August 16, 2022

The Korea Aerospace Research Institute announced that the world’s first geostationary environmental monitoring satellite Cheollian 2b was made with domestic technology.

The Ministry of Science and ICT said in February that the satellite would enter a 128.2 degree geostationary orbit at the Guiana Space Center in French Guiana. Geostationary orbit is a circular orbit that continuously observes the same area almost 36,000 km from the equator along the direction of Earth’s rotation.

The main task of the Cheollian 2B is to collect observational data on the ocean and environment of East Asia, including the Korean Peninsula, such as fine dust and red tide movement. For this task, the satellite is equipped with the world’s first Gostationary Environmental Monitoring Spectrometer (GMS) and the improved and improved Global Ocean Color Imager-2 (GOCI-2) of the Cheollian 1, released in 2010.

NASA in the United States and the European Space Agency are also developing geostationary-environment satellites equipped with GEMS, but are expected to launch in two to three years.

GEMS is a high-precision optical device used to monitor fine dust in the air. Cheollian 2B is capable of collecting data on more than 20 types of air pollutants from Japan to East and West in East Asia and from northern Indonesia and southern Mongolia.

The imager GOCI observes real-time marine disasters including red tide and tidal currents. Thanks to the more advanced GOCI-2, the Cheollian 2B can monitor much higher optical resolution and more types of calculated data than the Cheollian 1, supporting marine environmental protection and maritime safety and marine resource management.

From 2021, observational data on fine dust will be released to the public one year after the launch of the satellite, and data collection will begin next October. In addition, in 2021, air pollutant emissions and long-distance air pollutant concentrations in East Asia, including Korea, can be checked via mobile video.