HDF4 file: 1152 data descriptors
library version = "HDF Version 4.2 Release 11, February 5, 2015"
vgroup "./rd_hdf_files/groundbased_ftir.h2co_niwa006_lauder_20260731t230149z_20260828t045522z_001.hdf" class "CDF0.0"
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	vgroup "DATETIME" class "Var0.0"
		attribute VAR_NAME = "DATETIME"
		attribute VAR_DESCRIPTION = "Datetime correlates to an individual spectra (MJD2000 format). MJD2000 is the number of days since 00:00 UT 1/1/2000. It is the datetime of the average ZPD crossing point of the individual scans of the spectra."
		attribute VAR_NOTES = "NONE"
		attribute VAR_SIZE = "83"
		attribute VAR_DATA_TYPE = "DOUBLE"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_UNITS = "MJD2K"
		attribute VAR_SI_CONVERSION = "0.0;86400.0;s"
		attribute VAR_VALID_MIN = -10000.0
		attribute VAR_VALID_MAX = 10000.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = -10000.0, 10000.0
		attribute units = "MJD2K"
		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 North (decimal degrees) of the location of the instrument"
		attribute VAR_NOTES = "NONE"
		attribute VAR_SIZE = "1"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "CONSTANT"
		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 East (decimal degrees) of the location of the instrument"
		attribute VAR_NOTES = "NONE"
		attribute VAR_SIZE = "1"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "CONSTANT"
		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 = "altitude of the location of the instrument"
		attribute VAR_NOTES = "Altitude in kilometers"
		attribute VAR_SIZE = "1"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "CONSTANT"
		attribute VAR_UNITS = "km"
		attribute VAR_SI_CONVERSION = "0.0;1.0E3;m"
		attribute VAR_VALID_MIN = -1.0
		attribute VAR_VALID_MAX = 2.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = -1.0, 2.0
		attribute units = "km"
		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 = "surface pressure measured at the observation site"
		attribute VAR_NOTES = (text block)
| Data obtained from the NIWA climate database: https://cliflo.niwa.co.nz/;
| Station details: Lauder Ews,5535,I59065,-45.04010,169.68419,375, located 200 metres from FTS.  FTS +6 metres alt;
| Sensor calibrated annually as part of network quality assurance;
		attribute VAR_SIZE = "83"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME"
		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 = 1300.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 1300.0
		attribute units = "hPa"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "SURFACE.TEMPERATURE_INDEPENDENT" class "Var0.0"
		attribute VAR_NAME = "SURFACE.TEMPERATURE_INDEPENDENT"
		attribute VAR_DESCRIPTION = "surface temperature measured at the observation site"
		attribute VAR_NOTES = (text block)
| Data obtained from the NIWA climate database: https://cliflo.niwa.co.nz/;
| Station details: Lauder Ews,5535,I59065,-45.04010,169.68419,375, located 200 metres from FTS. FTS +6 metres alt;
| Sensor calibrated annually as part of network quality assurance
		attribute VAR_SIZE = "83"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME"
		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 "ALTITUDE" class "Var0.0"
		attribute VAR_NAME = "ALTITUDE"
		attribute VAR_DESCRIPTION = "Vertical profile grid on which the retrieved target gas vmr (and apriori vmr), pressure and temperature layer values are reported"
		attribute VAR_NOTES = "The altitudes are the centre (geometric mean of layer boundaries) of the altitude layers"
		attribute VAR_SIZE = "47"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "ALTITUDE"
		attribute VAR_UNITS = "km"
		attribute VAR_SI_CONVERSION = "0.0;1.0E3;m"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 150.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 150.0
		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 = "2D matrix providing the layer boundaries used for vertical profile retrieval"
		attribute VAR_NOTES = "The retrieved partial columns are given between the boundaries. Retrieved total column is between uppermost and lowermost boundary limits"
		attribute VAR_SIZE = "2;47"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "INDEPENDENT;ALTITUDE"
		attribute VAR_UNITS = "km"
		attribute VAR_SI_CONVERSION = "0.0;1.0E3;m"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 150.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 150.0
