BackForwardInstrument:  SEVIRI 

Instrument details
Acronym SEVIRI
Full name Spinning Enhanced Visible Infra-Red Imager
Type of Instrument 01. Moderate-resolution optical imager
Purpose Multi-purpose imagery and wind derivation by tracking clouds and water vapour features
Short description 12 channels (11 narrow-bandwidth, 1 high-resolution broad-bandwidth VIS) [see detailed characteristics below]
Background New development
Scanning Technique Mechanical, spinning satellite, E-W continuous, S-N stepping
Resolution 4.8 km IFOV, 3 km sampling for narrow channels; 1.6 km IFOV, 1 km sampling for broad VIS channel
Coverage / Cycle Full disk every 15 min.  Limited areas in correspondingly shorter time intervals
Mass 260 kg Power 150 W Data Rate 3.26 Mbps

 

Providing Agency EUMETSAT
Instrument Maturity Flown on operational programme
Utilization Period: 2002-08-28 to ≥2022
Last update: 2012-09-13
Detailed characteristics
Central wavelength Spectral interval (99 % encircled energy) SNR or NEΔT @ specified input
N/A (broad bandwidth channel) 0.6 - 0.9 µm 4.3 @ 1 % albedo
0.635 µm 0.56 - 0.71 µm 10.1 @ 1 % albedo
0.81 µm 0.74 - 0.88 µm 7.28 @ 1 % albedo
1.64 µm 1.50 - 1.78 µm 3 @ 1 % albedo
3.92 µm 3.48 - 4.36 µm 0.35 K @ 300 K
6.25 µm 5.35 - 7.15 µm 0.75 K @ 250 K
7.35 µm 6.85 - 7.85 µm 0.75 K @ 250 K
8.70 µm 8.30 - 9.10 µm 0.28 K @ 300 K
9.66 µm 9.38 - 9.94 µm 1.50 K @ 255 K
10.8 µm 9.80 - 11.8 µm 0.25 K @ 300 K
12.0 µm 11.0 - 13.0 µm 0.37 K @ 300 K
13.4 µm 12.4 - 14.4 µm 1.80 K @ 270 K
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

Contribution to Space Capabilities

The instrument contributes to the following Capabilities, as identified in the "Vision for the GOS in 2025" and the Implementation Plan for the Evolution of Global Observing Systems:

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.
Variable Relevance for measuring this Variable Operational Limitations Processing maturity
Cloud type 2-very high No specific limitation Consolidated methodology
Cloud top temperature 2-very high No specific limitation Consolidated methodology
Cloud top height 2-very high No specific limitation Consolidated methodology
Aerosol volcanic ash (Total column) 2-very high Clouds Consolidated methodology
Cloud cover 2-very high No specific limitation Consolidated methodology
Sea-ice cover 2-very high Clouds Consolidated methodology
Sea surface temperature 3-high Clouds Consolidated methodology
Fire temperature 3-high Clouds Consolidated methodology
Soil moisture at surface 3-high Index only. Clouds Consolidated methodology
Wind (horizontal) 3-high Tracers needed Consolidated methodology
Snow cover 3-high Clouds Consolidated methodology
Integrated Water Vapour (IWV) 3-high Clouds Consolidated methodology
Aerosol Optical Depth 3-high Clouds Consolidated methodology
Photosynthetically Active Radiation (PAR) 3-high Clouds Consolidated methodology
Fire radiative power 4-fair Clouds Consolidated methodology
Cloud drop effective radius 4-fair At cloud top Consolidated methodology
Cloud optical depth 4-fair Cloud not too dense Consolidated methodology
Aerosol volcanic ash 4-fair Clouds Consolidated methodology
Fire fractional cover 4-fair Clouds Consolidated methodology
Aerosol column burden 4-fair Clouds Consolidated methodology
Earth surface albedo 4-fair Clouds Consolidated methodology
Downward long-wave irradiance at Earth surface 4-fair Highly indirect. Clouds Heavily dependent on external info
Short-wave cloud reflectance 4-fair No specific limitation Consolidated methodology
Fraction of Absorbed PAR (FAPAR) 4-fair Clouds Consolidated methodology
Downward short-wave irradiance at Earth surface 4-fair Highly indirect. Clouds Heavily dependent on external info
Aerosol effective radius 4-fair Clouds Heavily model-dependent
Land surface temperature 4-fair Clouds Consolidated methodology
Upward long-wave irradiance at Earth surface 4-fair Highly indirect. Clouds Heavily dependent on external info
Upward short-wave irradiance at TOA 4-fair No specific limitation Consolidated methodology
Cloud ice effective radius 4-fair At cloud top Consolidated methodology
Normalised Difference Vegetation Index (NDVI) 4-fair Clouds Consolidated methodology
Upward long-wave irradiance at TOA 4-fair No specific limitation Consolidated methodology
O3 (Total column) 5-marginal Clouds Consolidated methodology
Aerosol mass mixing ratio 5-marginal Clouds Consolidated methodology
Aerosol type 5-marginal Clouds Heavily dependent on external info
Earth surface short-wave bidirectional reflectance 5-marginal Clouds Heavily model-dependent
Leaf Area Index (LAI) 5-marginal Clouds Consolidated methodology