HDF5 file, superblock version 2
group /
	attribute contact_email = "contact form at http://iasi.aeris-data.fr/contact/"
	attribute creator_name = "L. Clarisse (ULB, data PI, lclariss@ulb.ac.be), LATMOS-ULB for data production"
	attribute data_policy = "see https://iasi.aeris-data.fr/data-use-policy/"
	attribute geospatial_lat_max = "+90.0"
	attribute geospatial_lat_min = "-90.0"
	attribute geospatial_latitude_units = "degrees_north"
	attribute geospatial_lon_max = "+180.0"
	attribute geospatial_lon_min = "-180.0"
	attribute geospatial_longitude_units = "degrees_east"
	attribute geospatial_vertical_max = "25"
	attribute geospatial_vertical_min = "5"
	attribute geospatial_vertical_units = "km"
	attribute history = "2019-12-02 17:59:14 - Product generated with retrieval code version 2.1"
	attribute id = "IASI_METOPA_L2_SO2_20120405_ULB-LATMOS_V2.1.0.nc"
	attribute institution = "ULB-LATMOS"
	attribute keywords = "satellite,observation,atmosphere,sulfur dioxide,SO2,level 2,column,altitude,profile,volcano,pollution,IASI,Metop-A"
	attribute keywords_vocabulary = "GCMD Science Keywords"
	attribute netcdf_conventions = "CF-1.6"
	attribute platform = "Metop-A"
	attribute product_version = "2.1.0"
	attribute references = "Reference to the SO2 retrieval: Clarisse et al., Retrieval of sulphur dioxide from the infrared atmospheric sounding interferometer (IASI), Atmos. Meas. Tech., 5, 581-594, doi:10.5194/amt-5-581-2012, 2012. Reference to the altitude retrieval: Clarisse et al., The 2011 Nabro eruption, a SO2 plume height analysis using IASI measurements, Atmos. Chem. Phys., 14, 3095-3111, doi:10.5194/acp-14-3095-2014, 2014."
	attribute sensor = "IASI"
	attribute source = "Eumetsat IASI Level-1C data (version 4 up to 20100518, version 5 from 20100518 to 20110929, version 6 from 20110929 to 20130808, version 7 from 20130808), Eumetsat IASI Level-2 (version 4 up to 20100914, version 5 from 20100914 to 20140930, version 6 from 20140930, version 6.1 from 20150924, version 6.3 from 20170620)"
	attribute spatial_resolution = "12km at nadir"
	attribute standard_name_vocabulary = "NetCDF Climate and Forecast (CF) Medata Convention version 30, 3 December 2015"
	attribute summary = "This dataset contains Level-2 sulfur dioxide columns and plume altitudes products from IASI observations."
	attribute time_coverage_end = "20120405T235959Z"
	attribute time_coverage_start = "20120405T000000Z"
	attribute title = "IASI/Metop-A ULB-LATMOS sulfur dioxide (SO2) L2 products (columns and altitudes)"
dataset /AMPM: int16, shape (1283399)
	attribute comment = "AM/PM = 0 for AM data, AM/PM = 1 for PM data"
	attribute long_name = "AM/PM flag based on local time"
dataset /SO2_all_altitudes: float32, shape (1283399, 7)
	attribute long_name = "Retrieved SO2 assuming all the SO2 is confined to a small layer centred at 5, 7, 11, 13, 16, 19 or 25 km"
	attribute missing_value = -999.0
	attribute multiplication_factor_to_convert_to_DU = 2238.7144200743496
	attribute multiplication_factor_to_convert_to_molecules_percm2 = 6.02214179e+19
	attribute units = "mol m-2"
dataset /SO2_interpolated: float32, shape (1283399)
	attribute long_name = "SO2 interpolated at the retrieved altitude given in SO2_vertical_level variable"
	attribute missing_value = -999.0
	attribute multiplication_factor_to_convert_to_DU = 2238.7144200743496
	attribute multiplication_factor_to_convert_to_molecules_percm2 = 6.02214179e+19
	attribute units = "mol m-2"
dataset /SO2_vertical_level: float32, shape (1283399)
	attribute long_name = "Retrieved vertical level of the SO2 plume"
	attribute missing_value = -999.0
	attribute units = "km"
dataset /fov_number: int16, shape (1283399)
	attribute long_name = "field of view number in the 2 x 2 observation matrix"
	attribute valid_range = 1.0, 4.0
dataset /latitude: float32, shape (1283399)
	attribute long_name = "latitude of ground pixel center"
	attribute standard_name = "latitude"
	attribute units = "degrees_north"
	attribute valid_range = -90.0, 90.0
dataset /longitude: float32, shape (1283399)
	attribute long_name = "longitude of ground pixel center"
	attribute standard_name = "longitude"
	attribute units = "degrees_east"
	attribute valid_range = -180.0, 180.0
dataset /nchartime: float32, shape (16)
dataset /nlevels: float32, shape (7)
dataset /orbit_number: int32, shape (1283399)
	attribute long_name = "Metop orbit number"
dataset /pixel_number: int16, shape (1283399)
	attribute long_name = "pixel number in the current scanline"
	attribute valid_range = 1.0, 120.0
dataset /satellite_zen_angle: float32, shape (1283399)
	attribute long_name = "Metop zenith angle at the Earth's surface for the pixel center"
	attribute standard_name = "platform_zenith_angle"
	attribute units = "degrees"
dataset /scanline_number: int16, shape (1283399)
	attribute long_name = "scanline number in the Metop orbit"
dataset /sun_zen_angle: float32, shape (1283399)
	attribute long_name = "solar zenith angle at the Earth's surface for the pixel center"
	attribute standard_name = "solar_zenith_angle"
	attribute units = "degrees"
dataset /time: float64, shape (1283399)
	attribute long_name = "observation time in seconds since 2007-01-01 00:00:00 UTC"
	attribute standard_name = "time"
	attribute units = "second"
dataset /time_in_day: float64, shape (1283399)
	attribute long_name = "observation time in seconds in the day"
	attribute units = "second"
dataset /time_string: string(1), shape (1283399, 16)
	attribute long_name = "UTC observation time as YYYYMMDDThhmmssZ"