# MLS/Aura Level-2 Ozone Mixing Ratio
*data products*

## Specifications
- **level**: L2
- **distributor**: nasa
- **access endpoint**: https://www.earthdata.nasa.gov/data/catalog/ges-disc-ml2o3-006
- **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-ml2o3-006
- **use cases**: ["ozone profile","stratospheric ozone monitoring","limb sounding"]
- **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":"L2","distributor":"nasa","access_endpoint":"https://www.earthdata.nasa.gov/data/catalog/ges-disc-ml2o3-006","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-ml2o3-006","use_cases":"[\"ozone profile\",\"stratospheric ozone monitoring\",\"limb sounding\"]","deployment_context":"orbital"}
- **relevance**: in-scope

## Editorial
MLS/Aura Level-2 Ozone Mixing Ratio, distributed as ML2O3, is NASA's standard ozone product from the Aura Microwave Limb Sounder [^nasa-ml2o3]. It is derived from 240 GHz radiances and provides near-global ozone profile coverage for limb-sounding workflows focused on stratospheric ozone structure and vertical variability [^nasa-ml2o3]. The documented useful vertical range is 261 to 0.001 hPa, making the product relevant for users who need pressure-level ozone mixing ratio profiles rather than total-column maps [^nasa-ml2o3]. NASA distributes ML2O3 Version 006 through GES DISC as an open Earthdata product, supporting repeatable access for atmospheric-composition studies, validation work, and model comparison [^nasa-ml2o3].

## Compositional position
- ozone-stratosphere (topics) --[topic_capabilities]--> MLS/Aura Level-2 Ozone Mixing Ratio

## Sources
- [nasa-ml2o3] | MLS/Aura Level 2 Ozone Mixing Ratio V006, NASA Earthdata | https://www.earthdata.nasa.gov/data/catalog/ges-disc-ml2o3-006 | tier=agency-doc | accessed=2026-06-13

---
Source: https://eo-atlas.org/data_products/mls-aura-l2-o3
Maintainer: SpectraWorks B.V. (CC-BY 4.0)