Geostationary Environment Monitoring Spectrometer 

Early warnings 

Our GEMS instrument will help to improve early warnings for dangerous pollution events across the Asia-Pacific region and also monitor long-term climate change. 

A geostationary scanning ultraviolet-visible spectrometer, GEMS will monitor trans-boundary pollution events for the Korean peninsula and Asia-Pacific region. Our instrument provides high spatial and temporal resolution hourly measurements of ozone, its precursors and aerosols.

Artist illustration of GEMS spacecraft
Artist illustration of the GEMS spacecraft

What we’re doing

Instrument provider

Ball Aerospace built GEMS under a commercial contract with the Korea Aerospace Research Institute (KARI) for the National Institute of Environmental Research in the Ministry of Environment of South Korea. Together, Ball and KARI engineers designed, fabricated and tested the GEMS instrument. Integrated onto KARI's GEO-KOMPSAT-2B satellite, GEMS launched successfully on February 18, 2020.  

GEMS is the Asian element of a global air quality monitoring constellation of geostationary satellites that includes the Tropospheric Emissions: Monitoring of Pollution (TEMPO) spectrometer. We’re building TEMPO for NASA Langley Research Center and Harvard Smithsonian Astrophysical Observatory. Both GEMS and TEMPO leverage our know-how and the tech we’ve developed for earlier ultraviolet-visible instruments. 

Contact Ball

Find out more about how our co-development instrument approach saves time & schedule.