MLS/Aura Level-2 Ozone Mixing Ratio

MLS/Aura Level-2 Ozone Mixing Ratio, distributed as ML2O3, is NASA's standard ozone product from the Aura Microwave Limb Sounder ^[1]. 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 ^[1]. 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 ^[1]. 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 ^[1].