BackForwardInstrument:  IMG 

Instrument details
Acronym IMG
Full name Interferometric Monitor for Greenhouse gases
Purpose Atmospheric chemistry. Tracked species: CH4, CO2, H2O, N2O and O3
Short description IR interferometer, spectral range 3.3-14.0 µm (714-3030 cm-1) split in 3 bands [see detailed characteristics below]
Background New development
Scanning Technique Nadir viewing. Along-track sampling at 13 s intervals (86 km)
Resolution 8 km
Coverage / Cycle Global in 1.5 months for cells of 100 km side (duty cycle: 3 days each 13 days)
Mass 130 kg Power 150 W Data Rate 882 kbps

 

Providing Agency METI
Instrument Maturity Flown on an R&D satellite
Utilization Period: 1996 to 1997
Last update: 2020-03-06
Detailed characteristics

Spectral range (µm)

Spectral range (cm-1)

Spectral resolution (apodised)

NESR

5.0-14.0 µm

714-2000 cm-1

0.1 cm-1

0.230 mW·m-2·cm

4.3-5.0 µm

2000-2325 cm-1

0.25 cm-1

0.020 mW·m-2·cm

3.3-4.3 µm

2325-3030 cm-1

0.15 cm-1

0.014 mW·m-2·cm

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
  • Cross-nadir infrared sounder, possibly including VIS channels
WIGOS Subcomponents
  • Subcomponent 1
  • IR hyperspectral sounders [in SSO]
  • IR hyperspectral sounder [in SSO]
Mission objectives
Primary mission objectives
  • C2H2
  • C2H6
  • CFC-11
  • CFC-12
  • CH3Br
  • CH4 mole fraction
  • CO
  • CO2 mole fraction
  • COS
  • ClONO2
  • H2O
  • HCFC-22
  • HNO3
  • N2O mole fraction
  • N2O5
  • NO
  • NO2
  • NO2 Total Column
  • O3
  • O3 Total Column
  • PAN
  • SF6
  • SO2
  • SO2 Total Column
Evaluation of Measurements