Satellite Constellation

GHGSat-C10 “Vanguard,” launched in November 2023 aboard SpaceX’s Falcon 9, is the world’s first commercial satellite capable of measuring carbon dioxide emissions from individual industrial facilities at high resolution.

While existing public CO₂ satellites operate at kilometre-scale resolution—unable to attribute emissions to specific sites—Vanguard measures at 25 m, enabling direct attribution to steel mills, cement plants, power stations, and petrochemical complexes anywhere in the world. GHGSat pioneered methane in 2016 in the carbon dioxide monitoring space, opening a new frontier for emissions verification, regulatory reporting, and confidence in the global carbon trading market.

In July 2026, GHGSat successfully launched Eleonore (C-16) and Nuray (C-17) to expand the world’s largest methane-monitoring fleet. Purpose-built to help operators and governments mitigate emissions, the constellation delivers the daily revisit capabilities and faster cadence needed to turn data into immediate action.

With these satellites now in orbit, CEO Stephane Germain highlights an unmatched capability for more frequent observations and actionable intelligence.

In November 2025, GHGSat launched Teodor (C-14) and Laila (C-15) aboard SpaceX’s Transporter-15 rideshare mission, as world leaders strengthened international methane reduction frameworks under the Global Methane Pledge. Following GHGSat tradition, both satellites are named after employees’ children, reflecting the company’s conviction that the work being done today is ultimately for the next generation. The two new spacecraft brought GHGSat’s total to 16 satellites in orbit, further boosting daily monitoring capacity across asset-dense regions worldwide.

In June 2025, GHGSat launched Pierre (C-12) and Valmay (C-13) aboard SpaceX’s Transporter-14 rideshare mission from Vandenberg Space Force Base. With their addition, GHGSat reached 14 satellites in orbit and, for the first time, the unique capability to monitor methane emissions from carbon-intensive industries on a true daily basis. As with every satellite in the constellation, Pierre and Valmay carry GHGSat’s patented wide-angle Fabry-Pérot spectrometer, detecting super-emitter events above 100 kg/hr and tracing their source to individual pieces of industrial equipment.

In November 2023, we launched GHGSat C-10 “Vanguard”, the first high-resolution sensor dedicated to detecting carbon dioxide emissions from hard-to-abate industries such as cement and steel works. Travelling alongside Vanguard on board the SpaceX Transporter-9 rideshare mission were two new methane detectors: GHGSat C-9 (‘Juba’) and C-11 (‘Elliot’). The GHGSat sensor payloads were built by ABB in Canada and integrated into satellites designed, built and operated by Spire Global.

GHGSat successfully launched three new high-resolution methane emissions monitoring satellites in April 2023, taking the company’s constellation to nine satellites in orbit.

GHGSat’s Mey-Lin (C6), Gaspard (C7) and Oceane (C8) travelled on board a SpaceX Transporter-7 rideshare mission from the Vandenberg Space Force Base, California. All three satellites separated from the vehicle approximately 63 minutes after lift-off.

In May 2022, GHGSat doubled its satellite monitoring capability with the launch of GHGSat-C3 “Luca,” C4 “Penny,” and C5 “Diako” on SpaceX’s Transporter-5 mission. This launch further developed GHGSat’s constellation of greenhouse gas-detecting satellites, with 6 in orbit and 6 more to be added in 2023.

GHGSat is the only organization in the world capable of detecting methane emissions from sources 100 times smaller than those detected by other satellites by using a resolution 100 times greater than other systems. This means that GHGSat can identify and quantify methane emissions from point sources as small as oil and gas wells.

GHGSat-C2 “Hugo” was one of the satellites on the world record-setting SpaceX Transporter-1 rideshare mission. Lifting off from Cape Canaveral Space Force Station aboard a SpaceX Falcon 9 rocket on January 24th, 2021. This launch represents the third satellite deployed by GHGSat as part of our growing satellite constellation.

Hugo delivered his ‘first light image‘ – the satellite’s first image of a methane plume over Central Asia less than a week after launch.

GHGSat C1 “Iris” was successfully launched into space on September 2nd, 2021. Iris was aboard the Arianespace Vega VV16 rocket rideshare mission that lifted off from Kourou in French Guiana. A few weeks later, on October 8th, Iris captured a methane emission from space with a controlled release in Alberta, Canada, and proved she had a performance 5x better than our technology demonstrator satellite, “Claire.”

GHGSat-D “Claire” is our first satellite and the spacecraft that proved our ground-breaking sensor technology could deliver high-resolution greenhouse gas emissions observations from space. Claire was developed, built and tested over two years and successfully launched into orbit on June 21st, 2016.

She is still working hard today, and everything we learned from her early observations helped us improve the technology of our commercial satellite constellation.