAME = "CH4.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR"
		attribute VAR_DESCRIPTION = " Retrieved individual vertical distribution of CH4 (vmr units)"
		attribute VAR_NOTES = " Profile information was retrieved using 6 microwindows and HITRAN2008."
		attribute VAR_SIZE = "98;41"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "ppmv"
		attribute VAR_SI_CONVERSION = "0.0;1.0E-6;1"
		attribute VAR_VALID_MIN = -1.0
		attribute VAR_VALID_MAX = 3.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = -1.0, 3.0
		attribute units = "ppmv"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "CH4.MIXING.RATIO.VOLUME.DRY_APRIORI" class "Var0.0"
		attribute VAR_NAME = "CH4.MIXING.RATIO.VOLUME.DRY_APRIORI"
		attribute VAR_DESCRIPTION = "CH4 a priori vertical distribution (vmr units) used in all retrievals reported here"
		attribute VAR_NOTES = "Mean of the 1980-2020 Whole Atmosphere Community Climate Model (WACCM) v6 predictions for the Jungfraujoch station for the target and interfering species."
		attribute VAR_SIZE = "98;41"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "ppmv"
		attribute VAR_SI_CONVERSION = "0.0;1.0E-6;1"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 3.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 3.0
		attribute units = "ppmv"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "CH4.MIXING.RATIO.VOLUME.DRY_APRIORI.SOURCE" class "Var0.0"
		attribute VAR_NAME = "CH4.MIXING.RATIO.VOLUME.DRY_APRIORI.SOURCE"
		attribute VAR_DESCRIPTION = "Source for CH4 a priori profile"
		attribute VAR_NOTES = "Mean of the 1980-2020 Whole Atmosphere Community Climate Model (WACCM) v6 predictions for the Jungfraujoch station."
		attribute VAR_SIZE = "1"
		attribute VAR_DEPEND = "CONSTANT"
		attribute VAR_DATA_TYPE = "STRING"
		attribute VAR_UNITS = " "
		attribute VAR_SI_CONVERSION = " "
		attribute VAR_VALID_MIN = " "
		attribute VAR_VALID_MAX = " "
		attribute VAR_FILL_VALUE = " "
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "CH4.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR_AVK" class "Var0.0"
		attribute VAR_NAME = "CH4.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR_AVK"
		attribute VAR_DESCRIPTION = " Averaging kernel matrix of the retrieved CH4 vmr vertical distributions"
		attribute VAR_NOTES = "Matrix elements are listed row after row (e.g. the second index relative to the row number is increasing first and the sequence is therefore as follows: C(1,1), C(1,2), C(1,3), ../.., C(1,41), C(2,1), ../.., C(41,41)). First three values of the initial averaging kernel for the first measurement are: 0.166406 0.161050 0.150584"
		attribute VAR_SIZE = "98;41;41"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE;ALTITUDE"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "1"
		attribute VAR_SI_CONVERSION = "0.0;1.0;1"
		attribute VAR_VALID_MIN = -2.0
		attribute VAR_VALID_MAX = 2.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = -2.0, 2.0
		attribute units = "1"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "CH4.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR_UNCERTAINTY.RANDOM.COVARIANCE" class "Var0.0"
		attribute VAR_NAME = "CH4.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR_UNCERTAINTY.RANDOM.COVARIANCE"
		attribute VAR_DESCRIPTION = " error covariance matrix (Sx) of the retrieved CH4 vertical distributions (vmr units)"
		attribute VAR_NOTES = "WARNING: The smoothing error is not included here."
