BackForwardInstrument:  METimage 

Instrument details
Acronym METimage
Full name Meteorological Imager (Previous name: VII - Visible and Infrared Imager )
Purpose Multi-purpose imagery with enhanced capability for aerosol and cloud microphysics
Short description
  • 20 VIR/IR channels [see detailed characteristics below]
  • Monitoring and calibration information here
Background

Replacing AVHRR/3 on MetOp A/B/C
Scanning Technique

Derived from a whisk-broom scanner principle, the instrument records 24 image lines simultaneously during each scan across-track with a swath width of ±54 degrees. Swath width approx 2670 km
Resolution 0.5 km for all channels, at s.s.p.
Coverage / Cycle Global coverage twice/day (long-wave channels) or once/day (short-wave channels)
Mass 262 kg Power 140 W Data Rate 20 Mbps

 

Providing Agency DLR
Instrument Maturity Backed by strong heritage
Utilization Period: 2025 to 2047
Last update: 2024-09-23
Detailed characteristics

Channel

Central wavelength

Bandwidth

SNR or NE∆T at specified input

IFOV at s.s.p.

VII-4

443 nm

30 nm

221 @ 42 W m-2 sr-1 µm-1

500 m

VII-8

555 nm

20 nm

215 @ 22 W m-2 sr-1 µm-1

500 m

VII-12

668 nm

20 nm

66 @ 9.5 W m-2 sr-1 µm-1

500 m

VII-15

751.5 nm

10 nm

400 @ 28 W m-2 sr-1 µm-1

500 m

VII-16

762.7 nm

11.5 nm

400 @ 20 W m-2 sr-1 µm-1

500 m

VII-17

865 nm

20 nm

60 @ 6.04 W m-2 sr-1 µm-1

500 m

VII-20

914 nm

20 nm

250 @ 15 W m-2 sr-1 µm-1

500 m

VII-22

1240 nm

20 nm

75 @ 5.4 W m-2 sr-1 µm-1

500 m

VII-23

1375 nm

40 nm

300 @ 6 W m-2 sr-1 µm-1

500 m

VII-24

1630 nm

20 nm

300 @ 7.3 W m-2 sr-1 µm-1

500 m

VII-25

2250 nm

50 nm

110 @ 1 W m-2 sr-1 µm-1

500 m

VII-26

3.74 µm

0.18 µm

0.050 K @ 300 K

500 m

VII-28

3.959 µm

0.06 µm

0.074 K @ 300 K

500 m

VII-30

4.05 µm

0.06 µm

0.074 K @ 300 K

500 m

VII-33

6.725 µm

0.37 µm

0.215 K @ 238 K

500 m

VII-34

7.325 µm

0.29 µm

0.200 K @ 250 K

500 m

VII-35

8.54 µm

0.29 µm

0.050 K @ 300 K

500 m

VII-37

10.69 µm

0.50 µm

0.050 K @ 300 K

500 m

VII-39

12.02 µm

0.50 µm

0.050 K @ 300 K

500 m

VII-40

13.345 µm

0.31 µm

0.200 K @ 260 K

500 m
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 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
  • Biomass
  • Cloud cover
  • Cloud optical depth
  • Cloud top height
  • Cloud top temperature
  • Cloud type
  • Fraction of Absorbed PAR (FAPAR)
  • Integrated Water Vapour (IWV)
  • Leaf Area Index (LAI)
  • Normalised Difference Vegetation Index (NDVI)
  • Sea surface temperature
  • Sea-ice cover
Evaluation of Measurements