La misión satelital internacional de Medición Global de Precipitación (GPM) proporciona observaciones de próxima generación de lluvia y nieve en todo el mundo cada tres horas. El algoritmo Integrated Multi-satellitE Retrievals for GPM (IMERG) es el algoritmo unificado que proporciona estimaciones de lluvia combinando datos de todos los instrumentos de microondas pasivos de la Constelación GPM.
El objetivo de este algoritmo es intercalibrar, combinar e interpolar todas las estimaciones de precipitación por microondas satelitales, junto con las estimaciones satelitales infrarrojas (IR) calibradas por microondas, los análisis de pluviómetros y, potencialmente, otros estimadores de precipitación en escalas temporales y espaciales finas para las eras de TRMM y GPM en todo el mundo.
El sistema se ejecuta varias veces para cada hora de observación, primero proporciona una estimación rápida y, luego, ofrece mejores estimaciones a medida que llegan más datos. En el último paso, se usan los datos de los medidores mensuales para crear productos a nivel de investigación. Consulta la Documentación técnica de IMERG para obtener más detalles sobre el algoritmo.
Esta colección contiene productos provisionales que se reemplazan periódicamente por versiones actualizadas cuando los datos están disponibles. Los productos se marcan con una propiedad de metadatos llamada "status". Cuando un producto está disponible inicialmente, el valor de la propiedad es "provisional". Una vez que se actualiza un producto provisional con la versión final, este valor se actualiza a "permanente".
Esta colección contiene datos de las siguientes fuentes:
Bits 0 a 3: Identificador del sensor de fuente de PMW
0: Sin observación
1: TMI
2: (sin usar)
3: AMSR
4: SSMI
5: SSMIS
6: AMSU
7: MHS
8: SAPHIR
9: GMI
10: (sin usar)
11: CAJEROS AUTOMÁTICOS
12: AIRS
13: TOVS
14: CRIS
MWprecipitation
mm/h
0*
120*
metros
Precipitación combinada de PMW
IRinfluence
%
0*
100*
metros
Peso del filtro Kalman para IR
IRprecipitation
mm/h
0*
79.5*
metros
Precipitaciones de IR
precipitation
mm/h
0*
174*
metros
Precipitación de instantánea: calibrada
precipitationUncal
mm/h
0*
120*
metros
Precipitaciones en instantáneas (sin calibrar)
probabilityLiquidPrecipitation
%
0*
100*
metros
Probabilidad de fase de precipitación líquida
randomError
mm/h
0.24*
250*
metros
error aleatorio de precipitación calibrada
* Valor mínimo o máximo estimado
Condiciones de Uso
Condiciones de Uso
Todos los datos producidos por la NASA a partir de la misión del GPM están disponibles de forma gratuita para el público.
Citas
Citas:
Huffman, G.J., E.F. Stocker, D.T. Bolvin, E.J. Nelkin, Jackson Tan (2019),
GPM IMERG Final Precipitation L3 Half Hourly 0.1 degree x 0.1 degree V06,
Greenbelt, MD, Goddard Earth Sciences Data and Information Services Center
(GES DISC), Accessed: [Fecha de acceso a los datos],
doi:10.5067/GPM/IMERG/3B-HH/07
La Medición Global de Precipitación (GPM) es una misión satelital internacional que proporciona observaciones de próxima generación de lluvia y nieve en todo el mundo cada tres horas. Los Recuperaciones Integradas de Multi-satélite para GPM (IMERG) son el algoritmo unificado que proporciona estimaciones de lluvia combinando datos de todos los instrumentos de microondas pasivos en la Constelación de GPM. El objetivo de este algoritmo es…