		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 = "atmospheric pressure in the altitude layers"
		attribute VAR_NOTES = "Pressure profiles are from NCEP (http://www.ndsc.ncep.noaa.gov/cgi-bin/pi/profiles/profiles.pl). The pressure reported is for the centre of the altitude layers. Above 55km (0.4hPa) US Std Atm 76 is splint/splined onto the top of daily NCEP profile"
		attribute VAR_SIZE = "83;47"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE"
		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 = 1200.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 1200.0
		attribute units = "hPa"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "TEMPERATURE_INDEPENDENT" class "Var0.0"
		attribute VAR_NAME = "TEMPERATURE_INDEPENDENT"
		attribute VAR_DESCRIPTION = "atmospheric temperature in the altitude layers"
		attribute VAR_NOTES = "Temperature profiles are from NCEP (http://www.ndsc.ncep.noaa.gov/cgi-bin/pi/profiles/profiles.pl). The temperature reported is for the centre of the altitude layers. Above 55km (0.4hPa) US Std Atm 76 is splint/splined onto the daily NCEP profile"
		attribute VAR_SIZE = "83;47"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE"
		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 "H2CO.MIXING.RATIO.VOLUME_ABSORPTION.SOLAR_APRIORI" class "Var0.0"
		attribute VAR_NAME = "H2CO.MIXING.RATIO.VOLUME_ABSORPTION.SOLAR_APRIORI"
		attribute VAR_DESCRIPTION = "H2CO apriori vertical profile used in the retrieval (VMR units)"
		attribute VAR_NOTES = "CH2O WACCM V4 CESM REFC1.3 1980-2020 CCMVal/CCMI, 2012"
		attribute VAR_SIZE = "83;47"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE"
		attribute VAR_UNITS = "ppmv"
		attribute VAR_SI_CONVERSION = "0.0;1.0E-6;1"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 10000.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 10000.0
		attribute units = "ppmv"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "H2CO.COLUMN_ABSORPTION.SOLAR" class "Var0.0"
		attribute VAR_NAME = "H2CO.COLUMN_ABSORPTION.SOLAR"
		attribute VAR_DESCRIPTION = "H2CO: retrieved total vertical column at LAUDER (molec cm-2)."
		attribute VAR_NOTES = (text block)
| Retrieval codes: sfit4_v0944(OEM) https://wiki.ucar.edu/display/sfit4/SFIT+Core+Code;
| Instrument type: Bruker 125HR;
| Dataset variant: xxx;
| Spectral line-list: H2CO: Hitran_2012, O3,HDO,CH4: ATM15, N2O: Hitran_2012;
| Spectral window: 4 regions (cm-1): 2763.42-2764.17, 2765.65-2766.01, 2778.15-2779.1, 2780.65-2782.0;
| Interfering species: CH4 HDO O3 N2O;
| Spectra resolution: 0.0035cm-1 (257cm opd);
| Retrieval notes: Profile uncertainties: Tikhonov L1, alpha = 100, using altitude constrained regularization;
| Continuum slope fitted. Curvature not fitted;
| Apodization modulation efficiency and phase error set as ideal;
| Simple phase error not retrieved.;
| zshift not retreived. wshift retrieved.;
| Interrfering species: N2O column retrievals, HDO CH4 O3 : profile retrieval;
| Channelling fitting not required;
| SNR (Se_instrument) is fixed at 400. Diagonal matrice;
		attribute VAR_SIZE = "83"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_UNITS = "molec cm-2"
		attribute VAR_SI_CONVERSION = "0.0;1.66054E-20;mol m-2"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 9.99999956e+24
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 9.99999956e+24
		attribute units = "molec cm-2"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "H2CO.COLUMN_ABSORPTION.SOLAR_APRIORI" class "Var0.0"
		attribute VAR_NAME = "H2CO.COLUMN_ABSORPTION.SOLAR_APRIORI"
		attribute VAR_DESCRIPTION = "H2CO: apriori total vertical column at LAUDER (molec cm-2)"
		attribute VAR_NOTES = "CH2O WACCM V4 CESM REFC1.3 1980-2020 CCMVal/CCMI, 2012"
		attribute VAR_SIZE = "83"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_UNITS = "molec cm-2"
		attribute VAR_SI_CONVERSION = "0.0;1.66054E-20;mol m-2"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 9.99999956e+24
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 9.99999956e+24
		attribute units = "molec cm-2"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "H2CO.COLUMN_ABSORPTION.SOLAR_UNCERTAINTY.RANDOM.STANDARD" class "Var0.0"
		attribute VAR_NAME = "H2CO.COLUMN_ABSORPTION.SOLAR_UNCERTAINTY.RANDOM.STANDARD"
		attribute VAR_DESCRIPTION = "H2CO: Estimated total random uncertainty of the retrieved column. Does not include smoothing error"
		attribute VAR_NOTES = "Random uncertainties include: Temperature, SZA and measurement noise(from spectra SNR). Smoothing error is not included."
