GREENHOUSE GAS SATELLITE MISSIONS PORTAL


Updated for 2025


Missions Case Studies


Greenhouse Gas Satellite Missions Portal

This Portal aims to provide a comprehensive and up-to-date list of all current and planned satellite missions with the ability to measure greenhouse gases. This includes those planned and operated by both public and commercial organisations, as well as NGOs. The Portal is based on data from the CEOS MIM Database and aims to support the analysis and planning of GHG measurement continuity by providing visualisation and export capabilities such as measurement timelines and tables of missions and instruments. The CEOS Database team will undertake to ensure the Portal is both comprehensive and current so that it may be applied with confidence for these studies.

Missions are categorised under three headings according to their purpose and capabilities.

The Portal aims to support coordination and planning of initiatives world-wide that are seeking to exploit these valuable data in support of emission reduction measures. It should assist those researching which data sources may be suitable for their information needs and can provide a basis for the high-level coordination needed among space agencies and other data providers to ensure that society has continuity of these key measurements into the future in support of our long-term climate data records and processes such as the Global Stocktake of the Paris Agreement.

At the heart of the Paris Agreement is an understanding that governments will develop and meet GHG emission reduction targets. The global community recognises the need for urgent and collective actions on the mitigation of GHG emissions if we are to limit global warming. Data and knowledge of global GHG emissions, trends and sources will become increasingly important to support national and international climate policymaking. Transparent reporting processes will demand more and better data to satisfy society's needs, and satellite Earth observation (EO) has the potential to play a critical role to support policymakers at the intersection between science and action. EO satellites are increasingly capable of monitoring GHG emissions with precision, accuracy, resolution, and coverage needed to support policymakers at all levels, from the sub-national and national level for the establishment and operation of national GHG inventories, through to the global reconciliation and accounting processes that will seek to match aggregated national reports with the latest global observations. Refer to the CEOS Global Stocktake Portal for more information on relevant datasets.

The GHG Constellation Builder linked below has been created to help users identify a constellation of satellites which meets their specific requirements. Simply make a copy of the spreadsheet and use the filters to tailor a solution.

This resource is a product of the overall Greenhouse Gas Roadmap being implemented by CEOS and CGMS agencies.

Explore GHG Constellation Builder Download Timelines
Carbon Dioxide and Methane Observing Satellites [Source: acp.copernicus.org, Credit: GeoSapient]

GHG Mission Timelines

Global GHG Mappers
Wide Area CO2 and CH4 Emission Monitoring GHG Missions Timeline
Wide Area CO2 Emission Monitoring GHG Missions Timeline
Wide Area CH4 Emission Monitoring GHG Missions Timeline
Facility Scale Plume Monitors
Facility Scale CO2 and CH4 Emission Monitoring GHG Mission Timeline
Facility Scale CO2 Emission Monitoring GHG Mission Timeline
Facility Scale CH4 Emission Monitoring GHG Mission Timeline
NGO: Non-Governmental Organisation Mission
Govt: Governmental Mission
Comm: Commercial Mission
Paid: Data available for a fee
Open: Data publicly available
Limited: Some constraints to data access

Global GHG Mappers

Typically undertaken by CEOS space agencies, these missions are the most important sources of information for tracking emissions and removals of GHGs from natural as well as anthropogenic sources and sinks on spatial scales spanning large urban areas to nations. These sensors typically do not have the spatial resolution to attribute emissions from individual facilities but are the only sensors with the precision and accuracy needed to track fluxes from diffuse sources of CO2 from the biosphere and oceans, and of methane from natural wetlands and agricultural lands. Data from Global GHG Mappers are being used in national inventory development and to assess the completeness and accuracy of country reporting to the UNFCCC.
CO2M
CO2M
Open
Govt
CO2
CH4


The Copernicus CO2M mission measures human-induced carbon dioxide and methane emissions. It deploys satellites to reduce uncertainties in fossil fuel combustion estimates at national and regional levels, offering an independent information source for policy assessment and tracking Europe's decarbonisation progress and emission reduction goals. More...

FengYun-3D
FengYun-3D
Limited
Govt
CO2
CH4


FengYun-3D is an operational meteorology mission, playing a significant role in ocean and ice monitoring, climate monitoring, atmospheric chemistry, and space weather. It retrieves greenhouse gases (GHGs) such as CH4, CO2, and other atmospheric gases. More...

