# FY-4A Advanced Geostationary Radiation Imager
*sensor . products*

FY-4A 14-channel VIS/NIR/SWIR/MWIR/TIR geostationary radiation imager for 15-minute full-disc and minute-level regional meteorological imaging.

## Specifications
- **product status**: operational
- **deployment context**: orbital
- **manufacturer**: cma
- **sensor**: {"instrument_family":"passive-optical","measurement_principle":"passive","spectral_range_nm":{"min":450,"max":12500},"spectral_band_count":14,"gsd_m":{"native":500},"channels":[{"name":"VIS/NIR/SWIR","spectral_range_nm":{"min":450,"max":2350},"spectral_band_count":6,"gsd_m":{"native":500}},{"name":"MWIR/TIR","spectral_range_nm":{"min":3500,"max":12500},"spectral_band_count":8,"gsd_m":{"native":4000}}]}
- **entity type**: sensor
- **last verified date**: 2026-06-16
- **verified by**: agency-doc
- **claim status**: agency-sourced
- **provider**: cma
- **attributes**: {"kind":"sensor","product_status":"operational","deployment_context":"orbital","manufacturer":"cma","description":"FY-4A 14-channel VIS/NIR/SWIR/MWIR/TIR geostationary radiation imager for 15-minute full-disc and minute-level regional meteorological imaging.","sensor":"{\"instrument_family\":\"passive-optical\",\"measurement_principle\":\"passive\",\"spectral_range_nm\":{\"min\":450,\"max\":12500},\"spectral_band_count\":14,\"gsd_m\":{\"native\":500},\"channels\":[{\"name\":\"VIS/NIR/SWIR\",\"spectral_range_nm\":{\"min\":450,\"max\":2350},\"spectral_band_count\":6,\"gsd_m\":{\"native\":500}},{\"name\":\"MWIR/TIR\",\"spectral_range_nm\":{\"min\":3500,\"max\":12500},\"spectral_band_count\":8,\"gsd_m\":{\"native\":4000}}]}"}
- **technology**: optical-spectral-sensing
- **relevance**: in-scope

## Editorial
The Advanced Geostationary Radiation Imager (AGRI) is the primary imaging payload aboard the FY-4A (Fengyun-4A) geostationary satellite, positioned at 104.7 deg E.[^nsmc-fy4a-instruments]

AGRI carries 14 spectral channels spanning 450 nm to 12.5 um.[^wmo-agri] Six channels cover the VIS/NIR/SWIR range (450-2350 nm) at ground sampling distances of 0.5 km (channel 2 at 0.65 um) or 1-2 km depending on channel.[^wmo-agri] Eight channels cover MWIR and TIR (3.5-12.5 um) at 4 km GSD.[^wmo-agri] Channel 7 at 3.75 um operates in a dual-resolution mode with 2 km and 4 km IFOV as confirmed design variants.[^wmo-agri][^nsmc-fy4a-instruments]

The instrument delivers full-disk imagery every 15 minutes and regional sector coverage at 1-minute cadence over a 1000 km x 1000 km window.[^nsmc-fy4a-instruments] Measurement objectives include cloud cover, optical depth, top height and temperature; integrated water vapour; horizontal wind vectors via atmospheric motion vectors; sea surface temperature; precipitation estimation; and fire detection.[^wmo-agri] Instrument mass is 306 kg.[^eoportal-fy4] FY-4A launched on 2016-12-11 and AGRI entered operational service in 2017.[^nsmc-fy4a-instruments]

## Compositional position
- fy-4a (missions) --[mission_payloads]--> FY-4A Advanced Geostationary Radiation Imager

## Sources
- [wmo-agri] | WMO OSCAR instrument record: Advanced Geostationary Radiation Imager | https://space.oscar.wmo.int/instruments/view/agri | tier=agency-doc | accessed=2026-06-16
- [nsmc-fy4a-instruments] | NSMC FY-4A instruments page | https://www.nsmc.org.cn/nsmc/en/theme/FY4A_instrument.html | tier=agency-doc | accessed=2026-06-16
- [eoportal-fy4] | FY-4 (FengYun-4) mission overview, eoPortal Directory | https://www.eoportal.org/satellite-missions/fy-4 | tier=community | accessed=2026-06-16

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