		attribute VAR_SIZE = "98;41;41"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE;ALTITUDE"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "ppmv2"
		attribute VAR_SI_CONVERSION = "0.0;1.0E-12;1"
		attribute VAR_VALID_MIN = -4.0
		attribute VAR_VALID_MAX = 4.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = -4.0, 4.0
		attribute units = "ppmv2"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "CH4.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR_UNCERTAINTY.SYSTEMATIC.COVARIANCE" class "Var0.0"
		attribute VAR_NAME = "CH4.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR_UNCERTAINTY.SYSTEMATIC.COVARIANCE"
		attribute VAR_DESCRIPTION = " systematic error covariance matrix associated with the retrieved vertical profiles of CH4, in VMR units"
		attribute VAR_NOTES = " "
		attribute VAR_SIZE = "98;41;41"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE;ALTITUDE"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "ppmv2"
		attribute VAR_SI_CONVERSION = "0.0;1.0E-12;1"
		attribute VAR_VALID_MIN = -2.0
		attribute VAR_VALID_MAX = 2.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = -2.0, 2.0
		attribute units = "ppmv2"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "CH4.COLUMN.PARTIAL_ABSORPTION.SOLAR" class "Var0.0"
		attribute VAR_NAME = "CH4.COLUMN.PARTIAL_ABSORPTION.SOLAR"
		attribute VAR_DESCRIPTION = " retrieved CH4 (vertical) partial columns in the individual layers"
		attribute VAR_NOTES = " partial columns are computed using a priori pressure and temperature values from NCEP"
		attribute VAR_SIZE = "98;41"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "Pmolec cm-2"
		attribute VAR_SI_CONVERSION = "0.0;1.66054E-5;mol m-2"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 5000.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 5000.0
		attribute units = "Pmolec cm-2"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "CH4.COLUMN.PARTIAL_APRIORI" class "Var0.0"
		attribute VAR_NAME = "CH4.COLUMN.PARTIAL_APRIORI"
		attribute VAR_DESCRIPTION = " a priori CH4 (vertical) partial columns in the individual layers"
		attribute VAR_NOTES = " partial columns are computed using a priori pressure and temperature values from NCEP"
		attribute VAR_SIZE = "98;41"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "Pmolec cm-2"
		attribute VAR_SI_CONVERSION = "0.0;1.66054E-5;mol m-2"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 5000.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 5000.0
		attribute units = "Pmolec cm-2"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "CH4.COLUMN_ABSORPTION.SOLAR" class "Var0.0"
		attribute VAR_NAME = "CH4.COLUMN_ABSORPTION.SOLAR"
		attribute VAR_DESCRIPTION = "retrieved CH4 total vertical column above Jungfraujoch "
		attribute VAR_NOTES = " "
		attribute VAR_SIZE = "98"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "Emolec cm-2"
		attribute VAR_SI_CONVERSION = "0.0;1.66054E-2;mol m-2"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 30.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 30.0
		attribute units = "Emolec cm-2"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "CH4.COLUMN_APRIORI" class "Var0.0"
		attribute VAR_NAME = "CH4.COLUMN_APRIORI"
		attribute VAR_DESCRIPTION = "CH4 a priori total vertical column  "
		attribute VAR_NOTES = " "
		attribute VAR_SIZE = "98"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "Emolec cm-2"
