MOD10A2 é um conjunto de dados de cobertura de neve do MODIS no satélite Terra.
O conjunto de dados informa a extensão máxima da cobertura de neve durante um período de oito dias com resolução de 500 m.
Um período de composição de oito dias foi escolhido porque esse é o período exato de repetição da trajetória no solo das plataformas Terra e Aqua. A cobertura de neve em oito dias é mapeada como extensão máxima de neve em um SDS e como uma cronologia de observações no outro SDS. Os períodos de oito dias começam no primeiro dia do ano e se estendem até o ano seguinte. O produto pode ser produzido com
dois a oito dias de entrada. Nem sempre há oito dias de entrada, por vários motivos. Por isso, o usuário precisa verificar os atributos para determinar em quais dias as observações foram feitas.
Extensão máxima de neve observada em um período de oito dias.
Eight_Day_Snow_Cover
metros
Flags de bits de cronologia de neve para cada dia no período de observação de oito dias.
Bitmask para Eight_Day_Snow_Cover
Bit 0: dia 1
Bit 1: dia 2
Bit 2: dia 3
Bit 3: dia 4
Bit 4: dia 5
Bit 5: dia 6
Bit 6: dia 7
Bit 7: dia 8
Tabela de classes de extensão máxima de neve
Valor
Cor
Descrição
0
Nenhum
Dados ausentes
1
Nenhum
Sem decisão
11
Nenhum
Noite
25
Nenhum
Sem neve
37
Nenhum
Lago
39
Nenhum
Oceano
50
Nenhum
Cloud
100
Nenhum
Gelo no lago
200
Nenhum
Neve
254
Nenhum
Detector saturado
Termos de Uso
Termos de Uso
Você pode fazer o download e usar fotografias, imagens ou texto do site do NSIDC, a menos que as limitações de uso sejam especificamente declaradas. Para mais informações sobre o uso e a citação de conjuntos de dados do NSIDC, acesse a página "Uso e direitos autorais" do NSIDC (em inglês).
Citações
Citações:
Hall, D. K., V. V. Salomonson e G. A. Riggs. 2016. MODIS/Terra
Snow Cover Daily L3 Global 500m Grid. Versão 6. Boulder, Colorado, EUA: National Snow and Ice Data Center / Distributed Active Archive Center da NASA.
MOD10A2 é um conjunto de dados de cobertura de neve do MODIS no satélite Terra. O conjunto de dados informa a extensão máxima da cobertura de neve durante um período de oito dias com resolução de 500 m. Um período de composição de oito dias foi escolhido porque esse é o período exato de repetição da trajetória no solo do Terra e do …
[null,null,[],[[["\u003cp\u003eThe MOD10A2 dataset provides information on snow cover, collected by the MODIS sensor on the Terra satellite, spanning from February 18, 2000, to January 25, 2025.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset reports the maximum snow cover extent over eight-day periods at a 500-meter resolution, with data provided by NASA NSIDC DAAC at CIRES.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset includes the maximum snow extent observed over eight days, and a snow chronology bitmask, both of which use specific value ranges to represent no snow, cloud cover, or snow.\u003c/p\u003e\n"],["\u003cp\u003eThe data is collected daily, and the eight day collection period is chosen to match the exact ground track of the Terra and Aqua platforms.\u003c/p\u003e\n"],["\u003cp\u003eUsers can access and analyze the dataset using Google Earth Engine, which is free for research, education, and nonprofit purposes, and can be registered to gain access.\u003c/p\u003e\n"]]],[],null,["# MOD10A2.061 Terra Snow Cover 8-Day L3 Global 500m\n\nDataset Availability\n: 2000-02-18T00:00:00Z--2025-08-05T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA NSIDC DAAC at CIRES](https://doi.org/10.5067/MODIS/MOD10A2.061)\n\nCadence\n: 1 Day\n\nTags\n:\n[cryosphere](/earth-engine/datasets/tags/cryosphere) [daily](/earth-engine/datasets/tags/daily) [geophysical](/earth-engine/datasets/tags/geophysical) [global](/earth-engine/datasets/tags/global) [modis](/earth-engine/datasets/tags/modis) [nasa](/earth-engine/datasets/tags/nasa) [nsidc](/earth-engine/datasets/tags/nsidc) [snow](/earth-engine/datasets/tags/snow) [terra](/earth-engine/datasets/tags/terra) \n\n#### Description\n\nMOD10A2 is a snow cover dataset from the MODIS on the Terra satellite.