This study presents the first global total ozone column (TOC) retrievals from the Ozone Monitoring Suite–Nadir (OMS-N) onboard China’s FengYun-3F satellite, launched in August 2023. Designed for morning-orbit observations, OMS-N provides global TOC measurements at an unprecedented spatial resolution of 7 km × 7 km, enabling improved characterization of ozone variability from regional to global scales.
A physically consistent retrieval framework was developed and applied to OMS-N measurements, and the resulting TOC products were systematically evaluated using multiple independent datasets. Validation against 33 quality-assured ground-based stations shows strong agreement, with correlation coefficients exceeding 0.9 for most sites. Inter-satellite comparisons with established ozone products from TROPOMI and GOME-2B further confirm the reliability of OMS-N, with global mean biases typically within 2% across different seasons and hemispheres.
The OMS-N observations successfully capture large-scale seasonal ozone patterns as well as key features in high-latitude regions, including Antarctic ozone depletion events. These results demonstrate that OMS-N is ready for operational, high-resolution ozone monitoring and can provide valuable support for atmospheric composition studies, climate research, and long-term ozone assessments.