BackForwardInstrument:  MTVZA-GY 

Instrument details
Acronym MTVZA-GY
Full name Imaging/Sounding Microwave Radiometer - improved
Purpose Multi-purpose imager with temperature/humidity sounding channels for improved precipitation
Short description 21-frequency / 29-channels, including bands 54 and 183 GHz [see detailed characteristics below]
Background Evolution of MTVZA flown on Meteor-3M
Scanning Technique Conical: 53.3° viewing angle, swath 1500 km – Scan rate: 24.9 scan/min = 15.8 km/scan
Resolution From 12 km at 183 GHz to 130 km at 10.6 GHz; consistent with an antenna diameter of 65 cm
Coverage / Cycle Near-global coverage twice/day
Mass 90 kg Power 80 W Data Rate 35 kbps

 

Providing Agency Roscosmos
Instrument Maturity Flown on operational programme
Utilization Period: 2010-04-15 to ≥2028
Last update: 2017-07-18
Detailed characteristics
Central frequency (GHz) Bandwidth (MHz) Polarisations NEΔT IFOV Pixel
10.6 100 V, H 0.5 K 89 x 198 km 32 x 32 km
18.7 200 V, H 0.4 K 52 x 116 km 32 x 32 km
23.8 400 V, H 0.3 K 42 x 94 km 32 x 32 km
31.5 400 V, H 0.3 K 35 x 76 km 32 x 32 km
36.7 400 V, H 0.3 K 30 x 67 km 32 x 32 km
42.0 400 V, H 0.4 K 26 x 60 km 32 x 32 km
48.0 400 V, H 0.4 K 24 x 43 km 32 x 32 km
52.80 400 V 0.4 K 21 x 48 km 48 x 48 km
53.30 400 V 0.4 K 21 x 48 km 48 x 48 km
53.80 400 V 0.4 K 21 x 48 km 48 x 48 km
54.64 400 V 0.4 K 21 x 48 km 48 x 48 km
55.63 400 V 0.4 K 21 x 48 km 48 x 48 km
57.290344±0.3222±0.1 50 H 0.4 K 21 x 48 km 48 x 48 km
57.290344±0.3222±0.05 20 H 0.7 K 21 x 48 km 48 x 48 km
57.290344±0.3222±0.025 10 H 0.9 K 21 x 48 km 48 x 48 km
57.290344±0.3222±0.01 5 H 1.3 K 21 x 48 km 48 x 48 km
57.290344±0.3222±0.005 3 H 1.7 K 21 x 48 km 48 x 48 km
91.655 2500 V, H 0.6 K 14 x 30 km 16 x 16 km
183.31 ± 7.0 1500 V 0.5 K 9 x 21 km 32 x 32 km
183.31 ± 3.0 1000 V 0.6 K 9 x 21 km 32 x 32 km
183.31 ± 1.0 500 V 0.8 K 9 x 21 km 32 x 32 km
Satellites this instrument is flying on

Note: a red tag indicates satellites no longer operational, a green tag indicates operational satellites, a blue tag indicates future satellites

Instrument classification
  • Earth observation instrument
  • Passive microwave radiometer
  • Conical scanning microwave radiometer
Mission objectives
Primary mission objectives
  • Precipitation intensity at surface (liquid or solid)
  • Sea-ice cover
  • Wind speed over the surface (horizontal)
Secondary mission objectives
  • Atmospheric temperature
  • Cloud ice (total column)
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Tentative Evaluation of Measurements

The following list indicates which measurements can typically be retrieved from this category of instrument. To see a full Gap Analysis by Variable, click on the respective variable.

Note: table can be sorted by clicking on the column headers
VariableRelevance for measuring this variableOperational limitationsExplanation
Accumulated precipitation (over 24 h)3 - highPoor time sampling.. Time sampling to be interpolated by GEO.MW channels around 10, 19, 23, 37 and 90 GHz and in 54 and 183 GHz bands
Atmospheric temperature3 - highCoarse vertical resolution.Many MW channels in the 54 GHz band. Nearly all-weather sounding
Cloud drop effective radius4 - fairNo specific limitation.MW channels around 37 and 90 GHz, and in bands 54 and 183 GHz
Cloud ice4 - fairNo specific limitation.MW channels around 37 and 90 GHz, and in bands 54 and 183 GHz
Cloud ice (total column)3 - highNo specific limitation.MW channels around 37 and 90 GHz, and in bands 54 and 183 GHz
Cloud ice effective radius4 - fairNo specific limitation.MW channels around 37 and 90 GHz, and in bands 54 and 183 GHz
Cloud liquid water (CLW)3 - highNo specific limitation.MW channels around 37 and 90 GHz, and in bands 54 and 183 GHz
Cloud liquid water (CLW) total column2 - very highNo specific limitation.MW channels around 37 and 90 GHz, and in bands 54 and 183 GHz
Downward long-wave irradiance at Earth surface5 - marginalHighly indirect.MW channels in bands 54 and 183 GHz to account for downward cloud radiation
Freezing level height in clouds3 - highNo specific limitation.MW channels in the 54 GHz band. Inference from the temperature profile
Land surface temperature5 - marginalCoarse spatial resolution.MW channels around 10 GHz
Long-wave Earth surface emissivity4 - fairLong time series needed.MW channels around 10, 19, 37 and 90 GHz. Emissivity across this MW range inferred by statistical analysis
Melting layer depth in clouds3 - highNo specific limitation.MW channels in the 54 GHz band. Inference from the temperature profile
Precipitation intensity at surface (liquid or solid)2 - very highNo specific limitation.MW channels around 10, 19, 23, 37 and 90 GHz, and in bands 54 and 183 GHz (for atmospheric structure). To cover sea and land, heavy and light precipitation
Sea surface temperature5 - marginalWarm temperature only.MW channels around 10 GHz
Sea-ice cover3 - highNo specific limitation.MW channels around 10, 19, 37 and 90 GHz
Sea-ice type4 - fairNo specific limitation.MW channels around 10, 19, 37 and 90 GHz. Type interpreted as age/roughness
Snow cover3 - highCoarse spatial resolution.MW channels around 19, 37 and 90 GHz. Higher frequencies less sensitive to emissivity from ground under snow
Snow status (wet/dry)3 - highCoarse spatial resolution.MW channels around 19, 37 and 90 GHz. Higher frequencies less sensitive to emissivity from ground under snow
Snow water equivalent4 - fairCoarse spatial resolution.. Ground stations network needed.MW channels around 19, 37 and 90 GHz. Higher frequencies less sensitive to emissivity from ground under snow
Soil moisture at surface5 - marginalCoarse spatial resolution.. Strongly affected by vegetation.MW channels around 10 GHz
Specific humidity4 - fairCoarse vertical resolution.MW channels in the 183 GHz band, and 54 GHz for temperature and liquid water corrections
Integrated Water Vapour (IWV)1 - primaryNo specific limitation.MW channel(s) in the water vapour bands around 23 and 183 GHz
Upward long-wave irradiance at Earth surface4 - fairHighly indirect.MW channels is the 54 and 183 GHz bands to infer the impact of clouds on the upward LW radiation
Wind speed over the surface (horizontal)3 - highOver sea only.MW channels around 10, 19 and 37 GHz