MERRA-2 Monthly Gridded Innovations and Observations SNDR_G12_PREP 0.5 x 0.625 degree V1 (M2_SNDR_G12_PREP)
The MERRA-2 Gridded Innovations and Observations (GIO) dataset provides assimilated observations and key statistics generated during observational data assimilation. GIO data are created by binning observations and innovations onto grids consistent with MERRA-2 specifications and storing them in NetCDF format for convenient access. This dataset serves multiple purposes: it shows which data was assimilated (where and when), enables systematic evaluation of observing system impacts in reanalysis, provides a resource for teaching data assimilation concepts, and offers training data for machine learning and artificial intelligence applications.
This collection includes monthly mean and standard deviation values for brightness temperature (mean_obs, stdv_obs) from satellite sensor SNDR_G12_PREP along with observation data counts (nobs_obs), and assimilation statistics, including: (a) forecast departure, or observation minus forecast (OmF) (mean_omf, stdv_omf); (b) analysis departure, or observation minus analysis (OmA) (mean_oma, stdv_oma); and (c) bias corrections for satellite radiances (mean_bias, stdv_bias).
Resources
8 resources available
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Original Metadata
ISO -
Resource 2
HTML -
Resource 3
BIN -
Resource 4
PNG -
Resource 5
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BIN
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Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | public |
| bureauCode |
[ "026:00" ] |
| contactPoint |
{ "fn": "Earthdata Forum", "@type": "vcard:Contact", "hasEmail": "mailto:earthdata-support@nasa.gov" } |
| description | The MERRA-2 Gridded Innovations and Observations (GIO) dataset provides assimilated observations and key statistics generated during observational data assimilation. GIO data are created by binning observations and innovations onto grids consistent with MERRA-2 specifications and storing them in NetCDF format for convenient access. This dataset serves multiple purposes: it shows which data was assimilated (where and when), enables systematic evaluation of observing system impacts in reanalysis, provides a resource for teaching data assimilation concepts, and offers training data for machine learning and artificial intelligence applications. This collection includes monthly mean and standard deviation values for brightness temperature (mean_obs, stdv_obs) from satellite sensor SNDR_G12_PREP along with observation data counts (nobs_obs), and assimilation statistics, including: (a) forecast departure, or observation minus forecast (OmF) (mean_omf, stdv_omf); (b) analysis departure, or observation minus analysis (OmA) (mean_oma, stdv_oma); and (c) bias corrections for satellite radiances (mean_bias, stdv_bias). |
| distribution |
[ { "@type": "dcat:Distribution", "title": "Original Metadata", "format": "ISO", "mediaType": "text/xml", "conformsTo": "http://www.isotc211.org/2005/gmi", "description": "The metadata's original source.", "downloadURL": "https://cmr.earthdata.nasa.gov/search/concepts/C3944483942-GES_DISC.iso19115" }, { "@type": "dcat:Distribution", "format": "HTML", "mediaType": "text/html", "downloadURL": "https://disc.gsfc.nasa.gov/datacollection/M2_SNDR_G12_PREP_1.html" }, { "@type": "dcat:Distribution", "format": "BIN", "mediaType": "application/octet-stream", "downloadURL": "https://disc.gsfc.nasa.gov/datasets?keywords=%2522MERRA2OBS%2522" }, { "@type": "dcat:Distribution", "format": "PNG", "mediaType": "image/png", "downloadURL": "https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/M2_SNDR_G12_PREP_1.png" }, { "@type": "dcat:Distribution", "format": "PDF", "mediaType": "application/pdf", "downloadURL": "https://docserver.gesdisc.eosdis.nasa.gov/public/project/MEaSUREs/MERRA2_OBS/README.MERRA2-OBS.pdf" }, { "@type": "dcat:Distribution", "format": "BIN", "mediaType": "application/octet-stream", "downloadURL": "https://gmao.gsfc.nasa.gov/" }, { "@type": "dcat:Distribution", "format": "PDF", "mediaType": "application/pdf", "downloadURL": "https://gmao.gsfc.nasa.gov/media/publications/zbly36ziNFDQeVqPhUoFbmYmvh/MERRA-2_GIO_File_Specification-Office_Note_v1.0__2Xts4xu.pdf" }, { "@type": "dcat:Distribution", "format": "BIN", "mediaType": "application/octet-stream", "downloadURL": "https://measures.gesdisc.eosdis.nasa.gov/data/MERRA2_OBS/M2_SNDR_G12_PREP.1/" } ] |
| identifier | 10.5067/MEASURES/MERRA2_SNDR_G12_PREP |
| keyword |
[ "earth-science-atmospheric-temperature-atmosphere", "earth-science-infrared-wavelengths-spectral-engineering-brightness-temperature", "earth-science-microwave-spectral-engineering-brightness-temperature" ] |
| license | https://www.usa.gov/government-works |
| modified | 2026-08-25 |
| programCode |
[ "026:000" ] |
| publisher |
{ "name": "NASA/GSFC/SED/ESD/TISL/GESDISC", "@type": "org:Organization" } |
| spatial |
"["CARTESIAN", [{"WestBoundingCoordinate": -180, "NorthBoundingCoordinate": 90, "EastBoundingCoordinate": 180, "SouthBoundingCoordinate": -90}]]"
|
| temporal | 2003-04-30/2007-12-31 |
| theme |
[ "Earth Science" ] |
| title | MERRA-2 Monthly Gridded Innovations and Observations SNDR_G12_PREP 0.5 x 0.625 degree V1 (M2_SNDR_G12_PREP) |
