Attributes { HDF5_GLOBAL { String history "File written on January 26, 2024"; String institution "George Washington University, Department of Environmental and Occupational Health"; String source "Level 2 NO2 Version 2.4 algorithm from them Tropospheric Monitoring Instrument on the Copernicus Sentinel 5-Precursor satellite mission"; String Conventions "CF-1.10"; String LongName "HAQAST Sentinel-5P TROPOMI Nitrogen Dioxide (NO2) CONUS Seasonal Level 3 0.01 x 0.01 Degree Gridded Data"; String ShortName "HAQ_TROPOMI_NO2_CONUS_S_L3"; String title "Sentinel-5P TROPOMI Nitrogen Dioxide (NO2) Level 3 CONUS Seasonal 0.01 x 0.01 Degree Data"; String VersionID "2.4"; String Format "netCDF"; String DataSetQuality "TROPOMI pixel data filtered using a qa_value > 0.75; pixel data with qa_values <0.75 are excluded in the monthly average"; String IdentifierProductDOI "10.5067/QVH8JOFDSU2J"; String IdentifierProductDOIAuthority "https://doi.org/"; String ProcessingLevel "Level 3"; String GranuleID "HAQ_TROPOMI_NO2_CONUS_QA75_L3_Seasonal_SON_2023_V2.4_20240126.nc4"; String ProductionDateTime "2024-01-26T00:00:00Z"; String SouthernmostLatitude "24.50"; String NorthernmostLatitude "49.49"; String WesternmostLongitude "-124.75"; String EasternmostLongitude "-66.76"; String RangeBeginningDate "2023-09-01"; String RangeBeginningTime "00:00:00.000000Z"; String RangeEndingDate "2023-11-30"; String RangeEndingTime "23:59:59.999999Z"; String comment "File produced by Dan Goldberg, George Washington University, Email: dgoldberg@gwu.edu"; String references "Goldberg, D. L., Anenberg, S. C., Kerr, G. H., Mohegh, A., Lu, Z., & Streets, D. G. (2021). TROPOMI NO2 in the United States: A Detailed Look at the Annual Averages, Weekly Cycles, Effects of Temperature, and Correlation With Surface NO 2 Concentrations. Earth’s Future, 9(4), e2020EF001665. https://doi.org/10.1029/2020EF001665"; } Tropospheric_NO2 { String long_name "Tropospheric vertical column NO2 density"; String units "molec cm-2"; String standard_name "troposphere_mole_content_of_nitrogen_dioxide"; Float32 _FillValue -999.0000000; String origname "Tropospheric_NO2"; String fullnamepath "/Tropospheric_NO2"; } Number_obs { String long_name "number of valid pixels used for the average"; String units "count"; String standard_name "number_of_observations"; Float32 _FillValue -999.0000000; String origname "Number_obs"; String fullnamepath "/Number_obs"; } Latitude { String long_name "latitude, center of the grid cell"; String units "degrees_north"; String standard_name "latitude"; String origname "Latitude"; String fullnamepath "/Latitude"; } Longitude { String long_name "longitude, center of the grid cell"; String units "degrees_east"; String standard_name "longitude"; String origname "Longitude"; String fullnamepath "/Longitude"; } }