# MTVZA-GY Imaging/Sounding Microwave Radiometer
*sensor . products*

Improved imaging/sounding microwave radiometer on Meteor-M N2-4 with passive microwave channels from 10.6 GHz to water-vapour bands near 191 GHz.

## Specifications
- **product status**: operational
- **deployment context**: orbital
- **manufacturer**: npo-vniiem
- **sensor**: {"instrument_family":"radiometer","measurement_principle":"passive","frequency_bands_ghz":[10.6,18.7,23.8,31.5,36.7,42,48,52.8,57.713,91.655,175.56,191.06],"polarisation_modes":["H","V"],"scan_type":"conical"}
- **entity type**: sensor
- **last verified date**: 2026-06-16
- **verified by**: agency-doc
- **claim status**: agency-sourced
- **provider**: npo-vniiem
- **attributes**: {"kind":"sensor","product_status":"operational","deployment_context":"orbital","manufacturer":"npo-vniiem","description":"Improved imaging/sounding microwave radiometer on Meteor-M N2-4 with passive microwave channels from 10.6 GHz to water-vapour bands near 191 GHz.","sensor":"{\"instrument_family\":\"radiometer\",\"measurement_principle\":\"passive\",\"frequency_bands_ghz\":[10.6,18.7,23.8,31.5,36.7,42,48,52.8,57.713,91.655,175.56,191.06],\"polarisation_modes\":[\"H\",\"V\"],\"scan_type\":\"conical\"}"}

## Editorial
MTVZA-GY is a conical-scan passive microwave radiometer carried on Meteor-M N2-4, providing 29 channels across 21 frequency groups spanning 10.6 GHz to 191.06 GHz.[^wmo-oscar-mtvza-gy] The instrument name's GY suffix honours Russian instrument designer Gennady Ya Gus'kov (1919-2002).[^eoportal-meteor-m2]

Channels are arranged in groups covering the 10.6 and 18.7 GHz window frequencies, the 23.8 GHz water-vapour line, the 31.5 and 36.7 GHz window bands, oxygen absorption channels near 42, 48, 52.8, and 57 GHz, a 91.655 GHz window, and water-vapour sounding channels at 175.56, 183.31, and 191.06 GHz.[^wmo-oscar-mtvza-gy] Both horizontal and vertical polarisation are available on imaging channels.[^wmo-oscar-mtvza-gy] Conical scan geometry provides a consistent incidence angle across the 1500 km swath, with a scan period of 2.55 seconds and a scan angle of 53.3 degrees.[^wmo-oscar-mtvza-gy]

Ground resolution varies with frequency: the 65 cm antenna produces an instantaneous field of view of approximately 130 km at 10.6 GHz, 16 km at 91.655 GHz, and approximately 12 km at 183.31 GHz.[^eoportal-meteor-m2][^wmo-oscar-mtvza-gy] The instrument covers near-global area twice daily.[^wmo-oscar-mtvza-gy] Applications include passive microwave surface imaging, atmospheric temperature and humidity profiling through oxygen and water-vapour absorption channels, and precipitation retrieval from window-channel brightness temperatures.[^wmo-oscar-mtvza-gy]

MTVZA-GY is an evolution of the MTVZA microwave radiometer previously flown on Meteor-3M-1.[^eoportal-meteor-m2]

## Compositional position
- meteor-m-n2-4 (missions) --[mission_payloads]--> MTVZA-GY Imaging/Sounding Microwave Radiometer
- meteor-m-n2-3 (missions) --[mission_payloads]--> MTVZA-GY Imaging/Sounding Microwave Radiometer

## Sources
- [wmo-oscar-mtvza-gy] | WMO OSCAR - Instrument Details: MTVZA-GY | https://space.oscar.wmo.int/instruments/view/mtvza_gy | tier=agency-doc | accessed=2026-06-16
- [eoportal-meteor-m2] | Meteor-M2 Meteorological Mission - eoPortal Directory | https://directory.eoportal.org/satellite-missions/meteor-m-2 | tier=community | accessed=2026-06-16
- [wmo-oscar-meteor-m-n2-4] | WMO OSCAR - Satellite: Meteor-M N2-4 | https://space.oscar.wmo.int/satellites/view/meteor_m_n2_4 | tier=agency-doc | accessed=2026-06-16

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