# Carbon Mapper Methane Plume Detections (L4)
*data products*

## Specifications
- **level**: L4
- **distributor**: carbon-mapper
- **access endpoint**: https://carbonmapper.org/data
- **access model**: open
- **licence**: Non-commercial use; register at data.carbonmapper.org
- **cost model summary**: Free for non-commercial use via data portal and REST/STAC APIs; commercial use requires direct agreement
- **primary data portal url**: https://carbonmapper.org/data
- **deployment context**: orbital
- **entity type**: data_product
- **last verified date**: 2026-05-31
- **verified by**: operator
- **claim status**: unclaimed
- **provider**: carbon-mapper
- **attributes**: {"level":"L4","distributor":"carbon-mapper","access_endpoint":"https://carbonmapper.org/data","access_model":"open","licence":"Non-commercial use; register at data.carbonmapper.org","cost_model_summary":"Free for non-commercial use via data portal and REST/STAC APIs; commercial use requires direct agreement","primary_data_portal_url":"https://carbonmapper.org/data","deployment_context":"orbital"}

## Editorial
Carbon Mapper Methane Plume Detections is a Level-4 point-source methane and CO2 super-emitter product. It uses a column-wise matched filter algorithm to retrieve CH4 and CO2 plumes from imaging spectrometer data. Source instruments include Tanager-1 (launched 2024-08-16, commissioned January 2025), NASA EMIT on the International Space Station, and AVIRIS airborne data.[^amt-tanager1-paper]

At Tanager-1 operating altitude of 406 km, ground sample distance is approximately 30 m and swath width is approximately 19 km at nadir, extendable to approximately 26 km at 30-degree off-nadir pointing. Spectral coverage is 380-2500 nm at 5 nm sampling and 5.5 nm FWHM.[^amt-tanager1-paper] Methane detection limit ranges from 64 to 126 kg/hour under reference conditions (25% albedo, 45-degree solar zenith angle, 3 m/s wind).[^amt-tanager1-paper]

The collection mode is tasked: coverage is not continuous and targets are scheduled. This limits applicability to systematic global monitoring without prior tasking.[^carbonmapper-data-portal]

Products are accessible at data.carbonmapper.org and via STAC API at https://api.carbonmapper.org/api/v1/stac/. Non-commercial access is free upon registration. Commercial use requires a direct agreement with Carbon Mapper.[^carbonmapper-data-portal][^carbonmapper-stac]

## Compositional position
- methane (topics) --[topic_capabilities]--> Carbon Mapper Methane Plume Detections (L4)

## Sources
- [amt-tanager1-paper] | The Carbon Mapper emissions monitoring system, AMT 2025 | https://amt.copernicus.org/articles/18/6933/2025/ | tier=peer-reviewed | accessed=2026-05-31
- [carbonmapper-data-portal] | Carbon Mapper data portal | https://carbonmapper.org/data | tier=operator-datasheet | accessed=2026-05-31
- [carbonmapper-stac] | Carbon Mapper STAC API endpoint | https://api.carbonmapper.org/api/v1/stac/ | tier=operator-engineering | accessed=2026-05-31

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Source: https://eo-atlas.org/data_products/carbon-mapper-methane-plumes
Maintainer: SpectraWorks B.V. (CC-BY 4.0)