MLS/Aura Near-Real-Time L2 Sulfur Dioxide (SO2) Mixing Ratio V005 (ML2SO2_NRT) at GES DISC

ML2SO2_NRT is the EOS Aura Microwave Limb Sounder (MLS) Near-Real-Time (NRT) product for sulfur dioxide (SO2). This product contains SO2 profiles derived from the 190 and 240 GHz regions. The NRT data are typically available within 3 hours of observation and are broken into files containing about 15 minutes of data. The most recent 7 days of data are available online. Spatial coverage is near-global (-82 degrees to +82 degrees latitude), with each profile spaced 1.5 degrees or ~165 km along the orbit track (roughly 15 orbits per day). The vertical coverage is from 215 to 10 hPa.

The MLS NRT algorithm uses a simplified fast forward model to meet Near Real Time data latency requirements and are therefore not as accurate as the retrievals that constitute the standard MLS products. Nevertheless the results are scientifically useful in selected regions of the Earth's atmosphere provided that the data are screened according to the recommendations in the MLS NRT User Guide and the MLS L2 Data Quality Document for Standard Products.

Data and Resources

Additional Info

Field Value
Maintainer NATHANIEL LIVESEY
Last Updated July 17, 2025, 14:23 (UTC)
Created March 31, 2025, 14:01 (UTC)
accessLevel public
bureauCode {026:00}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://data.nasa.gov/data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
citation EOS MLS Science Team. 2022-01-11. ML2SO2_NRT. Version 005. MLS/Aura Near-Real-Time L2 Sulfur Dioxide (SO2) Mixing Ratio V005. Greenbelt, MD, USA. Archived by National Aeronautics and Space Administration, U.S. Government, Goddard Earth Sciences Data and Information Services Center (GES DISC). https://disc.gsfc.nasa.gov/datacollection/ML2SO2_NRT_005.html. Digital Science Data.
creator EOS MLS Science Team
data-presentation-form Digital Science Data
graphic-preview-description Aura MLS logo
graphic-preview-file https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/ML2SO2_NRT_003.jpeg
harvest_object_id 7e53868a-1a67-4112-8170-dcaed000b18e
harvest_source_id 61638e72-b36c-4866-9d28-551a3062f158
harvest_source_title DNG Legacy Data
identifier C2131772275-GES_DISC
issued 2021-09-21
landingPage https://cmr.earthdata.nasa.gov:443/search/concepts/C2131772275-GES_DISC.html
language {en-US}
metadata_type geospatial
modified 2021-09-21
programCode {026:001}
publisher NASA/GSFC/SED/ESD/GCDC/GESDISC
release-place Greenbelt, MD, USA
resource-type Dataset
series-name ML2SO2_NRT
source_datajson_identifier true
source_hash af2507db0d5e0ed74a3102db4c6643ccfa0a694685c9d5c079ea9d27a9597f7a
source_schema_version 1.1
spatial -180.0 -82.0 180.0 82.0
temporal 2021-09-21T00:00:00Z/2023-02-28T00:00:00Z
theme {Aura,LANCE,geospatial}