FengYun-3H
FengYun-3H
Limited
Govt
CO2
CH4


FengYun-3H, the 7th flight unit of the FY-3 series, is dedicated to operational meteorology and will contribute significantly to ocean and ice monitoring, climate monitoring, atmospheric chemistry, and space weather. It will also measure concentration distributions of major greenhouse gases (CO2, CH4, etc.) in the global atmosphere. More...

Gaofen-5
Gaofen-5
Limited
Govt
CO2
CH4


Gaofen-5 is a hyperspectral mission that observes Earth's environments, tracking environmental impacts, water quality, and atmospheric changes. It measures carbon dioxide and methane in the troposphere to understand the processes affecting these greenhouse gases (GHGs). More...

GOSAT
GOSAT
Open
Govt
CO2
CH4


The GOSAT mission aims to monitor the global distribution of greenhouse gases (GHGs), including CO2 and CH4, at a subcontinental scale. Its goal is to verify the effectiveness of GHG emission reduction measures and contribute to understanding and addressing climate change challenges. More...

GOSAT-2
GOSAT-2
Open
Govt
CO2
CH4


The GOSAT-2 mission aims to extend the GHG monitoring record initiated by GOSAT. Its goal is to measure the global distribution of greenhouse gases (GHGs) such as CO2 and CH4 at a subcontinental scale, verifying the effectiveness of GHG emission reduction efforts. More...

GOSAT-GW
GOSAT-GW
Open
Govt
CO2
CH4


The mission's goal is to monitor Greenhouse gases (GHGs) like carbon dioxide and methane in the atmosphere, aiding in understanding climate change rates. Additionally, it seeks to enhance our understanding of the water cycle, which plays a crucial role in Numerical Weather Prediction (NWP) and climate modeling. More...

MERLIN
MERLIN
Open
Govt
CH4


The MERLIN mission aims to achieve high precision and accuracy in obtaining spatial and temporal gradients of atmospheric CH4 columns on a global scale. It seeks to enhance knowledge of both natural and anthropogenic CH4 emissions, contributing to better understanding and monitoring of greenhouse gas dynamics and their impact on the environment. More...

MicroCARB
MicroCARB
Open
Govt
CO2


The MicroCARB mission aims to globally map CO2 sources and sinks, as well as fluxes between the atmosphere, oceans, and vegetation. It plays a critical role in understanding carbon cycles and helps monitor the impact of natural and human activities on greenhouse gas dynamics. More...

OCO-2
OCO-2
Open
Govt
CO2


The mission aims to obtain high-resolution CO2 measurements, characterising sources and sinks regionally and quantifying their seasonal variability. Its application enhances understanding of surface CO2 sources and sinks, identifying regional differences between geographic areas. More...

OCO-3
OCO-3
Open
Govt
CO2


The mission aims to acquire high-resolution CO2 measurements, characterising sources and sinks regionally with seasonal variability. Its application includes objectives like OCO-2, understanding fossil fuel plumes across North America, Europe, and Asia, and studying anthropogenic emissions in megacities. More...

Sentinel-5
Sentinel-5
Open
Govt
CH4


The Sentinel-5 mission will conduct daily atmospheric measurements, monitoring global coverage for air quality, climate forcing, ozone, and UV radiation. It will also track GHG emissions like CH4, as well as their tracers and aerosols, relevant to climate forcing on a global scale. More...

Sentinel-5P
Sentinel-5P
Open
Govt
CH4


The Sentinel-5P mission conducts high-resolution atmospheric measurements daily, contributing to air quality, ozone, UV radiation, climate monitoring, and forecasting. It specifically monitors GHGs, including CH4, their tracers, and aerosols with relevance to global climate forcing. More...

UVSQ-Sat NG
UVSQ-Sat NG
Limited
NGO
CO2
CH4


UVSQ-Sat NG objectives include ensuring continuity of the Earth Radiation Budget (ERB) initiated via the UVSQ-Sat and Inspire-Sat satellites, achieving broadband ERB measurements, and conducting precise and comprehensive monitoring of atmospheric gas concentrations (CH4, CO2) on a global scale. More...



