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Merge pull request #4850 from nasa-gibs/release
Release to Main v4.21.0
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The VIIRS Dark Target Aerosol Optical Thickness layer is useful for studying aerosol optical depth over the ocean as well as vegetation/dark-soiled land, which are both dark in the visible wavelengths.
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This layer is created from two separate and distinct DT algorithms. One helps retrieve aerosol information over ocean (dark in visible and longer wavelengths), while the second aids retrievals over vegetated/dark-soiled land (dark in the visible).
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The VIIRS Dark Target Aerosol Optical Thickness layer is available from the joint NASA/NOAA NOAA-20 satellite (AERDT_L2_VIIRS_NOAA20) for the daytime overpass. The sensor/algorithm resolution is 6 km at nadir, imagery resolution is 2 km at nadir, and the temporal resolution is daily. Resolution is much coarser out toward the edge of the swath.
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References: AERDT_L2_VIIRS_NOAA20 [doi:10.5067/VIIRS/AERDT_L2_VIIRS_NOAA20.002](https://doi.org/10.5067/VIIRS/AERDT_L2_VIIRS_NOAA20.002)
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The VIIRS Deep Blue Aerosol Optical Thickness layer is useful for studying aerosol optical depth over the ocean as well as retrieving over desert/arid land (bright in the visible wavelengths).
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This layer is the combined Aerosol Optical Depth at 550 nm, only populated for those retrieval pixels passing quality assurance tests. It is created from the Deep Blue (DB) algorithm over land and the Satellite Ocean Aerosol Retrieval (SOAR) algorithm over water to determine atmospheric aerosol loading for day time cloud-free snow-free scenes. This data product is designed to facilitate continuity in the aerosol record provided by the Deep Blue aerosol project for other sensors including the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) and Terra/Aqua Moderate Resolution Imaging Spectroradiometers (MODIS).
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The VIIRS Deep Blue Aerosol Optical Thickness layer is available from the joint NASA/NOAA NOAA-20 satellite (AERDB_L2_VIIRS_NOAA20) for the daytime overpass. The sensor/algorithm resolution is 6 km at nadir, imagery resolution is 2 km at nadir, and the temporal resolution is daily. Resolution is much coarser out toward the edge of the swath.
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References: AERDB_L2_VIIRS_NOAA20_NRT [doi:10.5067/VIIRS/AERDB_L2_VIIRS_NOAA20_NRT.002](https://doi.org/10.5067/VIIRS/AERDB_L2_VIIRS_NOAA20_NRT.002); AERDB_L2_VIIRS_NOAA20 [doi:10.5067/VIIRS/AERDB_L2_VIIRS_NOAA20.002](https://doi.org/10.5067/VIIRS/AERDB_L2_VIIRS_NOAA20.002)
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The VIIRS Deep Blue Aerosol Type layer provides information related to the aerosol composition over land and ocean.
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The Deep Blue (DB) algorithm is employed for over-land use and the Satellite Ocean Aerosol Retrieval (SOAR) algorithm is used over water to determine atmospheric aerosol type for day time cloud-free snow-free scenes. The combined Aerosol Type over land and ocean layer is derived from pixels that pass high-quality assurance tests. Over water, aerosol type is retrieved via the aerosol type optical model that yields the best fit. Over land, aerosol type is classified based on Aerosol Optical Depth (AOD), Ångström exponent, Lambert Equivalent Reflectivity (LER), and brightness temperature.
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The VIIRS Deep Blue Aerosol Type layer is available from the joint NASA/NOAA NOAA-20 satellite (AERDB_L2_VIIRS_NOAA20) for the daytime overpass. The sensor/algorithm resolution is 6 km at nadir, imagery resolution is 2 km at nadir, and the temporal resolution is daily. Resolution is much coarser out toward the edge of the swath.
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References: AERDB_L2_VIIRS_NOAA20_NRT [doi:10.5067/VIIRS/AERDB_L2_VIIRS_NOAA20_NRT.002](https://doi.org/10.5067/VIIRS/AERDB_L2_VIIRS_NOAA20_NRT.002); AERDB_L2_VIIRS_NOAA20 [doi:10.5067/VIIRS/AERDB_L2_VIIRS_NOAA20.002](https://doi.org/10.5067/VIIRS/AERDB_L2_VIIRS_NOAA20.002)
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The VIIRS Dark Target Aerosol Angstrom Exponent layer can be used to provide additional information related to the aerosol particle size over the ocean (larger the exponent, the smaller the particle size). Values < 1 suggest optical dominance of coarse particles (e.g. dust) and values > 1 suggest optical dominance of fine particles (e.g. smoke).
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This layer is created from two separate and distinct DT algorithms. One helps retrieve aerosol information over ocean (dark in visible and longer wavelengths), while the second aids retrievals over vegetated/dark-soiled land (dark in the visible).
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The VIIRS Dark Target Aerosol Ångström Exponent layer is available from the joint NASA/NOAA NOAA-20 satellite (AERDT_L2_VIIRS_NOAA20) for the daytime overpass. The sensor/algorithm resolution is 6 km at nadir, imagery resolution is 2 km at nadir, and the temporal resolution is daily. Resolution is much coarser out toward the edge of the swath.
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References: AERDT_L2_VIIRS_NOAA20 [doi:10.5067/VIIRS/AERDT_L2_VIIRS_NOAA20.002](https://doi.org/10.5067/VIIRS/AERDT_L2_VIIRS_NOAA20.002)
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The VIIRS Deep Blue Aerosol Angstrom Exponent layer can be used to provide additional information related to the aerosol particle size over land and ocean (larger the exponent, the smaller the particle size). Values < 1 suggest optical dominance of coarse particles (e.g. dust) and values > 1 suggest optical dominance of fine particles (e.g. smoke).
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Ångström exponent over land is defined between 412-470 nm for 'bright' surfaces, and 470-670 nm for 'dark' surfaces. The combined Ångström exponent over land and ocean are for those retrieval pixels passing quality assurance tests. This layer is created from the Deep Blue (DB) algorithm over land and the Satellite Ocean Aerosol Retrieval (SOAR) algorithm over water to determine atmospheric aerosol loading for day time cloud-free snow-free scenes. This data product is designed to facilitate continuity in the aerosol record provided by the Deep Blue aerosol project for other sensors including the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) and Terra/Aqua Moderate Resolution Imaging Spectroradiometers (MODIS).
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The VIIRS Deep Blue Aerosol Ångström Exponent layer is available from the joint NASA/NOAA NOAA-20 satellite (AERDB_L2_VIIRS_NOAA20) for the daytime overpass. The sensor/algorithm resolution is 6 km at nadir, imagery resolution is 2 km at nadir, and the temporal resolution is daily. Resolution is much coarser out toward the edge of the swath.
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References: AERDB_L2_VIIRS_NOAA20_NRT [doi:10.5067/VIIRS/AERDB_L2_VIIRS_NOAA20_NRT.002](https://doi.org/10.5067/VIIRS/AERDB_L2_VIIRS_NOAA20_NRT.002); AERDB_L2_VIIRS_NOAA20 [doi:10.5067/VIIRS/AERDB_L2_VIIRS_NOAA20.002](https://doi.org/10.5067/VIIRS/AERDB_L2_VIIRS_NOAA20.002)