\nThe dataset reports the maximum snow cover extent during an eight-day\nperiod at the resolution of 500 m.\n\nAn eight-day compositing period was chosen because that is the exact ground\ntrack repeat period of the Terra and Aqua platforms. Snow cover over eight\ndays is mapped as maximum snow extent in one SDS and as a chronology of\nobservations in the other SDS. Eight-day periods begin on the first day of\nthe year and extend into the next year. The product can be produced with\ntwo to eight days of input. There may not always be eight days of input,\nbecause of various reasons, so the user should check the attributes to\ndetermine on what days observations were obtained.\n\n- [General documentation](https://doi.org/10.5067/MODIS/MOD10A2.061)\n- [User's Guide](https://modis-snow-ice.gsfc.nasa.gov/uploads/snow_user_guide_C6.1_final_revised_april.pdf),\n\n### Bands\n\n\n**Pixel Size**\n\n500 meters\n\n**Bands**\n\n| Name | Min | Max | Pixel Size | Description |\n|------------------------|-----|-----|------------|-----------------------------------------------------------------------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `Maximum_Snow_Extent` | 0 | 255 | meters | Maximum snow extent observed over an eight-day period. |\n| `Eight_Day_Snow_Cover` | | | meters | Snow chronology bit flags for each day in the eight-day observation period. |\n| Bitmask for Eight_Day_Snow_Cover - Bit 0: day 1 - Bit 1: day 2 - Bit 2: day 3 - Bit 3: day 4 - Bit 4: day 5 - Bit 5: day 6 - Bit 6: day 7 - Bit 7: day 8 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n\n**Maximum_Snow_Extent Class Table**\n\n| Value | Color | Description |\n|-------|-------|--------------------|\n| 0 | None | Missing data |\n| 1 | None | No decision |\n| 11 | None | Night |\n| 25 | None | No snow |\n| 37 | None | Lake |\n| 39 | None | Ocean |\n| 50 | None | Cloud |\n| 100 | None | Lake ice |\n| 200 | None | Snow |\n| 254 | None | Detector saturated |\n\n### Terms of Use\n\n**Terms of Use**\n\nYou may download and use photographs, imagery, or text\nfrom the NSIDC web site, unless limitations for its use are specifically\nstated. For more information on usage and citing NSIDC datasets,\nplease visit the\n[NSIDC 'Use and Copyright' page](https://nsidc.org/about/data-use-and-copyright).\n\n### Citations\n\nCitations:\n\n- Hall, D. K., V. V. Salomonson, and G. A. Riggs. 2016. MODIS/Terra\n Snow Cover Daily L3 Global 500m Grid. Version 6. Boulder, Colorado\n USA: NASA National Snow and Ice Data Center Distributed Active\n Archive Center.\n\n### DOIs\n\n- \u003chttps://doi.org/10.5067/MODIS/MOD10A1.061\u003e\n- \u003chttps://doi.org/10.5067/MODIS/MOD10A2.061\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('MODIS/061/MOD10A2')\n .filter(ee.Filter.date('2023-01-01', '2023-12-01'))\n .select('Maximum_Snow_Extent');\n\nvar visualization = {\n min: 50.0,\n max: 200.0,\n palette: [\n '000000',\n '0dffff',\n '0524ff',\n 'ffffff'\n ]\n};\n\n\nMap.setCenter(-3.69, 65.99, 4);\n\nMap.addLayer(dataset.mean(), visualization, 'Maximum_Snow_Extent');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/MODIS/MODIS_061_MOD10A2) \n[MOD10A2.061 Terra Snow Cover 8-Day L3 Global 500m](/earth-engine/datasets/catalog/MODIS_061_MOD10A2) \nMOD10A2 is a snow cover dataset from the MODIS on the Terra satellite. The dataset reports the maximum snow cover extent during an eight-day period at the resolution of 500 m. An eight-day compositing period was chosen because that is the exact ground track repeat period of the Terra and ... \nMODIS/061/MOD10A2, cryosphere,daily,geophysical,global,modis,nasa,nsidc,snow,terra \n2000-02-18T00:00:00Z/2025-08-05T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.5067/MODIS/MOD10A2.061](https://doi.org/https://doi.org/10.5067/MODIS/MOD10A2.061)\n- [https://doi.org/10.5067/MODIS/MOD10A2.061](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/MODIS_061_MOD10A2)"]]