Facility Scale Plume Monitors

A wide range of public, commercial and NGO groups are operating or planning missions (often smallsats) in this category, with many of them targeted at helping the fossil fuel industry address emission reductions from their operations, particularly for CH4 extraction and transport. Many of the relevant sensors are multi-purpose hyperspectral imagers, which can track intense plumes of CO2 and CH4. Sensors assigned to this category must have a spatial resolution of 1 square km or finer, but do not require the precision, accuracy, or coverage of the Global GHG Mappers.
Airmo Constellation
Airmo Constellation
Paid
Comm
CO2
CH4


The mission aims to monitor diverse and remote locations for GHG emissions, especially CH4. By 2030, it seeks to identify all super emitters, particularly within the Oil & Gas industry, contributing to improved greenhouse gas monitoring efforts. More...

Aurora
Aurora
Paid
Comm
CO2
CH4


The Aurora mission is a precursor to GHOSt, capturing 450 spectral bands from visible to shortwave infrared. This advanced capability observes key greenhouse gases (GHGs) like CO2, CH4, N2O, and more, enhancing greenhouse gas monitoring efforts. More...

Brightskies
Brightskies
Paid
Comm
CO2
CH4


The Brightskies mission employs hyperspectral observations to track environmental impacts, water quality, and atmospheric changes. Its application involves measuring carbon dioxide and methane in the troposphere and understanding the source and sink processes affecting these greenhouse gases (GHGs), contributing to our understanding of climate dynamics and environmental changes. More...

Carbon Mapper
Carbon Mapper
Open / Paid
NGO
CO2
CH4


The mission's goal is to pinpoint, quantify, and monitor CH4 and CO2 emissions at individual facility scales, promoting global accessibility and transparency of methane and CO2 data. The application includes fast methane leak detection for facility operators and regulators, aiding in certifying methane intensity for oil and gas supply chains. More...

CO2Image
CO2Image
Open
Govt
CO2


The mission goal of CO2Image is to precisely measure trace gas emissions at a high spatial resolution, offering valuable insights into greenhouse gas dynamics and their impact on the environment. By providing accurate data, it aids in understanding and addressing climate change challenges effectively. More...

DQ-1
DQ-1
Limited
Govt
CO2


DQ-1 is the first spaceborne lidar capable of measuring CO2, with expected accuracy better than 1 ppm. The mission is a follow-on to the GF-5 series. More...

EMIT
EMIT
Open
Govt
CO2
CH4


EMIT's mission goal is to fill the crucial gap in dust source information, enabling scientists to create a comprehensive mineral map of Earth's dust-producing regions. By providing this missing data, EMIT supports better understanding and management of dust-related environmental impacts and atmospheric processes. More...

EnMAP
EnMAP
Open
Govt
CO2
CH4


The EnMAP mission aims to measure, derive, and analyse essential parameters for Earth's surface, including agriculture, forestry, soil, geology, coastal zones, and inland waters. It assesses ecosystem status and responses to environmental changes, aiding carbon emissions accounting and monitoring land surface changes like forest degradation and deforestation. More...

GEI-SAT Constellation
GEI-SAT Constellation
Open / Paid
Comm
CH4


As part of a dedicated constellation, GEI-SAT will aim to provide near-continuous coverage of any sub-polar point on the globe (during daytime hours) to identify CH4 emission sources. This high-frequency monitoring enhances our ability to understand and mitigate methane emissions impact on climate change and the environment. More...

GEI-SAT Precursor
GEI-SAT Precursor
Open / Paid
Comm
CH4


GEI-SAT's main goal is high-resolution CH4 measurements and geolocation of emitters to quantify methane emissions in Oil & Gas. As part of a dedicated constellation, it provides near-continuous sub-polar coverage during daylight. Combined with VNIR and SWIR observations, it accurately identifies CH4 emission sources globally. More...

GHGSat-C
GHGSat-C
Paid
Comm
CO2
CH4


The GHGSat-C series of satellites optimally measures CH4 from point sources and localised areas. It offers insights into industrial CH4 emissions, aiding industrial operations and policy development. In-orbit measurements of controlled CH4 releases validate instrument performance. GHGSat C-10 measures CO2 emissions, while the other satellites in the constellation measure CH4 only. More...

Aurora
GHOSt Constellation
Paid
Comm
CO2
CH4


The GHOSt satellite constellation builds on the Aurora mission, capturing data with enhanced 8-meter spatial resolution across the same spectral bands. It serves multiple sectors, like energy, mining, and defense, supporting tasks such as pipeline monitoring, methane mapping, clean-energy exploration, sustainable mining practices, and wildfire risk mitigation. More...