		attribute VAR_SIZE = "83"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_UNITS = "molec cm-2"
		attribute VAR_SI_CONVERSION = "0.0;1.66054E-20;mol m-2"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 9.99999956e+24
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 9.99999956e+24
		attribute units = "molec cm-2"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "H2CO.COLUMN_ABSORPTION.SOLAR_UNCERTAINTY.SYSTEMATIC.STANDARD" class "Var0.0"
		attribute VAR_NAME = "H2CO.COLUMN_ABSORPTION.SOLAR_UNCERTAINTY.SYSTEMATIC.STANDARD"
		attribute VAR_DESCRIPTION = "H2CO: Estimated total systematic uncertainty of the retrieved column. Does not include smoothing error"
		attribute VAR_NOTES = "Systematic uncertainties include the line parameters: Line strength, air broadened half-width and temperature dependence coefficient. These are sourced from the Hitran database. Smoothing error is not included"
		attribute VAR_SIZE = "83"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_UNITS = "molec cm-2"
		attribute VAR_SI_CONVERSION = "0.0;1.66054E-20;mol m-2"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 9.99999956e+24
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 9.99999956e+24
		attribute units = "molec 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 = "solar astronomical zenith angle. Calculated from the mean ZPD time of spectra collection (DATETIME)"
		attribute VAR_NOTES = "For both solar and lunar based observations, it defines line of sight. Atmospheric refraction not accounted for. (Decimal degrees)"
		attribute VAR_SIZE = "83"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_UNITS = "deg"
		attribute VAR_SI_CONVERSION = "0.0;1.74533E-2;rad"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 180.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 180.0
		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 = "solar azimuth angle (0-360 degrees, same as compass coordinates.). Calculated from the mean ZPD time of spectra collection (DATETIME)"
		attribute VAR_NOTES = "For both solar and lunar based observations 0.0 degree is North, 90.0 degrees is east, 270.0 is west, 180 is south. (Decimal degrees)"
		attribute VAR_SIZE = "83"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME"
		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 "H2O.COLUMN_ABSORPTION.SOLAR" class "Var0.0"
		attribute VAR_NAME = "H2O.COLUMN_ABSORPTION.SOLAR"
		attribute VAR_DESCRIPTION = "Retrieved total vertical column of the interferring species H2O in the retrieval (VMR units)."
		attribute VAR_NOTES = "NONE"
		attribute VAR_SIZE = "83"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME"
		attribute VAR_UNITS = "molec cm-2"
		attribute VAR_SI_CONVERSION = "0.0;1.66054E-20;mol m-2"
		attribute VAR_VALID_MIN = -9.99999956e+24
		attribute VAR_VALID_MAX = 4.99999992e+30
		attribute VAR_FILL_VALUE = -8.99999967e+26
		attribute valid_range = -9.99999956e+24, 4.99999992e+30
		attribute units = "molec cm-2"
		attribute _FillValue = -8.99999967e+26
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "H2O.MIXING.RATIO.VOLUME_ABSORPTION.SOLAR" class "Var0.0"
		attribute VAR_NAME = "H2O.MIXING.RATIO.VOLUME_ABSORPTION.SOLAR"
		attribute VAR_DESCRIPTION = "Retrieved vertical profile of the interferring species H2O in the retrieval (VMR units)."
