BackForwardInstrument:  IKFS-2 

Instrument details
Acronym IKFS-2
Full name Infrared Fourier Spectrometer - 2
Purpose Temperature/humidity sounding, ozone profile and total-column green-house gases
Short description IR interferometer, 2670 channels [see detailed characteristics below]
Background New development
Scanning Technique Cross-track: 30 steps to cover a swath of 1000 km if contiguous, up to 2500 km with gaps
Resolution 35 km at s,s,p.
Coverage / Cycle Near-global coverage twice/day (with gaps) or once/day (continuous)
Mass 50 kg Power 50 W Data Rate 600 kbps

 

Providing Agency Roscosmos
Instrument Maturity Backed by strong heritage
Utilization Period: 2015-01-15 to ≥2028
Last update: 2017-07-18
Detailed characteristics
Spectral range (µm) Spectral range (cm-1) Spectral resolution (unapodised) NEΔT @ specified scene temperature
5-15 µm 665-2000 cm-1 0.5 cm-1 0.5 K @ 280 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

Instrument classification
  • Earth observation instrument
  • Passive optical radiometer or spectrometer
  • Cross-nadir infrared sounder, possibly including VIS channels
Mission objectives
Primary mission objectives
  • Atmospheric temperature
  • Height of the top of PBL
  • Height of the tropopause
  • Integrated Water Vapour (IWV)
  • Specific humidity
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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
VariableRelevance for measuring this variableOperational limitationsExplanation
Atmospheric temperature2 - very highCloud sensitive.. Inaccurate in low troposphere.TIR spectrometry in the 15 micrometer band
C2H25 - marginalCloud sensitive.. Coarse vertical resolution.TIR spectrometry. C2H2 lines around 7.5 and 13.7 micrometers
C2H65 - marginalCloud sensitive.. Coarse vertical resolution.TIR spectrometry. C2H6 lines around 12 micrometers
CFC-115 - marginalCloud sensitive.. Coarse vertical resolution.TIR spectrometry. CFC-11 lines around 9.2 and 11.7 micrometers
CFC-125 - marginalCloud sensitive.. Coarse vertical resolution.TIR spectrometry. CFC-12 lines around 8.8 and 10.8 micrometers
CH45 - marginalCloud sensitive.. Coarse vertical resolution.TIR spectrometry. CH4 lines around 7.7 micrometers
ClONO25 - marginalCloud sensitive.. Coarse vertical resolution.MWIR and TIR spectrometry. ClONO2 lines around 5.7, 7.7 and 12.5 micrometers
Cloud cover4 - fairDiscontinuous coverage.TIR spectrometry
Cloud top height1 - primaryDiscontinuous coverage.MWIR and TIR spectrometry in window and water vapour band (for emissivity) to estimate cloud top height from its temperature
Cloud top temperature1 - primaryDiscontinuous coverage.TIR spectrometry in window and water vapour band (for emissivity)
CO25 - marginalCloud sensitive.. Coarse vertical resolution.TIR spectrometry. CO2 lines around 15 micrometers
COS5 - marginalCloud sensitive.. Coarse vertical resolution.TIR spectrometry. COS lines around 11.6 micrometers
Downward long-wave irradiance at Earth surface5 - marginalCloud sensitive.. Highly indirect.MWIR and TIR spectrometry including water vapour and CO2 bands
H2O4 - fairCloud sensitive.. Coarse vertical resolution.MWIR/TIR spectrometry in a range centred on 6.3 micrometers
Height of the top of PBL5 - marginalCloud sensitive.TIR spectrometry. Height of PBL top from temperature profile
Height of the tropopause5 - marginalCloud sensitive.TIR spectrometry. Height of tropopause from temperature profile
HNO35 - marginalCloud sensitive.. Coarse vertical resolution.MWIR and TIR spectrometry. HNO3 lines around 5.9, 7.6 and 11.3 micrometers
Land surface temperature4 - fairCloud sensitive.. Coarse spatial resolution.TIR spectrometry (inclusive of several narrow-bandwidth windows and absorption bands for atmospheric corrections)
Long-wave Earth surface emissivity4 - fairCloud sensitive.. Long time series needed.MWIR and TIR spectrometry measuring land temperature in many windows. Emissivity inferred by statistical analysis
N2O5 - marginalCloud sensitive.. Coarse vertical resolution.TIR spectrometry. N2O lines around 7.7 micrometers
N2O55 - marginalCloud sensitive.. Coarse vertical resolution.MWIR and TIR spectrometry. N2O5 lines around 5.8 and 8 micrometers
NO5 - marginalCloud sensitive.. Coarse vertical resolution.MWIR spectrometry. NO lines around 5.3 micrometers
NO25 - marginalCloud sensitive.. Coarse vertical resolution.TIR spectrometry. NO2 lines around 6.1 micrometers
NO2 (Total column)5 - marginalCloud sensitive.TIR spectrometry. NO2 lines around 6.1 micrometers
O34 - fairCloud sensitive.. Coarse vertical resolution.TIR spectrometry. Ozone band around 9.7 micrometers
O3 (Total column)4 - fairCloud sensitive.TIR channel(s). Ozone lines in band around 9.7 micrometers
PAN5 - marginalCloud sensitive.. Coarse spatial resolution.MWIR and TIR spectrometry. PAN lines around 5.7, 8.6 and 12.5 micrometers
PSC occurrence4 - fairCoarse vertical resolution.MWIR and TIR spectroscopy
Sea surface temperature3 - highCloud sensitive.TIR spectrometry (inclusive of several narrow-bandwidth windows and absorption bands for atmospheric corrections)
SF65 - marginalCloud sensitive.. Coarse vertical resolution.TIR spectrometry. SF6 lines around 10.5 micrometers
SO24 - fairCloud sensitive.. Coarse vertical resolution.TIR spectrometry. SO2 lines around 7.3 and 8.6 micrometers
SO2 (Total column)4 - fairCloud sensitive.TIR spectrometry. SO2 lines around 7.3 and 8.6 micrometers
Specific humidity2 - very highCloud sensitive.TIR spectrometry in the water vapour band around 6.3 micrometers
Integrated Water Vapour (IWV)2 - very highCloud sensitive.TIR spectrometry in the bands around 6.3 and above 11 micrometers
Temperature of the tropopause4 - fairCloud sensitive.TIR spectrometry. Tropopause temperature from temperature profile
Upward spectral radiance at TOA4 - fairMissing all Short-waves.MWIR and TIR spectrometry resolving water vapour lines in the bands around 6.3 micrometers and 11 to 15 micrometers
Upward long-wave irradiance at TOA3 - highSpectral interpolation needed.TIR spectrometry covering the 11 micrometers window region and the water vapour and CO2 bands around 6.3 and 15 micrometers
Upward long-wave irradiance at Earth surface4 - fairCloud sensitive.. Highly indirect.TIR spectrometry covering the 11 micrometers window region and the water vapour and CO2 bands around 6.3 and 15 micrometers