		attribute VAR_SI_CONVERSION = "0.0;1.66054E-2;mol m-2"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 30.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 30.0
		attribute units = "Emolec cm-2"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "CH4.COLUMN_ABSORPTION.SOLAR_AVK" class "Var0.0"
		attribute VAR_NAME = "CH4.COLUMN_ABSORPTION.SOLAR_AVK"
		attribute VAR_DESCRIPTION = " total vertical column averaging kernel for CH4"
		attribute VAR_NOTES = " This averaging kernel multiplies the partial column vector in order to get smoothed total column"
		attribute VAR_SIZE = "98;41"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "1"
		attribute VAR_SI_CONVERSION = "0.0;1.0;1"
		attribute VAR_VALID_MIN = -0.5
		attribute VAR_VALID_MAX = 2.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = -0.5, 2.0
		attribute units = "1"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "CH4.COLUMN_ABSORPTION.SOLAR_UNCERTAINTY.RANDOM.STANDARD" class "Var0.0"
		attribute VAR_NAME = "CH4.COLUMN_ABSORPTION.SOLAR_UNCERTAINTY.RANDOM.STANDARD"
		attribute VAR_DESCRIPTION = "random uncertainty on the retrieved total vertical columns of CH4"
		attribute VAR_NOTES = " "
		attribute VAR_SIZE = "98"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "Emolec cm-2"
		attribute VAR_SI_CONVERSION = "0.0;1.66054E-2;mol m-2"
		attribute VAR_VALID_MIN = 0.100000001
		attribute VAR_VALID_MAX = 1.5
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.100000001, 1.5
		attribute units = "Emolec cm-2"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "CH4.COLUMN_ABSORPTION.SOLAR_UNCERTAINTY.SYSTEMATIC.STANDARD" class "Var0.0"
		attribute VAR_NAME = "CH4.COLUMN_ABSORPTION.SOLAR_UNCERTAINTY.SYSTEMATIC.STANDARD"
		attribute VAR_DESCRIPTION = "systematic uncertainty on the retrieved total vertical columns of CH4"
		attribute VAR_NOTES = " "
		attribute VAR_SIZE = "98"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "Emolec cm-2"
		attribute VAR_SI_CONVERSION = "0.0;1.66054E-2;mol m-2"
		attribute VAR_VALID_MIN = 0.300000012
		attribute VAR_VALID_MAX = 1.5
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.300000012, 1.5
		attribute units = "Emolec cm-2"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "ANGLE.SOLAR_ZENITH.ASTRONOMICAL" class "Var0.0"
		attribute VAR_NAME = "ANGLE.SOLAR_ZENITH.ASTRONOMICAL"
		attribute VAR_DESCRIPTION = "Astronomical solar zenith angle in decimal deg "
		attribute VAR_NOTES = " "
		attribute VAR_SIZE = "98"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "deg"
		attribute VAR_SI_CONVERSION = "0.0;1.74533E-2;rad"
		attribute VAR_VALID_MIN = 15.0
		attribute VAR_VALID_MAX = 95.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 15.0, 95.0
		attribute units = "deg"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "ANGLE.SOLAR_AZIMUTH" class "Var0.0"
		attribute VAR_NAME = "ANGLE.SOLAR_AZIMUTH"
		attribute VAR_DESCRIPTION = "azimuth angle of the sun (O at North, increasing clockwise)"
		attribute VAR_NOTES = "in solar absorption mode, the sun defines the line of sight"
		attribute VAR_SIZE = "98"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "deg"
		attribute VAR_SI_CONVERSION = "0.0;1.74533E-2;rad"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 360.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 360.0
		attribute units = "deg"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "LATITUDE_LOS" class "Var0.0"
		attribute VAR_NAME = "LATITUDE_LOS"
		attribute VAR_DESCRIPTION = "Latitude along the line of sight"
		attribute VAR_NOTES = "Positive for North; in decimal degrees "
