# INSAT-3DR Imager
*sensor . products*

Six-channel geostationary meteorological imager on INSAT-3DR, covering visible, SWIR, MWIR, water-vapour, and split-window TIR bands.

## Specifications
- **product status**: operational
- **deployment context**: orbital
- **manufacturer**: isro
- **sensor**: {"instrument_family":"passive-optical","measurement_principle":"passive","spectral_range_nm":{"min":520,"max":12500},"spectral_band_count":6,"gsd_m":{"native":1000},"bit_depth":10,"channels":[{"name":"VIS/SWIR","spectral_range_nm":{"min":520,"max":1700},"spectral_band_count":2,"gsd_m":{"native":1000}},{"name":"MWIR/TIR","spectral_range_nm":{"min":3800,"max":12500},"spectral_band_count":3,"gsd_m":{"native":4000}},{"name":"Water vapour","spectral_range_nm":{"min":6500,"max":7000},"spectral_band_count":1,"gsd_m":{"native":8000}}]}
- **entity type**: sensor
- **last verified date**: 2026-06-16
- **verified by**: agency-doc
- **claim status**: agency-sourced
- **provider**: isro
- **attributes**: {"kind":"sensor","product_status":"operational","deployment_context":"orbital","manufacturer":"isro","description":"Six-channel geostationary meteorological imager on INSAT-3DR, covering visible, SWIR, MWIR, water-vapour, and split-window TIR bands.","sensor":"{\"instrument_family\":\"passive-optical\",\"measurement_principle\":\"passive\",\"spectral_range_nm\":{\"min\":520,\"max\":12500},\"spectral_band_count\":6,\"gsd_m\":{\"native\":1000},\"bit_depth\":10,\"channels\":[{\"name\":\"VIS/SWIR\",\"spectral_range_nm\":{\"min\":520,\"max\":1700},\"spectral_band_count\":2,\"gsd_m\":{\"native\":1000}},{\"name\":\"MWIR/TIR\",\"spectral_range_nm\":{\"min\":3800,\"max\":12500},\"spectral_band_count\":3,\"gsd_m\":{\"native\":4000}},{\"name\":\"Water vapour\",\"spectral_range_nm\":{\"min\":6500,\"max\":7000},\"spectral_band_count\":1,\"gsd_m\":{\"native\":8000}}]}"}
- **relevance**: in-scope

## Editorial
INSAT-3DR Imager is the mission's six-channel geostationary meteorological imager, separate from the 19-channel INSAT-3DR Sounder [^mosdac-insat-3dr-payloads][^isro-insat-3dr]. It provides visible, shortwave-infrared, mid-wave infrared, water-vapour, and split-window thermal-infrared imaging for cloud, surface, and radiance products over the Indian Ocean region [^mosdac-insat-3dr-payloads][^wmo-insat-imager]. The band set is VIS 0.52-0.72 um, SWIR 1.55-1.70 um, MWIR 3.80-4.00 um, water vapour 6.50-7.00 um, TIR-1 10.2-11.2 um, and TIR-2 11.5-12.5 um [^mosdac-insat-3dr-payloads]. Ground sampling is 1 km for VIS/SWIR, 4 km for MWIR and thermal-window bands, and 8 km for the water-vapour band; the payload uses 10-bit imaging [^mosdac-insat-3dr-payloads]. Demonstrated uses include atmospheric motion vectors from image sequences, sea-surface-temperature retrieval from split-window infrared channels, and broadband radiometry products such as outgoing longwave radiation [^mosdac-insat-3dr-payloads]. The imager is best matched to repeated full-disc meteorological imaging and derived cloud, wind, radiation, and surface-temperature products, not vertical atmospheric profile retrieval [^mosdac-insat-3dr-payloads][^wmo-insat-imager].

## Compositional position
- insat-3dr (missions) --[mission_payloads]--> INSAT-3DR Imager

## Sources
- [mosdac-insat-3dr-payloads] | MOSDAC INSAT-3DR payloads | https://www.mosdac.gov.in/insat-3dr-payloads | tier=agency-doc | accessed=2026-06-16
- [wmo-insat-imager] | WMO OSCAR instrument record: INSAT imager | https://space.oscar.wmo.int/instruments/view/imager_insat | tier=agency-doc | accessed=2026-06-16
- [isro-insat-3dr] | ISRO INSAT-3DR mission page | https://www.isro.gov.in/INSAT_3DR.html | tier=agency-doc | accessed=2026-06-16

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Source: https://eo-atlas.org/products/sensor/insat-3dr-imager
Maintainer: SpectraWorks B.V. (CC-BY 4.0)