New satellite instruments and remote sensing techniques are enabling advances in spatial, temporal, and vertical characterization of air quality. The integrated observing system for air quality brings together satellite observations with ground-based monitoring, aircraft observations, and models to advance our understanding of atmospheric composition for societal benefit. Observations from OMI and TROPOMI provide long-term and high sensitivity/spatial resolution, respectively. Diurnal observations are available from GEMS, TEMPO and soon from Sentinel-4, with follow-on missions planned ~2030s. Maximizing the science, applications, and societal benefit from these new capabilities requires integration with ground-based in situ and remote-sensing (Pandora, AERONET, lidars), airborne observations, and models. We invite submissions including but not limited to: Satellite mission results/status updates; Field campaigns prototyping satellite capabilities; Satellite column-to-surface proxies; Data assimilation/inverse methods/data fusion to improve forecasting, emissions inventories, etc.; Modeling the observing system; PBL characterization/relationship to pollution; Downscaling to local scales relevant for health studies; Understanding pollutant trends.