		attribute VAR_NOTES = "H2O is not an interferring species in this retrieval. Not reported"
		attribute VAR_SIZE = "83;47"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE"
		attribute VAR_UNITS = "ppmv"
		attribute VAR_SI_CONVERSION = "0.0;1.0E-6;1"
		attribute VAR_VALID_MIN = -100000.0
		attribute VAR_VALID_MAX = 500000.0
		attribute VAR_FILL_VALUE = -900000.0
		attribute valid_range = -100000.0, 500000.0
		attribute units = "ppmv"
		attribute _FillValue = -900000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "H2CO.COLUMN_ABSORPTION.SOLAR_AVK" class "Var0.0"
		attribute VAR_NAME = "H2CO.COLUMN_ABSORPTION.SOLAR_AVK"
		attribute VAR_DESCRIPTION = "H2CO: total vertical column averaging kernel derived from mixing ratio averaging kernels"
		attribute VAR_NOTES = "The TC AVK is multiplied by the partial column vector (COLUMN.PARTIAL_ABSORPTION) to obtain the smoothed total column"
		attribute VAR_SIZE = "83;47"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE"
		attribute VAR_UNITS = "1"
		attribute VAR_SI_CONVERSION = "0.0;1.0;1"
		attribute VAR_VALID_MIN = -20.0
		attribute VAR_VALID_MAX = 20.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = -20.0, 20.0
		attribute units = "1"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "H2CO.MIXING.RATIO.VOLUME_ABSORPTION.SOLAR" class "Var0.0"
		attribute VAR_NAME = "H2CO.MIXING.RATIO.VOLUME_ABSORPTION.SOLAR"
		attribute VAR_DESCRIPTION = "H2CO retrieved vertical profile (VMR units)"
		attribute VAR_NOTES = (text block)
| Retrieval codes: sfit4_v0944(OEM) https://wiki.ucar.edu/display/sfit4/SFIT+Core+Code;
| Instrument type: Bruker 125HR;
| Dataset variant: xxx;
| Spectral line-list: H2CO: Hitran_2012, O3,HDO,CH4: ATM15, N2O: Hitran_2012;
| Spectral window: 4 regions (cm-1): 2763.42-2764.17, 2765.65-2766.01, 2778.15-2779.1, 2780.65-2782.0;
| Interfering species: CH4 HDO O3 N2O;
| Spectra resolution: 0.0035cm-1 (257cm opd);
| Retrieval notes: Profile uncertainties: Tikhonov L1, alpha = 100, using altitude constrained regularization;
| Continuum slope fitted. Curvature not fitted;
| Apodization modulation efficiency and phase error set as ideal;
| Simple phase error not retrieved.;
| zshift not retreived. wshift retrieved.;
| Interrfering species: N2O column retrievals, HDO CH4 O3 : profile retrieval;
| Channelling fitting not required;
| SNR (Se_instrument) is fixed at 400. Diagonal matrice;
		attribute VAR_SIZE = "83;47"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE"
		attribute VAR_UNITS = "ppmv"
		attribute VAR_SI_CONVERSION = "0.0;1.0E-6;1"
		attribute VAR_VALID_MIN = -3.0
		attribute VAR_VALID_MAX = 100.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = -3.0, 100.0
		attribute units = "ppmv"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "H2CO.MIXING.RATIO.VOLUME_ABSORPTION.SOLAR_AVK" class "Var0.0"
		attribute VAR_NAME = "H2CO.MIXING.RATIO.VOLUME_ABSORPTION.SOLAR_AVK"
		attribute VAR_DESCRIPTION = "H2CO averaging kernal (AVK) matrix for the retrieved vertical profile in VMR/VMR units"
		attribute VAR_NOTES = (text block)
| HDF AVK (and error covariance) ordering: [k,j,i]
| i = retrieval in file
| j = altitude layer
| k = AVK for altitude layer
| Example: avk values of the lowest three altitudes(k) for the bottom layer(j) of the first retrieval(i):
|      0.087651373      0.10158688      0.10901630
		attribute VAR_SIZE = "83;47;47"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE;ALTITUDE"
		attribute VAR_UNITS = "1"
		attribute VAR_SI_CONVERSION = "0.0;1.0;1"
		attribute VAR_VALID_MIN = -10000.0
		attribute VAR_VALID_MAX = 10000.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = -10000.0, 10000.0
		attribute units = "1"
		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 = "Duration of the interferograms (thus spectra) from which the profile has been retrieved."
