# SWOT Microwave Radiometer
*sensor . products*

Passive microwave radiometer on SWOT used to measure wet-tropospheric path delay for altimetry correction.

## Specifications
- **manufacturer**: nasa-jpl
- **deployment context**: orbital
- **sensor**: {"instrument_family":"radiometer","measurement_principle":"passive","frequency_bands_ghz":[18.7,23.8,34],"scan_type":"static"}
- **entity type**: sensor
- **last verified date**: 2026-06-16
- **verified by**: agency-doc
- **claim status**: agency-sourced
- **provider**: nasa-jpl
- **attributes**: {"kind":"sensor","manufacturer":"nasa-jpl","deployment_context":"orbital","description":"Passive microwave radiometer on SWOT used to measure wet-tropospheric path delay for altimetry correction.","sensor":"{\"instrument_family\":\"radiometer\",\"measurement_principle\":\"passive\",\"frequency_bands_ghz\":[18.7,23.8,34],\"scan_type\":\"static\"}"}
- **relevance**: in-scope

## Editorial
The SWOT Microwave Radiometer is a Jason-class advanced microwave radiometer on SWOT that measures 18.7, 23.8, and 34 GHz brightness temperatures.[^podaac-swot-rad-gdr] Its radiometer data support estimates of wet-troposphere content, atmospheric attenuation to backscatter, cloud liquid water, water-vapour content, and wind speed coincident with nadir-altimeter range measurements.[^podaac-swot-rad-gdr] The measurements are collected along two tracks approximately 30 km left and right of satellite nadir.[^podaac-swot-rad-gdr] The instrument performs passive microwave radiometry, demonstrated on SWOT.[^podaac-swot-rad-gdr]

## Compositional position
- swot (missions) --[mission_payloads]--> SWOT Microwave Radiometer

## Sources
- [podaac-swot-rad-gdr] | SWOT Level 2 Radiometer Brightness Temperatures and Troposphere GDR | https://podaac.jpl.nasa.gov/dataset/SWOT_L2_RAD_GDR_2.0 | tier=agency-doc | accessed=2026-06-16
- [nasa-swot-flight-systems] | SWOT flight systems, NASA/JPL | https://swot.jpl.nasa.gov/mission/flight-systems/ | tier=agency-doc | accessed=2026-06-16
- [wmo-swot] | WMO OSCAR satellite record: SWOT | https://space.oscar.wmo.int/satellites/view/swot | tier=agency-doc | accessed=2026-06-16

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