# OMI/Aura TOMS-Like Total Column Ozone L3 (OMTO3e)
*data products*

## Specifications
- **level**: L3
- **distributor**: nasa
- **access endpoint**: https://www.earthdata.nasa.gov/data/catalog/ges-disc-omto3e-003
- **access model**: open
- **licence**: NASA Earthdata open access
- **cost model summary**: Open NASA Earthdata product distributed by GES DISC.
- **primary data portal url**: https://www.earthdata.nasa.gov/data/catalog/ges-disc-omto3e-003
- **use cases**: ["total ozone column","ozone-layer monitoring","daily global ozone mapping"]
- **deployment context**: orbital
- **entity type**: data_product
- **last verified date**: 2026-06-13
- **verified by**: agency-doc
- **claim status**: agency-sourced
- **provider**: nasa
- **attributes**: {"level":"L3","distributor":"nasa","access_endpoint":"https://www.earthdata.nasa.gov/data/catalog/ges-disc-omto3e-003","access_model":"open","licence":"NASA Earthdata open access","cost_model_summary":"Open NASA Earthdata product distributed by GES DISC.","primary_data_portal_url":"https://www.earthdata.nasa.gov/data/catalog/ges-disc-omto3e-003","use_cases":"[\"total ozone column\",\"ozone-layer monitoring\",\"daily global ozone mapping\"]","deployment_context":"orbital"}
- **relevance**: in-scope

## Editorial
OMI/Aura TOMS-Like Total Column Ozone L3, also distributed as OMTO3e, is an open NASA Earthdata product for daily global total ozone mapping from the Aura Ozone Monitoring Instrument [^nasa-omto3e]. It provides a Level-3 gridded product on 0.25 degree grids, making it more directly usable for spatial analysis and map-based workflows than orbit-level retrieval files [^nasa-omto3e]. The product includes total column ozone, radiative cloud fraction, and solar and viewing zenith angles, which helps users screen geometry and cloud effects when comparing ozone fields across days or regions [^nasa-omto3e]. NASA distributes the dataset through GES DISC as an open Earthdata catalogue product for ozone-layer monitoring and global ozone analysis [^nasa-omto3e].

## Compositional position
- ozone-stratosphere (topics) --[topic_capabilities]--> OMI/Aura TOMS-Like Total Column Ozone L3 (OMTO3e)

## Sources
- [nasa-omto3e] | OMI/Aura TOMS-Like Ozone and Radiative Cloud Fraction L3 OMTO3e, NASA Earthdata | https://www.earthdata.nasa.gov/data/catalog/ges-disc-omto3e-003 | tier=agency-doc | accessed=2026-06-13

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Source: https://eo-atlas.org/data_products/omi-aura-l3-total-ozone-omto3e
Maintainer: SpectraWorks B.V. (CC-BY 4.0)