		attribute VAR_NOTES = "Duration is dependent on spectral resolution, scanner velocity, scan direction and scan co-adding."
		attribute VAR_SIZE = "83"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME"
		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 "H2CO.MIXING.RATIO.VOLUME_ABSORPTION.SOLAR_UNCERTAINTY.RANDOM.COVARIANCE" class "Var0.0"
		attribute VAR_NAME = "H2CO.MIXING.RATIO.VOLUME_ABSORPTION.SOLAR_UNCERTAINTY.RANDOM.COVARIANCE"
		attribute VAR_DESCRIPTION = "H2CO: Total random error covariance matrix, associated with the retrieval profile in VMR x VMR units"
		attribute VAR_NOTES = "Random uncertainties include: Temperature, SZA and measurement noise(from spectra SNR). Smoothing error is not included."
		attribute VAR_SIZE = "83;47;47"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE;ALTITUDE"
		attribute VAR_UNITS = "ppmv2"
		attribute VAR_SI_CONVERSION = "0.0;1.0E-12;1"
		attribute VAR_VALID_MIN = -10000.0
		attribute VAR_VALID_MAX = 10000.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = -10000.0, 10000.0
		attribute units = "ppmv2"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "H2CO.MIXING.RATIO.VOLUME_ABSORPTION.SOLAR_UNCERTAINTY.SYSTEMATIC.COVARIANCE" class "Var0.0"
		attribute VAR_NAME = "H2CO.MIXING.RATIO.VOLUME_ABSORPTION.SOLAR_UNCERTAINTY.SYSTEMATIC.COVARIANCE"
		attribute VAR_DESCRIPTION = "H2CO: Total systematic error covariance matrix, associated with the retrieval profile, in VMR x VMR units."
		attribute VAR_NOTES = "Systematic uncertainties include the line parameters: Line strength, air broadened half-width and temperature dependence coefficient. These are sourced from the Hitran database. Smoothing error is not included"
		attribute VAR_SIZE = "83;47;47"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE;ALTITUDE"
		attribute VAR_UNITS = "ppmv2"
		attribute VAR_SI_CONVERSION = "0.0;1.0E-12;1"
		attribute VAR_VALID_MIN = -10000.0
		attribute VAR_VALID_MAX = 10000.0
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = -10000.0, 10000.0
		attribute units = "ppmv2"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "H2CO.COLUMN.PARTIAL_ABSORPTION.SOLAR" class "Var0.0"
		attribute VAR_NAME = "H2CO.COLUMN.PARTIAL_ABSORPTION.SOLAR"
		attribute VAR_DESCRIPTION = "H2CO retrieved vertical partial columns in the retrieval layers"
		attribute VAR_NOTES = "retrieved partial columns calculated using retrieved layer gas mixing ratio and apriori pressure and temperature (i.e. apriori airmass). Partial columns enclosed by reported altitude boundaries."
