Seminar

Abstract

GEO-KOMPSAT is a geostationary program of the Korea Aerospace Research Institute (KARI)'s Korea Multi-Purpose SATellite(KOMPSAT) to observe atmosphere and ocean. GEO-KOMPSAT-1, also known as COMS (Communication, Oceanography and Meteorology Satellite) was launched in June 27, 2010, with conventional 5-channel MI (Meteorological Imager) and 8-channel GOCI (Geostationary Ocean Color Imager). GOCI is the first ocean color imager in geostationary orbit, with the spatial resolution of 500 m. These two instruments have provided information on aerosol in high temporal and spatial resolution over East Asia in terms of optical depth, size and type classification. Algorithm uses clear-sky composite to estimate surface reflectance, and takes dynamic aerosol model and nonsphericity into consideration.

GEO-KOMPSAT-2 is planned for launch in 2018 as twin satellites, 2A as weather and 2B as atmospheric environment and ocean satellite, with a 16-channel AMI (Advanced Meteorological Imager), a UV-Visible scanning spectrometer, GEMS (Geostationary Environment Spectrometer), and GOCI-2 (Geostationary Ocean Color Imager-2). GEMS measures ozone, aerosol and their precursors including NO₂, and SO₂. Synchronous measurements of atmospheric composition together with the meteorological variables and ocean color information are expected to contribute to better understanding on the distribution and transboundary transportation of air pollution, and on interactions between meteorology and air chemistry in the Asia-Pacific region. This mission is expected to improve the accuracy of air quality forecasting and reduce current discrepancy between the model and observation. Furthermore, the constellation of the GeoKOMPSAT with the NASA Tropospheric Emissions: Monitoring of Pollutions (TEMPO) over North America and the ESA Senteniel-4 UV-Visible-NIR (UVN) spectrometer over Europe in 2017- 2020 time frame can result in great synergistic outcomes including enhancing significantly our understanding in globalization of tropospheric pollution.