MethaneSAT
MethaneSAT
Open
NGO
CH4


MethaneSAT aims to detect high-emitting point sources with broader swath coverage, enabling frequent revisits for robust emission quantification. It monitors regions responsible for 80% of global oil and gas production, quantifying emissions rates and facilitating tracking changes over time. Its applications will be significant in the oil and gas and agriculture sectors. More...

PRISMA
PRISMA
Open
Govt
CO2
CH4


The PRISMA mission aims to provide a global observation capability for monitoring natural resources and atmospheric characteristics. It specifically covers Europe and the Mediterranean region. The mission's application involves monitoring the carbon cycle and quantifying GHG emissions from various sources. More...

ScepterSat
ScepterSat
Paid
Comm
CO2
CH4


ScepterSat utilises advanced hyperspectral sensors to observe emissions from point-source to regional scales, with a primary focus on various air-quality parameters, including major GHGs. Scepter has also developed, for regional station-keeping observing, ScepterHAPS, the first stratospheric balloon-borne spectrometer validated with customer data to detect CH4 below 20 kg methane per hour. More...

TANGO-Carbon
TANGO-Carbon
Open
Comm
CO2
CH4


The TANGO Carbon mission (TANGO-Carbon) monitors CH4 and CO2 emissions from industrial facilities and power plants. It complements Copernicus missions like Sentinel-5P and the CO2M High Priority Candidate Mission (HPCM), providing high-resolution, regular monitoring of major anthropogenic GHG emissions to enhance our understanding of greenhouse gas dynamics and their environmental impact. More...



Operational Sounders

Sounder instruments have been used for decades in support of operational weather forecasting. Several sounder instruments have the ability to measure CH4 (to about ~20 ppb accuracy) and/or CO2 (to about 2-5 ppm accuracy) in the upper troposphere or above. These measurements are useful for monitoring the transport of greenhouse gases into the upper troposphere and their impact on the climate, but generally provide little insight into surface sources and sinks of CO2 and CH4.
Aqua
Aqua
Open
Govt
CO2
CH4


The Aqua mission's goal is to study Earth's interconnected processes and water cycle. It measures CO2 and CHM4 in the middle troposphere with AIRS, studying the atmosphere's response to greenhouse gases. More...

JPSS
JPSS
Open
Govt
CO2


The JPSS series (also known as NOAA-20 & 21) carry the CrIS instrument, which gathers information on GHGs, primarily in the middle and upper atmosphere. More...

Metop-B
Metop-B
Open
Govt
CO2
CH4


The Metop-B mission acquires diverse land, ocean, and atmospheric measurements, supporting operational services for nowcasting, weather forecasting, and climate applications. It profiles the middle atmosphere to monitor CO2, CH4, and N2O, derived from IASI measurements, contributing crucial data for climate and greenhouse gas monitoring efforts. More...

Metop-C
Metop-C
Open
Govt
CO2
CH4


Metop-C is the third and final satellite of the first generation of Metop polar-orbiting meteorological satellites,following on from Metop-A and Metop-B. The mission acquires a wide range of land, ocean, and atmospheric measurements serving operational services for weather forecasting and climate. Metop-C provides observations of the global atmosphere, oceans and continents. Flying in low Earth orbit at an altitude of about 800 km, these polar-orbiting satellites are able to take images of our planet in unprecedented detail. It can monitor CO2, CH4, and N2O that are derived from IASI measurements. More...

Metop-Second Generation A1/A2/A3
Metop-Second Generation A1/A2/A3
Open
Govt
CO2
CH4


The goal of Metop-Second Generation missions is to acquire diverse land, ocean, and atmospheric measurements, serving operational services for nowcasting, weather forecasting, air quality monitoring, and climate applications. These missions play a crucial role in enhancing our understanding of Earth's systems and improving weather and climate predictions. More...

SciSat-1
SciSat-1
Open
Govt
CO2
CH4


SciSat-1 monitors and analyses chemical processes that impact ozone distribution in the upper troposphere and stratosphere. It measures vertical resolutions of major greenhouse gases (GHGs) identified in the Paris Agreement for effective monitoring. More...

Suomi NPP
Suomi NPP
Open
Govt
CO2


The mission aims to obtain diverse land, ocean, and atmospheric measurements to advance Earth system science and support operational weather forecasting. It covers clouds, oceans, vegetation, ice, solid Earth, and atmosphere. The application involves using the CrIS sensor to measure CO2 and CH4 concentrations in the middle troposphere. More...