		attribute VAR_SIZE = "83;47"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE"
		attribute VAR_UNITS = "molec cm-2"
		attribute VAR_SI_CONVERSION = "0.0;1.66054E-20;mol m-2"
		attribute VAR_VALID_MIN = -3.39999988e+17
		attribute VAR_VALID_MAX = 1.00000002e+30
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = -3.39999988e+17, 1.00000002e+30
		attribute units = "molec cm-2"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	vgroup "H2CO.COLUMN.PARTIAL_ABSORPTION.SOLAR_APRIORI" class "Var0.0"
		attribute VAR_NAME = "H2CO.COLUMN.PARTIAL_ABSORPTION.SOLAR_APRIORI"
		attribute VAR_DESCRIPTION = "H2CO apriori vertical partial columns in the retrieval layers"
		attribute VAR_NOTES = "apriori partial columns calculated using apriori layer gas mixing ratio, pressure and temperature. Partial columns enclosed by altitude boundaries."
		attribute VAR_SIZE = "83;47"
		attribute VAR_DATA_TYPE = "REAL"
		attribute VAR_DEPEND = "DATETIME;ALTITUDE"
		attribute VAR_UNITS = "molec cm-2"
		attribute VAR_SI_CONVERSION = "0.0;1.66054E-20;mol m-2"
		attribute VAR_VALID_MIN = 0.0
		attribute VAR_VALID_MAX = 1.00000002e+30
		attribute VAR_FILL_VALUE = -90000.0
		attribute valid_range = 0.0, 1.00000002e+30
		attribute units = "molec cm-2"
		attribute _FillValue = -90000.0
		vdata "" class "SDSVar": fields SDS variable; 0 records
	attribute PI_NAME = "Smale;Daniel"
	attribute PI_AFFILIATION = "National Institute of Water and Atmospheric Research;NIWA"
	attribute PI_ADDRESS = "Private Bag 50061;Omakau, Central Otago, 9352;NEW ZEALAND"
	attribute PI_EMAIL = "d.smale@niwa.co.nz"
	attribute DO_NAME = "Smale;Daniel"
	attribute DO_AFFILIATION = "National Institute of Water and Atmospheric Research;NIWA"
	attribute DO_ADDRESS = "Private Bag 50061;Omakau, Central Otago, 9352;NEW ZEALAND"
	attribute DO_EMAIL = "d.smale@niwa.co.nz"
	attribute DS_NAME = "Smale;Daniel"
	attribute DS_AFFILIATION = "National Institute of Water and Atmospheric Research;NIWA"
	attribute DS_ADDRESS = "Private Bag 50061;Omakau, Central Otago, 9352;NEW ZEALAND"
	attribute DS_EMAIL = "d.smale@niwa.co.nz"
	attribute DATA_DESCRIPTION = "FTIR MIR H2CO vmr vertical profile data at LAUDER"
	attribute DATA_DISCIPLINE = "ATMOSPHERIC.PHYSICS;REMOTE.SENSING;GROUNDBASED"
	attribute DATA_GROUP = "EXPERIMENTAL;PROFILE.STATIONARY"
	attribute DATA_LOCATION = "LAUDER"
	attribute DATA_SOURCE = "FTIR.H2CO_NIWA006"
	attribute DATA_VARIABLES = "DATETIME;LATITUDE.INSTRUMENT;LONGITUDE.INSTRUMENT;ALTITUDE.INSTRUMENT;SURFACE.PRESSURE_INDEPENDENT;SURFACE.TEMPERATURE_INDEPENDENT;ALTITUDE;ALTITUDE.BOUNDARIES;PRESSURE_INDEPENDENT;TEMPERATURE_INDEPENDENT;H2CO.MIXING.RATIO.VOLUME_ABSORPTION.SOLAR;H2CO.MIXING.RATIO.VOLUME_ABSORPTION.SOLAR_APRIORI;H2CO.MIXING.RATIO.VOLUME_ABSORPTION.SOLAR_AVK;INTEGRATION.TIME;H2CO.MIXING.RATIO.VOLUME_ABSORPTION.SOLAR_UNCERTAINTY.RANDOM.COVARIANCE;H2CO.MIXING.RATIO.VOLUME_ABSORPTION.SOLAR_UNCERTAINTY.SYSTEMATIC.COVARIANCE;H2CO.COLUMN.PARTIAL_ABSORPTION.SOLAR;H2CO.COLUMN.PARTIAL_ABSORPTION.SOLAR_APRIORI;H2CO.COLUMN_ABSORPTION.SOLAR;H2CO.COLUMN_ABSORPTION.SOLAR_APRIORI;H2CO.COLUMN_ABSORPTION.SOLAR_AVK;H2CO.COLUMN_ABSORPTION.SOLAR_UNCERTAINTY.RANDOM.STANDARD;H2CO.COLUMN_ABSORPTION.SOLAR_UNCERTAINTY.SYSTEMATIC.STANDARD;ANGLE.SOLAR_ZENITH.ASTRONOMICAL;ANGLE.SOLAR_AZIMUTH;H2O.MIXING.RATIO.VOLUME_ABSORPTION.SOLAR;H2O.COLUMN_ABSORPTION.SOLAR"
