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
Tropics: Tracking Hurricane Polo in the Pacific

Tropics: Tracking Hurricane Polo in the Pacific

The Pacific Ocean has been incredibly active

22 Sep 2026 1:05 AM
More Flooding Concerns Out East

More Flooding Concerns Out East

WHAT TO EXPECTRecord rainfall fell this weeke

22 Sep 2026 1:05 AM
Severe Threat Continues In The Southeast

Severe Threat Continues In The Southeast

WHAT TO EXPECTSevere storms developed this af

22 Sep 2026 1:00 AM
Coastal Low Expected to Impact Northeast Late Week

Coastal Low Expected to Impact Northeast Late Week

Looking ahead, the forecast alludes to a stre

22 Sep 2026 1:00 AM
Storms Continue to Pummel the Rockies

Storms Continue to Pummel the Rockies

Severe storms and heavy rain have been target

21 Sep 2026 1:25 AM
Finally Cooling Down; Cold Front Arrives Just in Time for Fall

Finally Cooling Down; Cold Front Arrives Just in Time for Fall

It's been a long, hot summer. That might be a

20 Sep 2026 1:25 PM
Lake Powell Drops to Record Low

Lake Powell Drops to Record Low

The second largest reservoir in the United St

20 Sep 2026 8:05 AM