Shortwave Infrared Capabilities

In addition to the above missions, there are a wide range of satellite-based instruments with shortwave infrared (SWIR) imaging capabilities that enable methane plume detection. Many of these are housed onboard multi-purpose land surface imaging missions suited to a broad range of applications for agricultural, industry, environment, and social sectors and are not optimised for GHG observations. These many missions are not documented here but we recognise several systems that have proven useful in detecting emissions with daily global coverage and the ability to detect emissions of around 5 tonnes per hour. These include the Sentinel-2, Landsat-8 and -9, and the WorldView missions. Research is also underway on the potential of geostationary satellite sensors to provide continuous monitoring capabilities of larger emissions, but these systems are not listed in this portal.

Case Studies

Satellite GHG Data Making an Impact
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Observe Daily Pulses in CO2 Emissions
CO2

NASA's Earth Observatory presents a global model of CO2 between January and March 2020, using data from MODIS and VIIRS satellite instruments. Circulation of the Earth's atmosphere spreads these CO2 emissions across the continents and oceans. The model was created using NASA's Goddard Earth Observing System (GOES), a supercomputer-powered weather model used to simulate atmospheric processes. GOES uses satellite data including that from NASA's Terra and NOAA's Suomi-NPP satellites.

The map pulses daily due primarily to the diurnal behaviour of both fires and plant life. Fires tend to flare up during daytime and die down at night - and plants absorb CO2 during the day then release it during the night.

The full CO2 visualisation can be downloaded from NASA's visualisation studio.

Read More...

Pipe Leak in the UK Detected by GHGSat
CH4

GHGSat satellites observed a methane plume over Cheltenham, UK, originating from a pipe leak near a landfill site. Researchers from the UK's National Centre for Earth Observation (NCEO) and the University of Leeds spotted the emission while using GHGSat data in support of the UK DECC (Deriving Emissions linked to Climate Change) Network.

GHGSat tasked their constellation to make five further measurements which observed methane emission rates of between 200 and 1,400 kg per hour. These observations were validated by in situ measurements and then used to inform the attributor who promptly addressed the leak. This feat marked the first time that methane emission in the UK had been detected from space and mitigated.

Read More...

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Cairo Farmlands Absorb CO2
CO2

JAXA's GOSAT mission monitored crops on farm lands surrounding Cairo, Egypt consumed CO2 by observing solar-induced chlorophyll fluorescence (SIF). SIF is an innovative measurement that serves as a proxy for plant photosynthetic activity. Crops and other plants absorb sunlight during photosynthesis, and emit some of the unused energy as a red glow, known as SIF.

Daily atmospheric CO2 changes can be monitored by combining data from the GOSAT and Sentinel-5P satellites with surface wind data and emission inventories. GOSAT observes partial column densities of tropospheric carbon dioxide (XCO2) over cities and provides CO2 enhancement between the lower and upper atmosphere.

The image shows that in the summer growing season, low CO2 levels were detected over Cairo, correlated with high SIF.

Read More...

Global Methane Monitoring with Kayrros
CH4

European company Kayrros has developed a global methane monitoring tool that leverages data from the Sentinel-5P and EMIT missions, with further data available from Sentinel-2 and -3, GOES-R, EnMAP, and PRISMA. The tool features a time series of large methane emissions with asset and source classification.

ESA's Sentinel-5P observations are supplemented by missions like Sentinel-2 and -3 with higher resolution and narrower swaths, using the 'tip and cue' measurement approach, which uses a facility scale plume monitor to hone in on a GHG source as broadly identified by a wide area mapper.

Kayrros studies indicate that there are around 100 large methane leaks at any time around the world, and approximately half of them are attributable to the oil, gas and mining sectors.

Read More...

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Explore Data with the US GHG Center
CO2
CH4

The U.S. GHG Centre Explorer showcases a global interactive map of GHG emissions and fluxes. The platform offers public access to GHG datasets, information, and analysis tools.

Data available through the explorer include air-sea CO2 flux, gridded anthropogenic CH4 emissions, GOSAT CH4 emissions, wetland CH4, MiCASA Land Carbon Flux, OCO-2 data, fossil fuel CO2, world population density, and inverse CH4.

Read More...