[null,null,[],[[["\u003cp\u003eThe NASA/GPM_L3/IMERG_V07 dataset provides global precipitation estimates every 30 minutes, combining data from various satellite and ground-based sources.\u003c/p\u003e\n"],["\u003cp\u003eIMERG is a unified algorithm that merges and interpolates data from the GPM Constellation's passive-microwave instruments, IR satellite estimates, and gauge analyses.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset covers the period from June 1, 2000, to December 12, 2024, with a spatial resolution of approximately 11 km.\u003c/p\u003e\n"],["\u003cp\u003eData products are initially provisional and are regularly updated to permanent status as more refined information becomes available.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is freely available for public use and is accessible through Google Earth Engine.\u003c/p\u003e\n"]]],[],null,["Dataset Availability\n: 2000-06-01T00:00:00Z--2025-08-31T02:30:00Z\n\nDataset Provider\n:\n\n\n [NASA GES DISC at NASA Goddard Space Flight Center](https://doi.org/10.5067/GPM/IMERG/3B-HH/07)\n\nCadence\n: 30 Minutes\n\nTags\n:\n [climate](/earth-engine/datasets/tags/climate) [geophysical](/earth-engine/datasets/tags/geophysical) [gpm](/earth-engine/datasets/tags/gpm) [imerg](/earth-engine/datasets/tags/imerg) [jaxa](/earth-engine/datasets/tags/jaxa) [nasa](/earth-engine/datasets/tags/nasa) [precipitation](/earth-engine/datasets/tags/precipitation) [weather](/earth-engine/datasets/tags/weather) \nhalf-hourly \n\nDescription \nGlobal Precipitation Measurement (GPM) is an international\nsatellite mission to provide next-generation observations of\nrain and snow worldwide every three hours. The Integrated Multi-satellitE\nRetrievals for GPM (IMERG) is the unified algorithm that provides\nrainfall estimates combining data from all passive-microwave\ninstruments in the GPM Constellation.\n\nThis algorithm is intended to intercalibrate, merge, and interpolate\nall satellite microwave precipitation estimates, together with\nmicrowave-calibrated infrared (IR) satellite estimates, precipitation\ngauge analyses, and potentially other precipitation estimators at fine\ntime and space scales for the TRMM and GPM eras over the entire globe.\nThe system is run several times for each observation time, first\ngiving a quick estimate and successively providing better estimates\nas more data arrive. The final step uses monthly gauge data to\ncreate research-level products. See [IMERG Technical Documentation](https://pmm.nasa.gov/sites/default/files/document_files/IMERG_doc.pdf)\nfor more details on the algorithm.\n\nDocumentation:\n\n- [Algorithm Theoretical Basis Document](https://arthurhou.pps.eosdis.nasa.gov/Documents/IMERG_V07_ATBD_final.pdf)\n\n- [IMERG Quality Index](https://docserver.gesdisc.eosdis.nasa.gov/public/project/GPM/IMERGV06_QI.pdf)\n\n- [Caveats for IMERG extension into TRMM era](https://docserver.gesdisc.eosdis.nasa.gov/public/project/GPM/IMERGV06_TRMMera-caveats.pdf)\n\n- [IMERG Technical Documentation](https://arthurhou.pps.eosdis.nasa.gov/Documents/IMERG_TechnicalDocumentation_final.pdf)\n\n- [Release notes; New Morphing algorithm](https://gpm.nasa.gov/resources/documents/imerg-v07-release-notes)\n\n- [Remote-Sensing Reflectance](https://gpm1.gesdisc.eosdis.nasa.gov/data/GPM_L3/doc/README.GPM.pdf)\n\n- [Anomalies](https://gpmweb2https.pps.eosdis.nasa.gov/tsdis/AB/docs/gpm_anomalous.html)\n\nThis collection contains provisional\nproducts that are regularly replaced with updated versions when\nthe data become available. The products are marked with a metadata\nproperty called 'status'. When a product is initially made available,\nthe property value is 'provisional'. Once a provisional product\nhas been updated with the final version, this value is updated\nto 'permanent'.