WMO OSCAR | Details for Instrument STR (Electro)

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Instrument: STR (Electro)

Instrument details

Acronym	STR (Electro)
Full name	Scanning TV Radiometer
Purpose	Cloud observation
Short description	2-channel radiometer, VIS (0.46-0.7 µm) and TIR (10.5-12.5 µm)
Background	New development
Scanning Technique	Mechanical scanning, E-W and N-S (3-axis stabilised platform)
Resolution	VIS: 1.25 km at s.s.p.; TIR: 6.25 km at s.s.p.
Coverage / Cycle	Full disk at 30 min intervals
Mass		Power	Data Rate	2.56 Mbps

Providing Agency	Roscosmos
Instrument Maturity	Flown on operational programme
Utilization Period:	1995 to 2000
Last update:	2017-03-27

Detailed characteristics

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

Electro (RosHydroMet)
- Electro-GOMS (see instrument status) Jan 1995 - Nov 2000

Instrument classification

Earth observation instrument
Passive optical radiometer or spectrometer
Moderate resolution optical imager

WIGOS Subcomponents

Subcomponent 1
VIS/IR imagery; realisation of a Day/Night band [in SSO]
VIS/IR imager [in SSO]

Mission objectives

Primary mission objectives

Cloud cover
Cloud top temperature
Cloud type
Wind (horizontal)

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
Aerosol volcanic ash Total Column	1 - primary	Cloud sensitive.	TIR channel(s). Frequent sampling (GEO) enables early detection of ash plumes
Precipitation intensity at surface (liquid or solid)	3 - high	Convective precipitation dominant.. Calibration by MW needed.	TIR channel(s) in the 11 micrometers window. Frequent sampling (GEO) consistent with precipitation temporal variability
Cloud cover*	4 - fair	No specific limitation.	VIS and TIR channels
Cloud type*	4 - fair	Daylight only.	VIS and TIR channels
Fire fractional cover	4 - fair	Cloud sensitive.. Coarse spatial resolution.	VIS and TIR channels
Soil moisture at surface	4 - fair	Cloud sensitive.. Index only.	VIS and TIR window channels. Soil moisture inferred from thermal inertia, that is accurately measured by frequent sampling (GEO)
Wind (horizontal)*	4 - fair	Cloud or water vapour tracers needed.	VIS channel(s) and TIR channel(s) around 11 micrometers window. Frequent sampling (GEO) enables inference from cloud motion
Accumulated precipitation	4 - fair	Convective precipitation dominant.. Calibration by MW needed.	TIR channel(s) in the 10-13 micrometers range. Frequent sampling (GEO) is essential for accumulated precipitation.
Cloud top temperature*	5 - marginal	No specific limitation.	TIR window channel(s)
Fire radiative power	5 - marginal	Cloud sensitive.. Coarse spatial resolution.	TIR channels. Frequent sampling (GEO) enables early detection
Fire temperature	5 - marginal	Cloud sensitive.. Coarse spatial resolution.	TIR channels. Frequent sampling (GEO) enables early detection
Sea surface temperature	5 - marginal	Cloud sensitive.	TIR window channel(s) around 11 micrometers .
Snow cover	5 - marginal	Cloud sensitive.. Daylight only.	VIS channel(s). Frequent sampling (GEO) improves probability of cloud-free views

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