		attribute VAR_SIZE = "98;41"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "deg"
		attribute VAR_SI_CONVERSION = "0.0;1.74533E-2;rad"
		attribute VAR_VALID_MIN = -90.0
		attribute VAR_VALID_MAX = 90.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = -90.0, 90.0
		attribute units = "deg"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "LONGITUDE_LOS" class "Var0.0"
		attribute VAR_NAME = "LONGITUDE_LOS"
		attribute VAR_DESCRIPTION = "Longitude along the line of sight"
		attribute VAR_NOTES = "Positive for East; in decimal degrees"
		attribute VAR_SIZE = "98;41"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "deg"
		attribute VAR_SI_CONVERSION = "0.0;1.74533E-2;rad"
		attribute VAR_VALID_MIN = -180.0
		attribute VAR_VALID_MAX = 180.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = -180.0, 180.0
		attribute units = "deg"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "H2O.MIXING.RATIO.VOLUME.DRY_APRIORI" class "Var0.0"
		attribute VAR_NAME = "H2O.MIXING.RATIO.VOLUME.DRY_APRIORI"
		attribute VAR_DESCRIPTION = " a priori vertical profile of H2O, in VMR units"
		attribute VAR_NOTES = " "
		attribute VAR_SIZE = "98;41"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "ppmv"
		attribute VAR_SI_CONVERSION = "0.0;1.0E-6;1"
		attribute VAR_VALID_MIN = -1.0
		attribute VAR_VALID_MAX = 20000.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = -1.0, 20000.0
		attribute units = "ppmv"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "H2O.MIXING.RATIO.VOLUME.DRY_APRIORI.SOURCE" class "Var0.0"
		attribute VAR_NAME = "H2O.MIXING.RATIO.VOLUME.DRY_APRIORI.SOURCE"
		attribute VAR_DESCRIPTION = "Source for a priori vertical profile of H2O"
		attribute VAR_NOTES = " "
		attribute VAR_SIZE = "1"
		attribute VAR_DEPEND = "CONSTANT"
		attribute VAR_DATA_TYPE = "STRING"
		attribute VAR_UNITS = " "
		attribute VAR_SI_CONVERSION = " "
		attribute VAR_VALID_MIN = " "
		attribute VAR_VALID_MAX = " "
		attribute VAR_FILL_VALUE = " "
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "H2O.COLUMN_APRIORI" class "Var0.0"
		attribute VAR_NAME = "H2O.COLUMN_APRIORI"
		attribute VAR_DESCRIPTION = " a priori total vertical column of H2O"
		attribute VAR_NOTES = " "
		attribute VAR_SIZE = "98"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_UNITS = "Zmolec cm-2"
		attribute VAR_SI_CONVERSION = "0.0;1.66054E1;mol m-2"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 200.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 200.0
		attribute units = "Zmolec cm-2"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	attribute PI_NAME = "Mahieu;Emmanuel"
	attribute PI_AFFILIATION = "University of Liege;ULG"
	attribute PI_ADDRESS = "Quartier Agora - Allee du 6 aout, 19;B-4000 Liege;BELGIUM"
	attribute PI_EMAIL = "emmanuel.mahieu@ulg.ac.be"
	attribute DO_NAME = "Mahieu;Emmanuel"
	attribute DO_AFFILIATION = "University of Liege;ULG"
	attribute DO_ADDRESS = "Quartier Agora - Allee du 6 aout, 19;B-4000 Liege;BELGIUM"
	attribute DO_EMAIL = "emmanuel.mahieu@ulg.ac.be"
	attribute DS_NAME = "Mahieu;Emmanuel"
	attribute DS_AFFILIATION = "University of Liege;ULG"
	attribute DS_ADDRESS = "Quartier Agora - Allee du 6 aout, 19;B-4000 Liege;BELGIUM"
	attribute DS_EMAIL = "emmanuel.mahieu@ulg.ac.be"
	attribute DATA_DESCRIPTION = "individual vmr vertical profile of CH4 retrieved from FTIR high-resolution spectra recorded under clear sky conditions at the Jungfraujoch station with the Bruker 125HR."
