WMO OSCAR | Details for Instrument MTVZA-OK (MW)

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Instrument: MTVZA-OK (MW)

Instrument details

Acronym	MTVZA-OK (MW)
Full name	Combined Microwave-Optical Imaging/Sounding Radiometer (MW component)
Purpose	Multi-purpose MW imagery and temperature/humidity sounding, as well as sea-surface vector wind
Short description	22-frequency / 39 channels, including 54 and 183 GHz bands and multi-polarisation of three channels for wind speed and direction [see detailed characteristics below]
Background	Part of a combined MW imaging radiometer and VIS/IR imager
Scanning Technique	Conical, 55.4° viewing angle, 21 scan/min (19 km/scan), swath 2000 km
Resolution	Ranging from 12 km at 183 GHz to 170 km at 6.9 GHz, consistent with an antenna diameter of 60 cm
Coverage / Cycle	Global each day
Mass		Power	Data Rate

Providing Agency	NSAU
Instrument Maturity	Flown on an R&D satellite
Utilization Period:	2005 to 2006
Last update:	2019-11-14

Detailed characteristics

No.	Central frequency (GHz)	Bandwidth (MHz)	Polarisations	NEΔT	IFOV	Pixel
1	6.9	350	V, H	0.3	112x260 km	38x38 km
2	10.6	100	V, H, P,M	0.5	76x177 km	38x38 km
3	18.7	200	V, H.P.M. R, L	0.4	45x104 km	38x38 km
4	23.8	400	V, H	0.3	36x86 km	38x38 km
5	31.5	1000	V, H, P, M	0.3	30x69 km	38x38 km
6	36.7	1000	V, H	0.4	26x60 km	38x38 km
7	42	1000	V, H	0.4	22x53 km	38x38 km
8	48	1000	V, H	0.4	21x47 km	38x38 km
9	52.80	400	V	0.4	18x43 km	38x38 km
10	53.30	400	V	0.4	18x43 km	38x38 km
11	53.80	400	V	0.4	18x43 km	38x38 km
12	54.64	400	V	0.4	18x43 km	38x38 km
13	55.63	400	V	0.4	18x43 km	38x38 km
14	57.290344±0.3222±0.1	50	H	0.4	18x43 km	57x57 km
15	57.290344±0.3222±0.05	20	H	0.7	18x43 km	57x57 km
16	57.290344±0.3222±0.025	10	H	0.9	18x43 km	57x57 km
17	57.290344±0.3222±0.01	5	H	1.3	18x43 km	57x57 km
18	57.290344±0.3222±0.005	3	H	1.7	18x43 km	57x57 km
19	91.65	2000	V, H	0.6	12x28 km	19x19 km
20	183.31±7.0	1500	V	0.5	8x19 km	38x38 km
21	183.31±3.0	1000	V	0.6	8x19 km	38x38 km
22	183.31±1.0	500	V	0.8	8x19 km	38x38 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

Okean Operational 1 (NSAU)
- SICH-1M (see instrument status) Mar 2005 - Apr 2006

Instrument classification

Earth observation instrument
Passive microwave radiometer
Conical scanning microwave radiometer

WIGOS Subcomponents

Subcomponent 1
MW imagery [in SSO]
MW imager [in SSO]

Mission objectives

Primary mission objectives

Precipitation intensity at surface (liquid or solid)
Sea surface temperature
Sea-ice cover
Wind speed (near surface)
Wind vector (near surface)

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
Note: * Primary mission objective.

Search:

Variable	Relevance for measuring this variable	Operational limitations	Explanation
Integrated Water Vapour (IWV)	1 - primary	No specific limitation.	MW channel(s) in the water vapour bands around 23 and 183 GHz
Atmospheric temperature	2 - very high	Coarse vertical resolution.	Many MW channels in the 54 GHz band. Nearly all-weather sounding
Cloud ice effective radius	2 - very high	No specific limitation.	MW channels around 37 and 90 GHz, and in bands 54 and 183 GHz
Cloud liquid water (CLW)	2 - very high	No specific limitation.	MW channels around 37 and 90 GHz, and in bands 54 and 183 GHz
Cloud liquid water (CLW) total column	2 - very high	No specific limitation.	MW channels around 37 and 90 GHz, and in bands 54 and 183 GHz
Sea surface temperature*	2 - very high	No specific limitation.	MW channels with more frequencies around 7 and 10 GHz to reduce sensitivity to radio-frequency interferences
Snow status (wet/dry)	2 - very high	Coarse spatial resolution.	MW channels around 19, 37 and 90 GHz. Higher frequencies less sensitive to emissivity from ground under snow
Snow water equivalent	2 - very high	Coarse spatial resolution.. Ground stations network needed.	MW channels around 19, 37 and 90 GHz. Higher frequencies less sensitive to emissivity from ground under snow
Specific humidity	2 - very high	Coarse vertical resolution.	MW channels in the 183 GHz band, and 54 GHz for temperature and liquid water corrections
Wind speed (near surface)*	2 - very high	Over sea only.	MW channels around 7, 10, 19 and 37 GHz
Accumulated precipitation	3 - high	Poor 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
Biomass	3 - high	Index only.. Coarse spatial resolution.	Derived from differential effect of vegetation across MW frequencies around 7, 10 and 19 GHz
Cloud ice	3 - high	No specific limitation.	MW channels around 37 and 90 GHz, and in bands 54 and 183 GHz
Cloud ice Total Column	3 - high	No specific limitation.	MW channels around 37 and 90 GHz, and in bands 54 and 183 GHz
Freezing level height in clouds	3 - high	No specific limitation.	MW channels in the 54 GHz band. Inference from the temperature profile
Long-wave Earth surface emissivity	3 - high	Long time series needed.	MW channels around 7, 10, 19, 37 and 90 GHz. Emissivity across this MW range inferred by statistical analysis
Melting layer depth in clouds	3 - high	No specific limitation.	MW channels in the 54 GHz band. Inference from the temperature profile
Precipitation intensity at surface (liquid or solid)*	3 - high	No 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
Snow cover	3 - high	Coarse spatial resolution.	MW channels around 19, 37 and 90 GHz. Higher frequencies less sensitive to emissivity from ground under snow
Soil moisture at surface	3 - high	Coarse spatial resolution.. Affected by vegetation.	MW channels around 7 and 10 GHz
Wind vector (near surface)*	3 - high	Over sea only.	MW channels for 3 or 4 Stokes parameters at frequencies around 10, 19 and 37 GHz
Sea-ice cover*	3 - high	No specific limitation.	MW channels around 7, 10, 19, 37 and 90 GHz
Soil moisture (in the roots region)	4 - fair	Coarse spatial resolution.. Affected by vegetation.	MW channels around 7 GHz. Assimilation process required
Sea-ice type	4 - fair	No specific limitation.	MW channels around 7, 10, 19, 37 and 90 GHz. Type interpreted as age/roughness
Downward long-wave irradiance at Earth surface	5 - marginal	Highly indirect.	MW channels in bands 54 and 183 GHz to account for downward cloud radiation
Land surface temperature	5 - marginal	Coarse spatial resolution.	MW channels with more frequencies around 7 and 10 GHz to reduce sensitivity to radio-frequency interferences
Upward long-wave irradiance at Earth surface	5 - marginal	Highly indirect.	MW channels is the 54 and 183 GHz bands to infer the impact of clouds on the upward LW radiation
Cloud drop effective radius	5 - marginal	Highly indirect.	MW channels around 37 and 90 GHz, and in bands 54 and 183 GHz

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