FCI A Spot

Flexible Combined Imager (FCI)

 

FCI A Spot
FCI A Spot

The Flexible Combined Imager (FCI) provides state-of-the-art data over Europe and Africa for forecasting severe weather, and for near real-time monitoring of our changing atmosphere, land surfaces and oceans.

Last Updated

21 June 2022

Published on

21 May 2020

FCI, on the MTG-I satellite, will continue the very successful operation of the Spinning Enhanced Visible and Infrared Imager (SEVIRI) on Meteosat Second Generation (MSG). Requirements have been formulated by regional and global numerical weather prediction (NWP) and nowcasting communities.

These requirements are reflected in the design which allows for scanning the full Earth disc in 10 minutes in support of the full disc scanning service (FDSS), or the upper quarter of the disc (i.e., Europe) in 2.5 minutes in support of the rapid scanning service (RSS).

The FCI measures in 16 channels in the visible and infrared spectrum of which eight are placed in the solar spectral domain between 0.4µm to 2.2µm, delivering data at a 1km spatial sampling distance (resolution) at nadir (sub-satellite point the centre of the disc). The additional eight channels are in the thermal spectral domain between 3.8µm and 13.3µm, delivering data at 2km spatial sampling distance at nadir. This observation mode is referred to as full disc high spectral resolution imagery (FDHSI) mission.

Furthermore, the FCI samples two channels in the solar domain (0.6µm and 2.2µm) at higher spatial sampling distance of 0.5km. and two channels in the thermal domain (3.8µm and 10.5µm) at higher spatial sampling distance of 1km at nadir. This observation mode is referred to as high spatial resolution fast imagery (HRFI) mission.

With both missions, the FCI instrument supports the full disc scanning service (FDSS) and the rapid scanning service (RSS).

With the FCI on board the MTG-I satellites, Europe will continue to play the leading role in imaging radiometry from the geostationary orbit in the decades to come.

MTG FCi scanning patterns
Figure 1: Animation of the FCI scanning pattern in support of the full disc scanning service (FDSS)
MTG FCi scanning patterns
Figure 2: Animation of the FCI scanning pattern in support of the rapid scanning service (RSS)

Figures 3-5 illustrate the variation of average pixel area in km2 for imagery with 1km spatial sampling distance at nadir, and approximate pixel contours for four selected locations in Europe.

Approximate pixel area in km2 of FCI imagery with 1 km spatial resolution at nadir.
Figure 3: Approximate pixel area in kilometre squared of FCI imagery with 1km spatial resolution at nadir.
Approximate pixel area in km2 of FCI imagery with 1 km spatial resolution at nadir over Europe
Figure 4: Approximate pixel area in kilometre squared of FCI imagery with 1km spatial resolution at nadir, over Europe
Approximate pixel area in km2 of FCI imagery with 1 km spatial resolution at nadir four selected locations
Figure 5: Pixel projections for FCI imagery with 1km spatial resolution at nadir, for four selected locations, using a transverse mercator projection.

Instrument information

Channel Centre Wavelength Spectral Width Spatial Sampling Distance (SSD)
VIS 0.4 0.444µm 0.060µm 1.0km
VIS 0.5 0.510µm 0.040µm 1.0km
VIS 0.6 0.640µm 0.050µm 1.0km; 0.5km
VIS 0.8 0.865µm 0.050µm 1.0km
VIS 0.9 0.914µm 0.020µm 1.0km
NIR 1.3 1.380µm 0.030µm 1.0km
NIR 1.6 1.610µm 0.050µm 1.0km
NIR 2.2 2.250µm 0.050µm 1.0km; 0.5km
IR 3.8 (TIR) 3.800µm 0.400µm 2.0km; 1.0km
WV 6.3 6.300µm 1.000µm 2.0km
WV 7.3 7.350µm 0.500µm 2.0km
IR 8.7 (TIR) 8.700µm 0.400µm 2.0km
IR 9.7 (O3 ) 9.660µm 0.300µm 2.0km
IR 10.5 (TIR) 10.500µm 0.700µm 2.0km; 1.0km
IR 12.3 (TIR) 12.300µm 0.500µm 2.0km
IR 13.3 (CO2 ) 13.300µm 0.600µm 2.0km