EO·Atlas
AWiFS
Wide-swath passive optical multispectral imager flown on Resourcesat missions for land and vegetation observation.
AWiFS (Advanced Wide Field Sensor) is a four-band passive optical multispectral imager developed by ISRO for the Resourcesat series of land observation satellites.[1][2] 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.[2][1] 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.[1][3] WMO OSCAR and ISRO record the combined swath as 740 km; a secondary reference cites 730 km.[2][1]
AWiFS flies on Resourcesat-2 and Resourcesat-2A alongside the finer-resolution LISS-III and LISS-IV imagers.[1] 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.[2][3] USGS has published a system characterization report for the Resourcesat-2A AWiFS instrument.[4]
Compositional position
- Vegetation index mappingvia Resourcesat-2
AWiFS has VIS/NIR/SWIR bands and WMO lists NDVI and vegetation variables among primary objectives.
- Optical time-series change detection
AWiFS wide-swath repeat optical imaging supports change-detection workflows.
- [1]AWiFS - WMO OSCAR instrument recordagency doc2026-06-15
- [2]RESOURCESAT-2 - ISROagency doc2026-06-15
- [3]Resourcesat-2 mission - eoPortalcommunity2026-06-15
- [4]System characterization report on Resourcesat-2A AWiFS - USGSagency doc2026-06-15