BackForwardInstrument:  MSU-GS 

Instrument details
Acronym MSU-GS
Full name Electro-L Imager
Purpose Multi-purpose imagery and wind derivation by tracking clouds and water vapour features
Short description 10 VIS/NIR/MWIR/TIR channels [see detailed characteristics below]
Background New development
Scanning Technique Mechanical, 3-axis stabilised satellite, E-W continuous, S-N stepping
Resolution 4.0 km for the IR channels, 1.0 km for the VNIR channels
Coverage / Cycle Full disk every 15-30 min.
Mass 106 kg Power 150 W Data Rate 15 Mbps

 

Providing Agency Roscosmos
Instrument Maturity Flown on operational programme
Utilization Period: 2012-01-15 to ≥2032
Last update: 2017-03-27
Detailed characteristics

Central wavelength

Spectral interval

SNR or NEΔT @ specified input

0.57 µm

0.50 - 0.65 µm

200 @ 100 % albedo

0.72 µm

0.65 - 0.80 µm

200 @ 100 % albedo

0.86 µm

0.80 - 0.90 µm

200 @ 100 % albedo

3.75 µm

3.50 - 4.00 µm

0.35 K @ 300 K

6.35 µm

5.70 - 7.00 µm

0.4 K @ 300 K

8.00 µm

7.50 - 8.50 µm

0.1 K @ 300 K

8.70 µm

8.20 - 9.20 µm

0.15 K @ 300 K

9.70 µm

9.20 - 10.2 µm

0.15 K @ 300 K

10.7 µm

10.2 - 11.2 µm

0.15 K @ 300 K

11.7 µm

11.2 - 12.5 µm

0.25 K @ 300 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
  • Moderate resolution optical imager
Mission objectives
Primary mission objectives
  • Cloud cover
  • Cloud optical depth
  • Cloud top height
  • Cloud top temperature
  • Cloud type
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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
Biomass5 - marginalCloud sensitive.. Index only.. Daylight only.VIS and NIR channels. Biomass inferred from NDVI
Cloud drop effective radius5 - marginalAt cloud top.. Daylight only.VIS, NIR and MWIR channels (for differentiation)
Cloud ice effective radius5 - marginalAt cloud top.. Daylight only.VIS, NIR and MWIR channels (for differentiation)
Downward short-wave irradiance at Earth surface5 - marginalCloud sensitive.. Highly indirect.VIS and NIR channels
Downward long-wave irradiance at Earth surface5 - marginalCloud sensitive.. Highly indirect.MWIR and TIR channels including the water vapour band
Earth surface short-wave bidirectional reflectance5 - marginalCloud sensitive.VIS and NIR channels with changing solar incidence angles as daylight progresses
Fire fractional cover2 - very highCloud sensitive.. Coarse spatial resolution.VIS, MWIR and TIR channels. Frequent sampling (GEO) enables early detection
Fire radiative power2 - very highCloud sensitive.. Coarse spatial resolution.MWIR and TIR channels. Frequent sampling (GEO) enables early detection
Fire temperature2 - very highCloud sensitive.. Coarse spatial resolution.MWIR and TIR channels. Frequent sampling (GEO) enables early detection
Land surface temperature4 - fairCloud sensitive.MWIR and TIR window channels (high sensitivity to high temperature, cloud impact reduction, water vapour correction)
Normalised Difference Vegetation Index (NDVI)2 - very highCloud sensitive.VIS and NIR channels
O3 (Total column)4 - fairCloud sensitive.TIR channel(s). Ozone lines in band around 9.7 micrometers. Frequent sampling (GEO) enables monitoring diurnal variations
Precipitation intensity at surface (liquid or solid)5 - marginalConvective precipitation dominant.. Calibration by MW needed.TIR channel(s) in the 11 micrometers window. Frequent sampling (GEO) consistent with precipitation temporal variability
Short-wave cloud reflectance4 - fairNo specific limitation.VIS and NIR channels
Snow cover4 - fairCloud sensitive.. Daylight only.VIS and NIR channels. Frequent sampling (GEO) improves probability of cloud-free views
Soil moisture at surface3 - highCloud sensitive.. Index only.VIS, NIR, MWIR and TIR channels. Soil moisture inferred from differential brightness and thermal inertia, that are accurately measured by frequent sampling (GEO)
Upward short-wave irradiance at TOA4 - fairSpectral interpolation needed.VIS and NIR channels with changing solar incidence angles as daylight progresses
Upward long-wave irradiance at TOA5 - marginalSpectral interpolation needed.MWIR and TIR channels in windows around 3.7 and 11 micrometers, and in the water vapour band around 6.3 micrometers
Upward long-wave irradiance at Earth surface5 - marginalCloud sensitive.. Highly indirect.MWIR and TIR channels in windows around 3.7 and 11 micrometers, and in the water vapour band around 6.3 micrometers
Wind (horizontal)3 - highCloud or water vapour tracers needed.VIS channel(s) and TIR channels around 6.3 and 11 micrometers. Frequent sampling (GEO) enables inference from cloud or water vapour pathces motion
Accumulated precipitation (over 24 h)3 - highConvective precipitation dominant.. Calibration by MW needed.TIR channel(s) in the 10-13 micrometers range. Frequent sampling (GEO) is essential for accumulated precipitation
Aerosol volcanic ash5 - marginalCloud sensitive.. Daylight only.VIS and NIR channels
Aerosol volcanic ash (Total column)1 - primaryCloud sensitive.TIR channel(s). Frequent sampling (GEO) enables early detection of ash plumes
Integrated Water Vapour (IWV)2 - very highCloud sensitive.TIR channels around 6.3 micrometers and in the 11 micrometers split window
Specific humidity3 - highCloud sensitive.. Coarse vertical resolution.. Middle troposphere only.TIR channels in the water vapour band around 6.3 micrometers
Sea surface temperature2 - very highCloud sensitive.MWIR and TIR window channels around 3.7 and 11 micrometers (cloud impact reduction, water vapour correction)
Leaf Area Index (LAI)4 - fairCloud sensitive.. Daylight only.VIS and NIR channels. LAI inferred from NDVI
Cloud cover2 - very highNo specific limitation.VIS, NIR, MWIR and TIR channels
Cloud top temperature2 - very highNo specific limitation.TIR channels in window and water vapour band (for emissivity)
Cloud top height3 - highNo specific limitation.TIR channels in window and water vapour band (for emissivity) to estimate cloud top height from its temperature
Cloud type2 - very highNo specific limitation.VIS, NIR, MWIR and TIR channels
Cloud optical depth4 - fairLow-density cloud only.. Daylight only.VIS and NIR channels