config/default/common/config/metadata/layers/viirs/snpp/VIIRS_SNPP_AOT_Dark_Target_Land_Ocean.md

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This layer is created from two separate and distinct DT algorithms. One helps retrieve aerosol information over ocean (dark in visible and longer wavelengths), while the second aids retrievals over vegetated/dark-soiled land (dark in the visible).
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The VIIRS Dark Target Aerosol Ångström Exponent layer is available from the joint NASA/NOAA Suomi National Polar orbiting Partnership (Suomi NPP) satellite (AERDT_L2_VIIRS_SNPP) for the daytime overpass. The sensor/algorithm resolution is 6 km at nadir, imagery resolution is 2 km at nadir, and the temporal resolution is daily. Resolution is much coarser out toward the edge of the swath.
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The VIIRS Dark Target Aerosol Optical Thickness layer is available from the joint NASA/NOAA Suomi National Polar orbiting Partnership (Suomi NPP) satellite (AERDT_L2_VIIRS_SNPP) for the daytime overpass. The sensor/algorithm resolution is 6 km at nadir, imagery resolution is 2 km at nadir, and the temporal resolution is daily. Resolution is much coarser out toward the edge of the swath.
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References: AERDT_L2_VIIRS_SNPP [doi:10.5067/VIIRS/AERDT_L2_VIIRS_SNPP.001](https://doi.org/10.5067/VIIRS/AERDT_L2_VIIRS_SNPP.001)
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References: AERDT_L2_VIIRS_SNPP [doi:10.5067/VIIRS/AERDT_L2_VIIRS_SNPP.002](https://doi.org/10.5067/VIIRS/AERDT_L2_VIIRS_SNPP.002)

