# CBERS-4A Wide Field Imager
*sensor . products*

Wide Field Imager camera flown on CBERS-4A.

## Specifications
- **product status**: operational
- **deployment context**: orbital
- **manufacturer**: inpe
- **sensor**: {"instrument_family":"passive-optical","measurement_principle":"passive","spec_disclosure":"estimated","spectral_range_nm":{"min":450,"max":890},"spectral_band_count":4,"gsd_m":{"native":55},"swath_km":684}
- **entity type**: sensor
- **last verified date**: 2026-06-16
- **verified by**: agency-doc
- **claim status**: agency-sourced
- **provider**: inpe
- **attributes**: {"kind":"sensor","product_status":"operational","deployment_context":"orbital","manufacturer":"inpe","description":"Wide Field Imager camera flown on CBERS-4A.","sensor":"{\"instrument_family\":\"passive-optical\",\"measurement_principle\":\"passive\",\"spec_disclosure\":\"estimated\",\"spectral_range_nm\":{\"min\":450,\"max\":890},\"spectral_band_count\":4,\"gsd_m\":{\"native\":55},\"swath_km\":684}"}
- **relevance**: in-scope

## Editorial
CBERS-4A Wide Field Imager is a passive optical wide-field camera flown on CBERS-4A, distinct from the CBERS-4 WFI-2 payload.[^inpe-cbers-04a-cameras] It records four blue, green, red, and near-infrared bands spanning 450 to 890 nm at 55 m native ground sampling distance across a 684 km swath.[^inpe-cbers-04a-cameras] CBERS-4A uses the same WFI camera as CBERS-3/4, with the 55 m nadir resolution resulting from CBERS-4A's lower orbit altitude.[^inpe-cbers-04a-cameras]

CBERS-4A WFI imagery has 5-day temporal resolution and uses the same four blue/green/red/NIR bands for the CBERS-4A WFI data stream.[^bdc-input-data] The camera has no side-looking mirror and an approximately 51 Mbit/s gross data rate.[^inpe-cbers-04a-cameras] Use of WFI on CBERS-4A is demonstrated for vegetation index mapping and optical time-series change detection.[^inpe-cbers-04a-cameras][^ceos-cbers-4a]

## Compositional position
- cbers-4a (missions) --[mission_payloads]--> CBERS-4A Wide Field Imager

## Sources
- [inpe-cbers-04a-cameras] | INPE CBERS-04A imaging cameras | https://www.gov.br/inpe/pt-br/programas/cbers/sobre-o-cbers-1/cbers-04a/cameras-imageadoras | tier=agency-doc | accessed=2026-06-16
- [bdc-input-data] | Brazil Data Cube input data specifications | https://brazil-data-cube.github.io/specifications/input-data.html | tier=agency-doc | accessed=2026-06-16
- [ceos-cbers-4a] | CEOS MIM mission summary: CBERS-4A | https://database.eohandbook.com/database/missionsummary.aspx?missionID=775 | tier=community | accessed=2026-06-16

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Source: https://eo-atlas.org/products/sensor/wfi-cbers-4a
Maintainer: SpectraWorks B.V. (CC-BY 4.0)