GHGSat Inc.

GHGSat Inc. is a commercial Earth observation operator and analytics company headquartered in Montreal, Canada, founded by Stephane Germain. The company owns and operates a constellation of satellites dedicated to greenhouse gas emission monitoring.^[1] As of late 2025, the constellation comprised 15 satellites on orbit, including two additional satellites (Teodor C14 and Laila C15) launched in autumn 2025.^[2]

Each satellite carries a Wide-Angle Fabry-Perot (WAF-P) imaging spectrometer operating in the SWIR band (1600-1700 nm) for methane (CH4) column density retrieval; CO2 measurement is also supported. Spatial resolution is approximately 30 m, with a detection threshold of approximately 100 kg/hr for methane. The first demonstration satellite, Claire/W, launched in June 2016; the first operational satellite, GHGSat-C1 Iris, launched in September 2020.^[3] Eleven or more satellites in the constellation were built by the Space Flight Laboratory (SFL) at the University of Toronto Institute for Aerospace Studies, with two additional satellites ordered in November 2025.^[4]

In 2024, GHGSat observed more than 4 million industrial facilities across 110 countries and detected over 20,000 emissions events. Data products include facility-level CH4 and CO2 plume attribution, emission rate quantification, and compliance reporting data. Key customers include major oil and gas operators; government partners include the UK Space Agency. The company received CAD 20 million from Sustainable Development Technology Canada in December 2021.^[4]