# GHGSat constellation
*missions*

## Specifications
- **operator**: ghgsat
- **actual launch**: 2016-06-22
- **current status**: operational
- **orbit type**: Sun-synchronous orbit, approximately 500 km, 97.5 deg inclination
- **swath km**: 12
- **revisit days**: 1
- **tasking supported**: true
- **archive depth years**: 10
- **current geographic priority**: Global facility-scale industrial greenhouse-gas sources
- **launch vehicle**: arianespace-vega
- **entity type**: mission
- **last verified date**: 2026-06-14
- **verified by**: operator
- **claim status**: claimed
- **provider**: ghgsat
- **attributes**: {"operator":"ghgsat","actual_launch":"2016-06-22","current_status":"operational","orbit_type":"Sun-synchronous orbit, approximately 500 km, 97.5 deg inclination","swath_km":12,"revisit_days":1,"tasking_supported":true,"archive_depth_years":10,"current_geographic_priority":"Global facility-scale industrial greenhouse-gas sources","launch_vehicle":"arianespace-vega"}

## Editorial
The GHGSat constellation is a commercial fleet of small satellites operated by GHGSat Inc. for facility-scale greenhouse gas monitoring, with the first satellite (GHGSat-D, also called Claire) launched on 2016-06-22 into a sun-synchronous orbit at approximately 500 km altitude.[^wmo-ghgsat][^ghgsat-d-amt-2021] The constellation uses wide-angle Fabry-Perot spectrometers and SWIR absorption to measure methane and CO2 column concentrations at sub-facility spatial resolution (12 km swath, better than 50 m ground sampling on later satellites), enabling quantification of emissions from individual industrial sites including oil and gas facilities, coal mines, and landfills.[^ghgsat-d-amt-2021][^ghgsat-media-2023] Data products support matched-filter plume detection and flux estimation from identified emission sources.[^ghgsat-d-amt-2021] The constellation has grown through successive launches; by late 2025 the fleet included at least 15 satellites, with Teodor (C-14) and Laila (C-15) launched later that year.[^ghgsat-c14-c15-launch][^wmo-ghgsat] Tasking is commercially available. The exact operational count at any given date changes with the company's ongoing launch programme; per-satellite commissioning dates after launch are not detailed in public records.

## Compositional position
- GHGSat constellation --[mission_payloads]--> ghgsat-waf-p (products)
- GHGSat constellation --[mission_payloads]--> ghgsat-cloud-aerosol (products)
- GHGSat constellation --[mission_payloads]--> ghgsat-vanguard-co2-sensor (products)
- GHGSat constellation --[related-topic]--> methane (topics)
- GHGSat constellation --[related-topic]--> co2 (topics)
- GHGSat constellation --[related-topic]--> industrial-emissions (topics)
- GHGSat constellation --[related-topic]--> greenhouse-gas-flux (topics)
- GHGSat constellation --[related]--> ghgsat (companies)

## Sources
- [wmo-ghgsat] | WMO OSCAR satellite record: GHGSat | https://space.oscar.wmo.int/satellites/view/ghgsat | tier=community | accessed=2026-06-14
- [ghgsat-media-2023] | GHGSat media kit November 2023 | https://www.ghgsat.com/upload/misc/GHGSAT_MEDIA-KIT_1123.pdf | tier=operator-marketing | accessed=2026-06-14
- [ghgsat-d-amt-2021] | The GHGSat-D imaging spectrometer, Atmospheric Measurement Techniques | https://amt.copernicus.org/articles/14/2127/2021/amt-14-2127-2021.pdf | tier=peer-reviewed | accessed=2026-06-14
- [ghgsat-c14-c15-launch] | GHGSat successfully launches Teodor C-14 and Laila C-15 | https://www.ghgsat.com/en/newsroom/ghgsat-successfully-launches-two-new-satellites/ | tier=operator-press | accessed=2026-06-14

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Source: https://eo-atlas.org/missions/ghgsat
Maintainer: SpectraWorks B.V. (CC-BY 4.0)