Le produit de version 1 de la suite radiométrique VIIRS (Visible Infrared Imaging Radiometer Suite) de la NASA pour le partenariat Suomi National Polar-Orbiting (Suomi NPP) fournit des informations sur la qualité de la BRDF et de l'albédo à une résolution de 500 m. Le produit VNP43IA2 est généré quotidiennement à l'aide de 16 jours de données VIIRS et est pondéré temporellement au neuvième jour, ce qui se reflète dans le nom du fichier.
Le produit VNP43IA2 fournit des informations sur la qualité des bandes et le nombre de jours d'observation valide au cours d'une période de 16 jours pour les bandes d'imagerie VIIRS.
Les produits de données VNP43 sont conçus pour assurer la continuité de la suite de produits de données BRDF/Albedo du spectroradiomètre imageur à résolution modérée (MODIS) de la NASA.
Les données de la NASA du LP DAAC sont accessibles sans frais. Toutefois, lorsqu'un auteur publie ces données ou des travaux basés sur ces données, il est demandé à l'auteur de citer les ensembles de données dans le texte de la publication et d'inclure une référence à ceux-ci dans la liste des références.
Citations
Citations :
Pour savoir comment citer les ensembles de données LP DAAC, consultez la page Citing Our Data (Citer nos données).
Le produit de version 1 de la fonction de distribution de réflectance bidirectionnelle (BRDF) et de la qualité d'albédo (VNP43IA2) de la suite radiométrique VIIRS (Visible Infrared Imaging Radiometer Suite) du partenariat Suomi National Polar-Orbiting (Suomi NPP) de la NASA fournit la qualité BRDF et d'albédo à une résolution de 500 m. Le produit VNP43IA2 est généré quotidiennement à l'aide de 16 jours de données VIIRS et est pondéré temporellement…
[null,null,[],[[["\u003cp\u003eThe NOAA/VIIRS/001/VNP43IA2 dataset provides daily Bidirectional Reflectance Distribution Function (BRDF) and Albedo quality information at 500m resolution, derived from Suomi NPP VIIRS imagery.\u003c/p\u003e\n"],["\u003cp\u003eThe product utilizes 16 days of VIIRS data, temporally weighted to the ninth day, offering insights into band quality and valid observation days.\u003c/p\u003e\n"],["\u003cp\u003eVNP43IA2 includes bands for BRDF inversion information, land/water type, solar zenith angle, platform details, uncertainty, valid observations, and a snow flag.\u003c/p\u003e\n"],["\u003cp\u003eUsers can access the dataset through Google Earth Engine and find comprehensive documentation, including a User's Guide and ATBD, via provided links.\u003c/p\u003e\n"],["\u003cp\u003eIt is crucial to cite the dataset appropriately when publishing research based on it, as detailed on the LP DAAC 'Citing Our Data' page.\u003c/p\u003e\n"]]],[],null,["# VNP43IA2: BRDF/Albedo Quality Daily L3 Global 500m SIN Grid\n\nDataset Availability\n: 2012-01-17T00:00:00Z--2024-06-09T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA LP DAAC at the USGS EROS Center](https://doi.org/10.5067/VIIRS/VNP43IA2.001)\n\nCadence\n: 1 Day\n\nTags\n:\n[land](/earth-engine/datasets/tags/land) [nasa](/earth-engine/datasets/tags/nasa) [noaa](/earth-engine/datasets/tags/noaa) [satellite-imagery](/earth-engine/datasets/tags/satellite-imagery) [surface](/earth-engine/datasets/tags/surface) [viirs](/earth-engine/datasets/tags/viirs) \n\n#### Description\n\nThe Suomi National Polar-Orbiting Partnership (Suomi NPP) NASA Visible\nInfrared Imaging Radiometer Suite (VIIRS) Bidirectional Reflectance\nDistribution Function (BRDF) and Albedo Quality (VNP43IA2) Version 1 product\nprovides BRDF and Albedo quality at 500m resolution. The VNP43IA2\nproduct is produced daily using 16 days of VIIRS data and is weighted\ntemporally to the ninth day, which is reflected in the file name.\nThe VNP43IA2 product provides information regarding band quality and days\nof valid observation within a 16-day period for the VIIRS imagery bands.\nThe VNP43 data products are designed to promote the continuity of\nNASA's Moderate Resolution Imaging Spectroradiometer (MODIS)\nBRDF/Albedo data product suite.\n\nDocumentation:\n\n- [User's Guide](https://www.umb.edu/spectralmass/viirs_user_guide/vnp43ia2_and_vnp43ma2_brdf_albedo_quality_product)\n\n- [Algorithm Theoretical Basis Document (ATBD)](https://lpdaac.usgs.gov/documents/194/VNP43_ATBD_V1.pdf)\n\n- [General Documentation](https://lpdaac.usgs.gov/products/vnp43ia2v001/)\n\n- [Land Product Quality Assessment website](https://landweb.modaps.eosdis.nasa.gov/browse?sensor=VIIRS&sat=SNPP)\n\n### Bands\n\n\n**Pixel Size**\n\n500 meters\n\n**Bands**\n\n| Name | Units | Pixel Size | Description |\n|-------------------------------|-------|------------|------------------------------------------------------------|\n| `BRDF_Albedo_Band_Quality_I1` | | meters | BRDF inversion