# AWiFS
*sensor . products*

Wide-swath passive optical multispectral imager flown on Resourcesat missions for land and vegetation observation.

## Specifications
- **product status**: operational
- **deployment context**: orbital
- **manufacturer**: isro
- **sensor**: {"instrument_family":"passive-optical","measurement_principle":"passive","spectral_range_nm":{"min":520,"max":1700},"spectral_band_count":4,"gsd_m":{"native":56},"swath_km":740,"bit_depth":12,"bands":[{"name":"Green","centre_nm":555,"fwhm_nm":70},{"name":"Red","centre_nm":650,"fwhm_nm":60},{"name":"NIR","centre_nm":815,"fwhm_nm":90},{"name":"SWIR","centre_nm":1625,"fwhm_nm":150}]}
- **entity type**: sensor
- **last verified date**: 2026-06-15
- **verified by**: agency-doc
- **claim status**: agency-sourced
- **provider**: isro
- **attributes**: {"kind":"sensor","product_status":"operational","deployment_context":"orbital","manufacturer":"isro","description":"Wide-swath passive optical multispectral imager flown on Resourcesat missions for land and vegetation observation.","sensor":"{\"instrument_family\":\"passive-optical\",\"measurement_principle\":\"passive\",\"spectral_range_nm\":{\"min\":520,\"max\":1700},\"spectral_band_count\":4,\"gsd_m\":{\"native\":56},\"swath_km\":740,\"bit_depth\":12,\"bands\":[{\"name\":\"Green\",\"centre_nm\":555,\"fwhm_nm\":70},{\"name\":\"Red\",\"centre_nm\":650,\"fwhm_nm\":60},{\"name\":\"NIR\",\"centre_nm\":815,\"fwhm_nm\":90},{\"name\":\"SWIR\",\"centre_nm\":1625,\"fwhm_nm\":150}]}"}
- **relevance**: in-scope

## Editorial
AWiFS (Advanced Wide Field Sensor) is a four-band passive optical multispectral imager developed by ISRO for the Resourcesat series of land observation satellites.[^isro-resourcesat-2][^wmo-awifs] It provides wide-swath coverage suited to regional and national-scale land monitoring.

The instrument records Green (555 nm), Red (650 nm), Near-Infrared (815 nm), and Shortwave Infrared (1625 nm) bands at 56 m spatial resolution with a 740 km combined swath from two camera modules, at 12-bit radiometric depth.[^wmo-awifs][^isro-resourcesat-2] The 12-bit quantization on Resourcesat-2 represents an upgrade from the 10-bit depth of the AWiFS flown on the predecessor Resourcesat-1 mission.[^isro-resourcesat-2][^eoportal-resourcesat-2] WMO OSCAR and ISRO record the combined swath as 740 km; a secondary reference cites 730 km.[^wmo-awifs][^isro-resourcesat-2]

AWiFS flies on Resourcesat-2 and Resourcesat-2A alongside the finer-resolution LISS-III and LISS-IV imagers.[^isro-resourcesat-2] Its wide swath and four-band spectral coverage, including the SWIR channel, support vegetation index mapping, seasonal land cover change detection, and burned area mapping at regional to continental scales.[^wmo-awifs][^eoportal-resourcesat-2] USGS has published a system characterization report for the Resourcesat-2A AWiFS instrument.[^usgs-awifs]

## Compositional position
- resourcesat-2 (missions) --[mission_payloads]--> AWiFS
- resourcesat-2a (missions) --[mission_payloads]--> AWiFS

## Sources
- [wmo-awifs] | AWiFS - WMO OSCAR instrument record | https://space.oscar.wmo.int/instruments/view/awifs | tier=agency-doc | accessed=2026-06-15
- [isro-resourcesat-2] | RESOURCESAT-2 - ISRO | https://www.isro.gov.in/RESOURCESAT_2.html | tier=agency-doc | accessed=2026-06-15
- [eoportal-resourcesat-2] | Resourcesat-2 mission - eoPortal | https://eoportal.org/web/eoportal/satellite-missions/r/resourcesat-2 | tier=community | accessed=2026-06-15
- [usgs-awifs] | System characterization report on Resourcesat-2A AWiFS - USGS | https://www.usgs.gov/publications/system-characterization-report-resourcesat-2a-advanced-wide-field-sensor | tier=agency-doc | accessed=2026-06-15

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