# SLSTR (Sea and Land Surface Temperature Radiometer)
*sensor . products*

Dual-view scanning temperature radiometer on Sentinel-3, providing sea and land surface temperature measurements and fire radiative power products. The instrument combines VIS/SWIR channels at 0.5 km with thermal and fire channels at 1 km.

## Specifications
- **product status**: operational
- **deployment context**: orbital
- **manufacturer**: selex-galileo
- **sensor**: {"measurement_principle":"passive","channels":[{"spectral_range_nm":{"min":555,"max":2250},"spectral_band_count":6,"name":"VIS-SWIR","gsd_m":{"native":500}},{"spectral_range_nm":{"min":3740,"max":12000},"spectral_band_count":3,"name":"MWIR-TIR","gsd_m":{"native":1000}},{"spectral_range_nm":{"min":3740,"max":10850},"spectral_band_count":2,"name":"Fire","gsd_m":{"native":1000}}],"spectral_range_nm":{"min":555,"max":12000},"instrument_family":"passive-optical","gsd_m":{"native":1000},"swath_km":1470,"spectral_band_count":11}
- **design heritage**: {"notes":"SLSTR continues the Along Track Scanning Radiometer series with wider swath and added channels for cloud, aerosol and fire monitoring.","lineage":["ATSR","AATSR"]}
- **entity type**: sensor
- **last verified date**: 2026-06-14
- **verified by**: agency-doc
- **claim status**: agency-sourced
- **provider**: selex-galileo
- **attributes**: {"kind":"sensor","product_status":"operational","deployment_context":"orbital","manufacturer":"selex-galileo","description":"Dual-view scanning temperature radiometer on Sentinel-3, providing sea and land surface temperature measurements and fire radiative power products. The instrument combines VIS/SWIR channels at 0.5 km with thermal and fire channels at 1 km.","sensor":"{\"measurement_principle\":\"passive\",\"channels\":[{\"spectral_range_nm\":{\"min\":555,\"max\":2250},\"spectral_band_count\":6,\"name\":\"VIS-SWIR\",\"gsd_m\":{\"native\":500}},{\"spectral_range_nm\":{\"min\":3740,\"max\":12000},\"spectral_band_count\":3,\"name\":\"MWIR-TIR\",\"gsd_m\":{\"native\":1000}},{\"spectral_range_nm\":{\"min\":3740,\"max\":10850},\"spectral_band_count\":2,\"name\":\"Fire\",\"gsd_m\":{\"native\":1000}}],\"spectral_range_nm\":{\"min\":555,\"max\":12000},\"instrument_family\":\"passive-optical\",\"gsd_m\":{\"native\":1000},\"swath_km\":1470,\"spectral_band_count\":11}","design_heritage":"{\"notes\":\"SLSTR continues the Along Track Scanning Radiometer series with wider swath and added channels for cloud, aerosol and fire monitoring.\",\"lineage\":[\"ATSR\",\"AATSR\"]}"}
- **technology**: optical-spectral-sensing
- **relevance**: in-scope

## Editorial
SLSTR is the Sea and Land Surface Temperature Radiometer carried by the Sentinel-3 satellite series for sea surface temperature, land surface temperature, and fire radiative power observations [^sentiwiki-slstr][^nasa-laads-s3a-slstr]. It is a passive dual-view scanning radiometer with visible, shortwave infrared, midwave infrared, and thermal infrared channels spanning 0.555 to 12 um [^sentiwiki-slstr]. The instrument uses 0.5 km sampling for the VIS-SWIR channels and 1 km sampling for the IR and fire channels [^sentiwiki-slstr][^nasa-laads-s3a-slstr]. Its channel set is recorded as nine main spectral channels plus two dedicated fire channels, preserving the fire bands separately for thermal-anomaly workflows [^sentiwiki-slstr][^nasa-laads-s3a-slstr]. Operational coverage comparisons should account for both published swath values: 1470 km for the nadir-view swath and 1420 km for the S3A L1B product overview [^sentiwiki-slstr][^nasa-laads-s3a-slstr]. Leonardo, through Selex-Galileo heritage, held project responsibility and final integration responsibility for SLSTR on Sentinel-3A and Sentinel-3B [^leonardo-slstr]. SLSTR continues the ATSR and AATSR line with a wider swath and added cloud, aerosol, and fire monitoring channels [^sentiwiki-slstr].

## Compositional position
- sentinel-3a (missions) --[mission_payloads]--> SLSTR (Sea and Land Surface Temperature Radiometer)
- sentinel-3b (missions) --[mission_payloads]--> SLSTR (Sea and Land Surface Temperature Radiometer)

## Sources
- [sentiwiki-slstr] | S3 SLSTR Instrument, Copernicus SentiWiki | https://sentiwiki.copernicus.eu/web/s3-slstr-instrument | tier=agency-doc | accessed=2026-06-14
- [nasa-laads-s3a-slstr] | S3A SLSTR L1B product, NASA LAADS DAAC | https://ladsweb.modaps.eosdis.nasa.gov/missions-and-measurements/products/S3A_SL_1_RBT | tier=agency-doc | accessed=2026-06-14
- [leonardo-slstr] | The SLSTR sensor on the Sentinel-3 satellite, Leonardo | https://www.leonardo.com/en/news-and-stories-detail/-/detail/the-slstr-sensor-on-the-sentinel-3-satellite | tier=operator-engineering | accessed=2026-06-14
- [eumetsat-slstr-frp] | Copernicus Sentinel-3 SLSTR Near Real Time Fire Radiative Power, EUMETSAT | https://user.eumetsat.int/resources/user-guides/copernicus-sentinel-3-slstr-near-real-time-fire-radiative-power | tier=agency-doc | accessed=2026-06-14

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