First Satellite in Global Air Quality Constellation Launches

news image
Special Stories
25 Feb 2020 2:00 AM
[An Arianespace Ariane 5 rocket carrying South Korea's Geostationary Environment Monitoring Spectrometer (GEMS) instrument launches Tuesday, Feb. 18, from the Guiana Space Center in French Guiana. Credits: Courtesy of Arianespace] [From NASA]   South Korea's Geostationary Environment Monitoring Spectrometer (GEMS) instrument on the Korean Aerospace Research Institute GEO-KOMPSAT-2B satellite recently launched into orbit aboard an Arianespace Ariane 5 rocket Tuesday, Feb. 18, from the Guiana Space Center in French Guiana. A sister instrument to NASA's Tropospheric Emissions: Monitoring of Pollution (TEMPO), GEMS will be the first satellite instrument in a constellation of three satellite instruments that will revolutionize the way scientists observe air quality over significant swaths of the Northern Hemisphere. GEMS will monitor atmospheric gases over Asia hourly during daytime from a geostationary, or fixed, orbit over the equator. This marks a significant leap forward in scientists' ability to monitor air pollution from space. [The Geostationary Environment Monitoring Spectrometer (GEMS) is designed to provide measurements of air quality over South Korea and the greater Asia-Pacific region by measuring tropospheric pollution from space. The GEMS 10-year mission will investigate chemical concentrations critical to air quality, such as nitrogen dioxide, sulfur dioxide, formaldehyde, ozone, and other aerosols.] GEMS is nearly identical to TEMPO, which is scheduled to launch into geostationary orbit in 2022 as a payload on Intelsat 40e. TEMPO will make hourly daytime measurements of air quality over North America. Both GEMS and TEMPO were built by Ball Aerospace in Boulder, Colorado. The European Space Agency's Sentinel-4, currently in development, will observe air quality over Europe. All three instruments will provide data products that will improve scientists' ability to understand and forecast air quality around the Northern Hemisphere.
All Weather News
More
River Levels Expected to Rise Again in the Northwest

River Levels Expected to Rise Again in the Northwest

NORTHWEST - A state of emergency was declared

16 Dec 2025 11:40 AM
Next Blast of Arctic Air Arrives Late Week

Next Blast of Arctic Air Arrives Late Week

It's been a cold start to the week for millio

16 Dec 2025 11:35 AM
Rainy System To Move Over Snow

Rainy System To Move Over Snow

NORTHERN PLAINS - On Wednesday, a low-pressur

16 Dec 2025 11:00 AM
Record Warmth Out West Continues

Record Warmth Out West Continues

Unseasonably warm temperatures are continuing

16 Dec 2025 10:45 AM
End of Year Travel Expected to Break Records

End of Year Travel Expected to Break Records

As 2025 comes to an end, many people are expe

16 Dec 2025 7:45 AM
Arctic Blast Settles into the Southeast

Arctic Blast Settles into the Southeast

Rounds of arctic air have been funneling in f

15 Dec 2025 4:15 PM
Breaking Out the Shovels in the Northeast

Breaking Out the Shovels in the Northeast

So far this winter season, the major cities a

15 Dec 2025 1:20 AM