	attribute DATA_START_DATE = "20260731T230149Z"
	attribute DATA_STOP_DATE = "20260828T045522Z"
	attribute DATA_FILE_VERSION = "001"
	attribute DATA_MODIFICATIONS = "Same as version 007, but renamed for RD submission"
	attribute DATA_CAVEATS = "None"
	attribute DATA_RULES_OF_USE = "Please contact d.smale@niwa.co.nz . These data have been provided with the understanding that anyone accessing the data will contact the PI of the Lauder FTIR program, Dan Smale (d.smale@niwa.co.nz), to discuss the intended uses of the data. Measurement work at NIWA is funded under a contract that requires identification of end-users of the data. Use of these proprietary data without consultation with the programme PI may jeopardise the renewal of this contract and hence the future of the FTIR measurement programme. In the case of use of proprietary data that is not yet released to the general public, co-authorship shall be offered on all resulting publications to those investigators participating in the process. Data license: Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0). In the acknowledgements section of any paper that uses data in this file the following comment be added: --The NIWA MIR-FTIR programme is core funded by NIWA through the New Zealand Ministry of Business, Innovation and Employment (MBIE)--.People who use NDACC data in a publication are requested to include the following acknowledgment: --The data used in this publication were obtained from NIWA (Dan Smale) as part of the Network for the Detection of Atmospheric Composition Change (NDACC) and are available through the NDACC web site.--"
	attribute DATA_ACKNOWLEDGEMENT = "We would like to the thank Lauder and University of Denver FTIR teams and acknowledge the technical and logistical support of Antarctica New Zealand.The NIWA FTIR programme is funded through the New Zealand government core research grant framework from the Ministry of Business, Innovation and Employment.We also thank NCEP for the use of their daily ZPT data."
	attribute DATA_QUALITY = "RD;Spectra and Retrieval output meet in-house quality control criteria. Measurements post year 2000 use HBr cell spectra measured monthly. Analysis of HBr spectra by LINEFIT (Hase, F., Blumenstock, T., Paton-Walsh, C. (1999). Analysis of the instrumental line shape of high-resolution Fourier transform IR spectrometers with gas cell measurements and new retrieval software. Applied optics 38(15), 3417.)"
	attribute DATA_TEMPLATE = "GEOMS-TE-FTIR-002"
	attribute DATA_PROCESSOR = "sfit4_v0944(OEM) https://wiki.ucar.edu/display/sfit4/SFIT+Core+Code"
	attribute FILE_NAME = "groundbased_ftir.h2co_niwa006_lauder_20260731t230149z_20260828t045522z_001.hdf"
	attribute FILE_GENERATION_DATE = "20260901T202153Z"
	attribute FILE_ACCESS = "NDACC"
	attribute FILE_PROJECT_ID = "CAMS27;"
	attribute FILE_DOI = " "
	attribute FILE_ASSOCIATION = "NDACC"
	attribute FILE_META_VERSION = "04R080;CUSTOM"