\n\nThis collection contains data from:\n\n- GPM_3IMERGHH_V07 [doi:10.5067/GPM/IMERG/3B-HH-L/07](https://doi.org/10.5067/GPM/IMERG/3B-HH-L/07)\n- GPM_3IMERGHH_07 [doi:10.5067/GPM/IMERG/3B-HH/07](https://doi.org/10.5067/GPM/IMERG/3B-HH/07)\n\nBands\n\n\n**Pixel Size**\n\n11132 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Pixel Size | Description |\n|----------------------------------|---------------------|--------|--------|------------|-------------------------------------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `MWobservationTime` | min. into half hour | 0\\* | 29\\* | meters | PMW source time |\n| `MWprecipSource` | | | | meters | PMW source sensor identifier |\n| Bitmask for MWprecipSource - Bits 0-3: PMW source sensor identifier - 0: No observation - 1: TMI - 2: (unused) - 3: AMSR - 4: SSMI - 5: SSMIS - 6: AMSU - 7: MHS - 8: SAPHIR - 9: GMI - 10: (unused) - 11: ATMS - 12: AIRS - 13: TOVS - 14: CRIS ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n| `MWprecipitation` | mm/hr | 0\\* | 120\\* | meters | merged PMW precipitation |\n| `IRinfluence` | % | 0\\* | 100\\* | meters | Kalman filter weight for IR |\n| `IRprecipitation` | mm/hr | 0\\* | 79.5\\* | meters | IR precipitation |\n| `precipitation` | mm/hr | 0\\* | 174\\* | meters | snapshot precipitation - calibrated |\n| `precipitationUncal` | mm/hr | 0\\* | 120\\* | meters | snapshot precipitation - uncalibrated |\n| `probabilityLiquidPrecipitation` | % | 0\\* | 100\\* | meters | probability of liquid precipitation phase |\n| `randomError` | mm/hr | 0.24\\* | 250\\* | meters | calibrated-precipitation random error |\n\n\\* estimated min or max value\n\nTerms of Use\n\n**Terms of Use**\n\nAll NASA-produced data from the GPM mission is made freely available for the public to use.\n\nCitations \nCitations:\n\n- Huffman, G.J., E.F. Stocker, D.T. Bolvin, E.J. Nelkin, Jackson Tan (2019),\n GPM IMERG Final Precipitation L3 Half Hourly 0.1 degree x 0.1 degree V06,\n Greenbelt, MD, Goddard Earth Sciences Data and Information Services Center\n (GES DISC), Accessed: \\[Data Access Date\\],\n [doi:10.5067/GPM/IMERG/3B-HH/07](https://doi.org/10.5067/GPM/IMERG/3B-HH/07)\n\nDOIs\n\n- \u003chttps://doi.org/10.5067/GPM/IMERG/3B-HH-L/07\u003e\n- \u003chttps://doi.org/10.5067/GPM/IMERG/3B-HH/07\u003e\n\nExplore with Earth Engine **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\nCode Editor (JavaScript) \n\n```javascript\n// GPM V7 30 minute data for a single day.\nvar range = ee.Date('2019-09-03').getRange('day');\nvar dataset = ee.ImageCollection('NASA/GPM_L3/IMERG_V07')\n .filter(ee.Filter.date(range));\n\n// Select the max precipitation and mask out low precipitation values.\nvar precipitation = dataset.select('precipitation').max();\nvar mask = precipitation.gt(0.5);\nvar precipitation = precipitation.updateMask(mask);\n\nvar palette = [\n '000096','0064ff', '00b4ff', '33db80', '9beb4a',\n 'ffeb00', 'ffb300', 'ff6400', 'eb1e00', 'af0000'\n];\nvar precipitationVis = {min: 0, max: 15, palette: palette};\nMap.addLayer(precipitation, precipitationVis, 'Precipitation (mm/hr)');\nMap.setCenter(-76, 33, 3);\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/NASA/NASA_GPM_L3_IMERG_V07) \n[GPM: Global Precipitation Measurement (GPM) Release 07](/earth-engine/datasets/catalog/NASA_GPM_L3_IMERG_V07) \nGlobal Precipitation Measurement (GPM) is an international satellite mission to provide next-generation observations of rain and snow worldwide every three hours. The Integrated Multi-satellitE Retrievals for GPM (IMERG) is the unified algorithm that provides rainfall estimates combining data from all passive-microwave instruments in the GPM Constellation. This algorithm is intended ... \nNASA/GPM_L3/IMERG_V07, climate,geophysical,gpm,imerg,jaxa,nasa,precipitation,weather \n2000-06-01T00:00:00Z/2025-08-31T02:30:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.5067/GPM/IMERG/3B-HH/07](https://doi.org/https://doi.org/10.5067/GPM/IMERG/3B-HH/07)\n- [https://doi.org/10.5067/GPM/IMERG/3B-HH/07](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/NASA_GPM_L3_IMERG_V07)"]]
