Sensor · Spaceborne

Infrared Atmospheric Sounding Interferometer - New Generation

Missions → Metop-SG-A1 (Commissioning)

Passive infrared sounder on Metop-SG A satellites providing radiance spectra for atmospheric temperature, humidity, clouds, greenhouse gases, aerosols, and trace gases.

Sensor

Infrared Atmospheric Sounding Interferometer - New Generation (IASI-NG) is a passive optical cross-nadir infrared hyperspectral sounder for the Metop-SG A series, succeeding the first-generation IASI instruments on Metop. ^[1] It records 16,921 spectral samples across 645-2760 cm^-1, about 3620-15500 nm, with four 12 km instantaneous fields of view inside each 100 x 100 km field and an average 24 km sampling distance. ^[1] The swath is about 2000 km, giving broad cross-track coverage for atmospheric temperature and humidity sounding, cloud parameters, greenhouse gases, aerosols and trace gases. ^[1] IASI-NG has demonstrated atmospheric sounding on Metop-SG A1 through first returned data; first IASI-NG data returned in October 2025, with calibration and validation under way ahead of operational distribution to users in 2026. ^[2] CNES has overall technical responsibility for IASI-NG within the Metop-SG atmospheric-sounding payload set. ^[3]

Operator pricing

Pricing not publicly listed by operator

Supply chain position

carried by Metop-SG-A1

Methods this sensor implements

Demonstrated

None on record.

Capable, undemonstrated

Hyperspectral infrared nadir soundingpending review
cnes-iasi-ng-first-light: first complete spectrum 2025-09-30 on Metop-SG-A1; operational distribution planned 2026, not confirmed.

Topics this relates to

Atmospheric profiling Hyperspectral infrared nadir sounding(capable-pending-review)well suited

Air quality Hyperspectral infrared nadir sounding(capable-pending-review)adequate

Cloud properties Hyperspectral infrared nadir sounding(capable-pending-review)adequate

Weather nowcasting Hyperspectral infrared nadir sounding(capable-pending-review)adequate

CO2 Hyperspectral infrared nadir sounding(capable-pending-review)marginal

Earth radiation budget Hyperspectral infrared nadir sounding(capable-pending-review)marginal

Greenhouse gas inventory Hyperspectral infrared nadir sounding(capable-pending-review)marginal

Methane (CH4)Hyperspectral infrared nadir sounding(capable-pending-review)marginal

Sea surface temperature Hyperspectral infrared nadir sounding(capable-pending-review)marginal

Stratospheric ozone Hyperspectral infrared nadir sounding(capable-pending-review)marginal

Sources

[1]WMO OSCAR instrument record: IASI-NGagency doc2026-06-16
[2]IASI-NG instrument on Metop-SGA1 satellite sends back first data, EUMETSATagency doc2026-06-16
[3]IASI-NG project page, CNESagency doc2026-06-16

Cite https://eo-atlas.org/products/sensor/iasi-ng Markdown twin → Field definitions → Suggest a correction →

How to cite this page

Plain text

Infrared Atmospheric Sounding Interferometer - New Generation. EO-Atlas, SpectraWorks B.V. https://eo-atlas.org/products/sensor/iasi-ng (CC BY 4.0)

BibTeX

@misc{eoatlas:products:sensor:iasi-ng,
  title = {Infrared Atmospheric Sounding Interferometer - New Generation},
  author = {{EO-Atlas}},
  publisher = {SpectraWorks B.V.},
  note = {CC BY 4.0},
  url = {https://eo-atlas.org/products/sensor/iasi-ng}
}