Reliability Analysis Based on Air Quality Characteristics in East Asia Using Primary Data from the Test Operation of Geostationary Environment Monitoring Spectrometer (GEMS)

Air pollutants adversely affect human health, and thus a global improvement in air quality is urgent. A Geostationary Environment Monitoring Spectrometer (GEMS) was mounted on the geostationary Chollian 2B satellite 2020 to observe spatial distribution of pollution, sequential observations have been released since July 2022. The reliability GEMS must be analyzed because it first payload Earth orbit trace gases. This study initial results such as aerosol optical depth vertical column densities (VCD) ozone (O3), nitrogen dioxide (NO2), sulfur (SO2), formaldehyde (HCHO), compared them with previous studies. correlation coefficient O3 ranged from 0.90 (Ozone Instrument, OMI) 0.97 (TROPOspheric TROPOMI), whereas that NO2 0.47 (winter, OMI OMPS) 0.83 (summer, TROPOMI). yielded higher VCD than TROPOMI. Based sources NO2, observed maximum at different time (3–4 h) ground observations. Overall, can make several times day potential tool for atmospheric environmental analysis.