	attribute DATA_DISCIPLINE = "ATMOSPHERIC.PHYSICS;REMOTE.SENSING;GROUNDBASED"
	attribute DATA_GROUP = "EXPERIMENTAL;PROFILE.STATIONARY"
	attribute DATA_LOCATION = "JUNGFRAUJOCH"
	attribute DATA_SOURCE = "FTIR.CH4_ULG003"
	attribute DATA_VARIABLES = "DATETIME;INTEGRATION.TIME;LATITUDE.INSTRUMENT;LONGITUDE.INSTRUMENT;ALTITUDE.INSTRUMENT;SURFACE.PRESSURE_INDEPENDENT;SURFACE.PRESSURE_INDEPENDENT_SOURCE;SURFACE.TEMPERATURE_INDEPENDENT;SURFACE.TEMPERATURE_INDEPENDENT_SOURCE;HUMIDITY.RELATIVE.SURFACE_INDEPENDENT;HUMIDITY.RELATIVE.SURFACE_INDEPENDENT_SOURCE;WIND.DIRECTION.SURFACE_INDEPENDENT;WIND.DIRECTION.SURFACE_INDEPENDENT_SOURCE;WIND.SPEED.SURFACE_INDEPENDENT;WIND.SPEED.SURFACE_INDEPENDENT_SOURCE;ALTITUDE;ALTITUDE.BOUNDARIES;PRESSURE_INDEPENDENT;PRESSURE_INDEPENDENT_SOURCE;TEMPERATURE_INDEPENDENT;TEMPERATURE_INDEPENDENT_SOURCE;DRY.AIR.COLUMN.PARTIAL_INDEPENDENT;DRY.AIR.COLUMN.PARTIAL_INDEPENDENT_SOURCE;CH4.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR;CH4.MIXING.RATIO.VOLUME.DRY_APRIORI;CH4.MIXING.RATIO.VOLUME.DRY_APRIORI.SOURCE;CH4.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR_AVK;CH4.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR_UNCERTAINTY.RANDOM.COVARIANCE;CH4.MIXING.RATIO.VOLUME.DRY_ABSORPTION.SOLAR_UNCERTAINTY.SYSTEMATIC.COVARIANCE;CH4.COLUMN.PARTIAL_ABSORPTION.SOLAR;CH4.COLUMN.PARTIAL_APRIORI;CH4.COLUMN_ABSORPTION.SOLAR;CH4.COLUMN_APRIORI;CH4.COLUMN_ABSORPTION.SOLAR_AVK;CH4.COLUMN_ABSORPTION.SOLAR_UNCERTAINTY.RANDOM.STANDARD;CH4.COLUMN_ABSORPTION.SOLAR_UNCERTAINTY.SYSTEMATIC.STANDARD;ANGLE.SOLAR_ZENITH.ASTRONOMICAL;ANGLE.SOLAR_AZIMUTH;LATITUDE_LOS;LONGITUDE_LOS;H2O.MIXING.RATIO.VOLUME.DRY_APRIORI;H2O.MIXING.RATIO.VOLUME.DRY_APRIORI.SOURCE;H2O.COLUMN_APRIORI"
	attribute DATA_START_DATE = "20260808T052112Z"
	attribute DATA_STOP_DATE = "20260826T092213Z"
	attribute DATA_FILE_VERSION = "001"
	attribute DATA_MODIFICATIONS = "VERSION001, Data produced with SFIT-4. Archive compliant with version 003 of FTIR template (https://avdc.gsfc.nasa.gov/index.php?site=1440972024#current_template)"
	attribute DATA_CAVEATS = "Data generated within the frame of the Network for the Detection of Atmospheric Composition Change (NDACC)"
	attribute DATA_RULES_OF_USE = "Data provided in support to the EU CAMS service (see https://atmosphere.copernicus.eu/) under the CC-By-SA (4.0) Creative Commons licence - The data users are invited to consider using consolidated data - Contact emmanuel.mahieu@uliege.be for more information."
	attribute DATA_ACKNOWLEDGEMENT = "Thanks to HFS-Jungfraujoch, F.R.S.-FNRS, METEOSWISS and the GAW-CH research programme and UNIVERSITE DE LIEGE for their respective support. We also thank NCEP for providing the daily zpt physical models used in the retrievals."
	attribute DATA_QUALITY = " RD - Rapid Delivery data produced in support to the CAMS service (see https://atmosphere.copernicus.eu/) - Data screening is not performed and some ancillary parameters might be not be optimum in this release !!"
	attribute DATA_TEMPLATE = "GEOMS-TE-FTIR-003"
	attribute DATA_PROCESSOR = "SFIT4,version 1.0.21"
	attribute FILE_NAME = "groundbased_ftir.ch4_ulg003_jungfraujoch_20260808t052112z_20260826t092213z_001.hdf"
	attribute FILE_GENERATION_DATE = "20260902T085606Z"
	attribute FILE_ACCESS = "NDACC"
	attribute FILE_PROJECT_ID = "CAMS27"
	attribute FILE_DOI = " "
	attribute FILE_ASSOCIATION = "Network for the Detection of Atmospheric Composition Change (NDACC)"
	attribute FILE_META_VERSION = "04R112;IDLCR8HDF"