information I1 |\n| `BRDF_Albedo_Band_Quality_I2` | | meters | BRDF inversion information I2 |\n| `BRDF_Albedo_Band_Quality_I3` | | meters | BRDF inversion information I3 |\n| `BRDF_Albedo_LandWaterType` | | meters | Land/Water type |\n| `BRDF_Albedo_LocalSolarNoon` | deg | meters | Solar zenith angle at local solar noon |\n| `BRDF_Albedo_Platform` | | meters | Platform name |\n| `BRDF_Albedo_Uncertainty` | | meters | Weight of Determination (WoD) of WSA |\n| `BRDF_Albedo_ValidObs_I1` | d | meters | Days of valid observation within 16-day period for band I1 |\n| `BRDF_Albedo_ValidObs_I2` | d | meters | Days of valid observation within 16-day period for band I2 |\n| `BRDF_Albedo_ValidObs_I3` | d | meters | Days of valid observation within 16-day period for band I3 |\n| `Snow_BRDF_Albedo` | | meters | Snow flag |\n\n**BRDF_Albedo_Band_Quality_I1 Class Table**\n\n| Value | Color | Description |\n|-------|-------|---------------------------------------------------------|\n| 0 | None | best quality, full inversion (WoDs, RMSE majority good) |\n| 1 | None | good quality, full inversion |\n| 2 | None | Magnitude inversion (numobs ≥ 7) |\n| 3 | None | Magnitude inversion (numobs ≥ 2 \\& 7) |\n\n**BRDF_Albedo_Band_Quality_I2 Class Table**\n\n| Value | Color | Description |\n|-------|-------|---------------------------------------------------------|\n| 0 | None | best quality, full inversion (WoDs, RMSE majority good) |\n| 1 | None | good quality, full inversion |\n| 2 | None | Magnitude inversion (numobs ≥ 7) |\n| 3 | None | Magnitude inversion (numobs ≥ 2 \\& 7) |\n\n**BRDF_Albedo_Band_Quality_I3 Class Table**\n\n| Value | Color | Description |\n|-------|-------|---------------------------------------------------------|\n| 0 | None | best quality, full inversion (WoDs, RMSE majority good) |\n| 1 | None | good quality, full inversion |\n| 2 | None | Magnitude inversion (numobs ≥ 7) |\n| 3 | None | Magnitude inversion (numobs ≥ 2 \\& 7) |\n\n**BRDF_Albedo_LandWaterType Class Table**\n\n| Value | Color | Description |\n|-------|-------|-------------------------------|\n| 0 | None | Shallow ocean |\n| 1 | None | Land (Nothing else but land) |\n| 2 | None | Ocean and lake shorelines |\n| 3 | None | Shallow inland water |\n| 4 | None | Ephemeral water |\n| 5 | None | Deep inland water |\n| 6 | None | Moderate or continental ocean |\n| 7 | None | Deep ocean |\n\n**Snow_BRDF_Albedo Class Table**\n\n| Value | Color | Description |\n|-------|-------|----------------------------|\n| 0 | None | snow-free albedo retrieved |\n| 1 | None | snow albedo retrieved |\n\n### Terms of Use\n\n**Terms of Use**\n\nLP DAAC NASA data are freely accessible; however, when an author\npublishes these data or works based on the data, it is requested that the\nauthor cite the datasets within the text of the publication and include a\nreference to them in the reference list.\n\n### Citations\n\nCitations:\n\n- Please visit [LP DAAC 'Citing Our Data' page](https://lpdaac.usgs.gov/citing_our_data)\n for information on citing LP DAAC datasets.\n\n### DOIs\n\n- \u003chttps://doi.org/10.5067/VIIRS/VNP43IA2.001\u003e\n\n### Explore with Earth Engine\n\n| **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine)\n\n### Code Editor (JavaScript)\n\n```javascript\nvar dataset = ee.ImageCollection('NOAA/VIIRS/001/VNP43IA2')\n .filter(ee.Filter.date('2021-06-01', '2021-06-03'));\n\nvar visualization = {\n bands: ['BRDF_Albedo_ValidObs_I1'],\n min: 35550,\n max: 45535,\n palette: [\n '000080', '0000d9', '4000ff', '8000ff', '0080ff', '00ffff',\n '00ff80', '80ff00', 'daff00', 'ffff00', 'fff500', 'ffda00',\n 'ffb000', 'ffa400', 'ff4f00', 'ff2500', 'ff0a00', 'ff00ff',\n ]\n};\n\nMap.setCenter(89, 58, 6);\n\nMap.addLayer(dataset, visualization, 'Days of valid observation for band I1');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/NOAA/NOAA_VIIRS_001_VNP43IA2) \n[VNP43IA2: BRDF/Albedo Quality Daily L3 Global 500m SIN Grid](/earth-engine/datasets/catalog/NOAA_VIIRS_001_VNP43IA2) \nThe Suomi National Polar-Orbiting Partnership (Suomi NPP) NASA Visible Infrared Imaging Radiometer Suite (VIIRS) Bidirectional Reflectance Distribution Function (BRDF) and Albedo Quality (VNP43IA2) Version 1 product provides BRDF and Albedo quality at 500m resolution. The VNP43IA2 product is produced daily using 16 days of VIIRS data and is weighted temporally ... \nNOAA/VIIRS/001/VNP43IA2, land,nasa,noaa,satellite-imagery,surface,viirs \n2012-01-17T00:00:00Z/2024-06-09T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.5067/VIIRS/VNP43IA2.001](https://doi.org/https://doi.org/10.5067/VIIRS/VNP43IA2.001)\n- [https://doi.org/10.5067/VIIRS/VNP43IA2.001](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/NOAA_VIIRS_001_VNP43IA2)"]]
