# GHGSat WAF-P imaging spectrometer
*sensor . products*

Wide-angle Fabry-Perot SWIR imaging spectrometer used by GHGSat methane satellites for facility-scale greenhouse-gas plume imaging.

## Specifications
- **manufacturer**: ghgsat
- **deployment context**: orbital
- **product status**: operational
- **sensor**: {"instrument_family":"passive-optical","measurement_principle":"passive","spectral_range_nm":{"min":1630,"max":1675},"sampling_nm":0.1,"gsd_m":{"native":25},"swath_km":12,"spec_disclosure":"estimated"}
- **entity type**: sensor
- **last verified date**: 2026-06-16
- **verified by**: agency-doc
- **claim status**: unclaimed
- **provider**: ghgsat
- **attributes**: {"kind":"sensor","manufacturer":"ghgsat","description":"Wide-angle Fabry-Perot SWIR imaging spectrometer used by GHGSat methane satellites for facility-scale greenhouse-gas plume imaging.","deployment_context":"orbital","product_status":"operational","sensor":"{\"instrument_family\":\"passive-optical\",\"measurement_principle\":\"passive\",\"spectral_range_nm\":{\"min\":1630,\"max\":1675},\"sampling_nm\":0.1,\"gsd_m\":{\"native\":25},\"swath_km\":12,\"spec_disclosure\":\"estimated\"}"}
- **relevance**: in-scope

## Editorial
The GHGSat WAF-P imaging spectrometer is a wide-angle fixed-cavity Fabry-Perot shortwave-infrared sensor family used for targeted greenhouse-gas plume imaging.[^ghgsat-d-amt-2021] It spectrally decomposes solar backscattered SWIR radiation for retrieval of absorption features associated with methane, carbon dioxide, and water vapour.[^ghgsat-d-amt-2021] The disclosed GHGSat-D heritage instrument operated over 1630-1675 nm with about 0.1 nm spectral resolution and targeted 12 x 12 km scenes.[^ghgsat-d-amt-2021] Later WAF-P constellation use is carried at 25 m native ground sampling and 12 km swath; the GHGSat-D demonstrator generation reported 50 x 50 m effective spatial resolution over 12 x 12 km targeted scenes.[^ghgsat-d-amt-2021] The sensor is relevant where facility-scale methane plume imaging and industrial greenhouse-gas attribution depend on targeted acquisitions rather than continuous wide-area mapping.[^ghgsat-d-amt-2021][^wmo-ghgsat]

## Compositional position
- ghgsat (missions) --[mission_payloads]--> GHGSat WAF-P imaging spectrometer

## Sources
- [ghgsat-d-amt-2021] | The GHGSat-D imaging spectrometer, Atmospheric Measurement Techniques | https://amt.copernicus.org/articles/14/2127/2021/ | tier=peer-reviewed | accessed=2026-06-16
- [esa-ghgsat-c1-qa] | ESA Earth Online: GHGSAT-C1/WAF-P Quality Assessment Summary | https://earth.esa.int/eogateway/documents/20142/37627/Technical%20Note%20on%20Quality%20Assessment%20for%20GHGSat-C1.pdf | tier=agency-doc | accessed=2026-06-16
- [wmo-ghgsat] | WMO OSCAR satellite record: GHGSat | https://space.oscar.wmo.int/satellites/view/ghgsat | tier=agency-doc | accessed=2026-06-16

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Source: https://eo-atlas.org/products/sensor/ghgsat-waf-p
Maintainer: SpectraWorks B.V. (CC-BY 4.0)