MERRA-2 Monthly Gridded Innovations and Observations SSU_N11 0.5 x 0.625 degree V1 (M2_SSU_N11) at GES DISC

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 SSU_N11 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).

Data and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated June 23, 2026, 02:53 (UTC)
Created June 2, 2026, 22:08 (UTC)
accessLevel public
bureauCode {026:00}
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
harvest_object_id 5a315aae-238a-4aa7-9919-4c16ca03a8d7
harvest_source_id b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title Science Discovery Engine
identifier 10.5067/MEASURES/MERRA2_SSU_N11
license https://www.usa.gov/government-works
modified 2026-06-15T22:16:02Z
programCode {026:000}
publisher NASA/GSFC/SED/ESD/TISL/GESDISC
resource-type Dataset
source_datajson_identifier true
source_hash deeaf042332f2e6a3794f9cebfc709fbf501aebda764c97dff075eee1e7b61ec
source_schema_version 1.1
spatial ["CARTESIAN", [{"WestBoundingCoordinate": -180, "NorthBoundingCoordinate": 90, "EastBoundingCoordinate": 180, "SouthBoundingCoordinate": -90}]]
temporal 1987-09-30/1999-02-28
theme {"Earth Science"}