config/default/common/config/metadata/layers/viirs/snpp/VIIRS_SNPP_Angstrom_Exponent_Dark_Target_Ocean.md

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The VIIRS Dark Target Aerosol Ångström Exponent layer is available from the joint NASA/NOAA Suomi National Polar orbiting Partnership (Suomi NPP) satellite (AERDT_L2_VIIRS_SNPP) for the daytime overpass. The sensor/algorithm resolution is 6 km at nadir, imagery resolution is 2 km at nadir, and the temporal resolution is daily. Resolution is much coarser out toward the edge of the swath.
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References: AERDT_L2_VIIRS_SNPP [doi:10.5067/VIIRS/AERDT_L2_VIIRS_SNPP.001](https://doi.org/10.5067/VIIRS/AERDT_L2_VIIRS_SNPP.001)
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References: AERDT_L2_VIIRS_SNPP [doi:10.5067/VIIRS/AERDT_L2_VIIRS_SNPP.002](https://doi.org/10.5067/VIIRS/AERDT_L2_VIIRS_SNPP.002)

config/default/common/config/wv.json/layerOrder.json

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"VIIRS_SNPP_AOT_Deep_Blue_Best_Estimate",
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"VIIRS_SNPP_Angstrom_Exponent_Dark_Target_Ocean",
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"VIIRS_SNPP_AOT_Dark_Target_Land_Ocean",
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"VIIRS_NOAA20_Aerosol_Type_Deep_Blue_Best_Estimate",
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"VIIRS_NOAA20_Angstrom_Exponent_Deep_Blue_Best_Estimate",
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"VIIRS_NOAA20_AOT_Deep_Blue_Best_Estimate",
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"VIIRS_NOAA20_Angstrom_Exponent_Dark_Target_Ocean",
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"VIIRS_NOAA20_AOT_Dark_Target_Land_Ocean",
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"VIIRS_SNPP_Clear_Sky_Confidence_Day",
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"VIIRS_SNPP_Clear_Sky_Confidence_Night",
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"VIIRS_SNPP_Cloud_Optical_Thickness",
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"VIIRS_NOAA20_Sea_Ice",
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"VIIRS_NOAA20_Ice_Surface_Temp_Day",
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"VIIRS_NOAA20_Ice_Surface_Temp_Night",
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"Landsat_WELD_CorrectedReflectance_TrueColor_Global_Monthly",
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"Landsat_WELD_CorrectedReflectance_TrueColor_Global_Annual",
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"Landsat_WELD_CorrectedReflectance_Bands157_Global_Annual",

config/default/common/config/wv.json/layers/multi-mission/opera/OPERA_L3_Dynamic_Surface_Water_Extent-HLS_Provisional.json

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"description": "multi-mission/opera/OPERA_L3_Dynamic_Surface_Water_Extent-HLS_Provisional",
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"tags": "podaac PO.DAAC DSWx flood",
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"group": "overlays",
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"layergroup": "Surface Water Extent",
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"disableSnapshot": true
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"layergroup": "Surface Water Extent"
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}
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}
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}
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{
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"layers": {
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"VIIRS_NOAA20_AOT_Dark_Target_Land_Ocean": {
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"id": "VIIRS_NOAA20_AOT_Dark_Target_Land_Ocean",
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"description": "viirs/noaa20/VIIRS_NOAA20_AOT_Dark_Target_Land_Ocean",
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"tags": "",
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"group": "overlays",
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"layergroup": "Aerosol Optical Depth",
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"wrapadjacentdays": true
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}
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}
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}

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