BackForwardInstrument:  TROPOMI 

Instrument details
Acronym TROPOMI
Full name Tropospheric Monitoring Instrument
Purpose Atmospheric chemistry. Tracked species: BrO, CH4, ClO, CO, CO2, H2O, HCHO, N2O, NO, NO2, NO3, O2, O3, O4, OClO, SO2 and aerosol
Short description Grating spectrometers covering 3 spectral bands in the range 270-2385 nm [see detailed characteristics below]
Background New development
Scanning Technique Pushbroom, swath 2600 km
Resolution 7 km at s.s.p.
Coverage / Cycle Global coverage every day, in daylight
Mass 220 kg Power 170 W Data Rate 310 Mbps

 

Providing Agency ESA
Instrument Maturity Backed by strong heritage
Utilization Period: ≥2018-01 to ≥2024
Last update: 2017-03-29
Detailed characteristics
Spectral ranges Number of channels Spectral resolution SNR @ expected input radiance
270-495 nm 1200 0.55 nm 1000
710-775 nm 600 0.55 nm 500
2305-2385 nm 800 0.25 nm 100
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 shortwave (UV/VIS) sounder
Mission objectives
Primary mission objectives
  • BrO
  • CH4
  • CO
  • CO2
  • ClO
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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
Aerosol column burden2 - very highCloud sensitive.. Daylight only.UV (for absorbing aerosol), VIS, NIR and SWIR spectrometry including the 760 nm band for high-level aerosol
Aerosol effective radius4 - fairCloud sensitive.. Daylight only.UV, VIS, NIR (including the 760 nm band for high-level aerosol) and SWIR spectrometry
Aerosol mass mixing ratio3 - highCloud sensitive.. Daylight only.UV (for absorbing aerosol), VIS, NIR (including the 760 nm band for high-level aerosol) and SWIR spectrometry
Aerosol Optical Depth2 - very highCloud sensitive.. Daylight only.UV, VIS, NIR and SWIR spectrometry including the 760 nm band for high-level aerosol
Aerosol type3 - highCloud sensitive.. Daylight only.UV (for absorbing aerosol), VIS, NIR and SWIR spectrometry including the 760 nm band for high-level aerosol
BrO4 - fairCloud sensitive.. Daylight only.UV spectrometry. BrO lines around 300 nm
HCHO 4 - fairCloud sensitive.. Coarse vertical resolution.. Daylight only.UV spectrometry. HCHO lines around 350 nm
HCHO (Total Column)4 - fairCloud sensitive.. Daylight only.UV spectrometry. HCHO lines around 350 nm
CH44 - fairCloud sensitive.. Daylight only.SWIR spectrometry. CH4 lines around 2.3 micrometers
ClO4 - fairCloud sensitive.. Daylight only.UV Spectrometry. ClO lines around 300 nm
Cloud cover3 - highDaylight only.VIS, NIR and SWIR spectroscopy
Cloud drop effective radius3 - highAt cloud top.. Daylight only.VIS, NIR and SWIR spectrometry
Cloud ice effective radius3 - highAt cloud top.. Daylight only.VIS, NIR and SWIR spectrometry
Cloud optical depth2 - very highLow-density cloud only.. Daylight only.VIS, NIR and SWIR spectrometry
Cloud top height4 - fairDaylight only.NIR spectrometry to estimate the total-column O2 above the cloud top as measured around 760 nm
CO4 - fairCloud sensitive.. Daylight only.SWIR spectrometry. CO lines around 2.3 micrometers
CO24 - fairCloud sensitive.. Coarse vertical resolution.. Daylight only.SWIR spectrometry. CO2 lines around 1.6 and 2.1 micrometers
Downward short-wave irradiance at Earth surface3 - highCloud sensitive.. Highly indirect.. Daylight only.VIS, NIR and SWIR spectrometry
H2O1 - primaryCloud sensitive.. Daylight only.Spectrometry in UV and VIS (several weak bands), and NIR and SWIR (strong bands around 940 nm and 1380 nm)
N2O4 - fairCloud sensitive.. Coarse vertical resolution.. Daylight only.SWIR spectrometry. N2O lines around 2.3 micrometers
NO4 - fairCloud sensitive.. Coarse vertical resolution.. Daylight only.UV spectrometry. NO lines around 250 nm
NO24 - fairCloud sensitive.. Coarse vertical resolution.. Daylight only.UV and VIS spectrometry. Several lines in the ranges around 220 nm and 400 nm
NO2 (Total column)4 - fairCloud sensitive.. Daylight only.UV and VIS spectrometry. Several NO2 lines
O32 - very highCloud sensitive.. Daylight only.UV and VIS spectrometry. Ozone lines in the bands around 260 nm (Hartley) and/or 340 nm (Huggins) and 600 nm (Chappuis)
O3 (Total column)1 - primaryCloud sensitive.. Daylight only.UV and VIS spectrometry. Ozone lines in the bands around 260 nm (Hartley) and/or 340 nm (Huggins) and 600 nm (Chappuis)
PSC occurrence3 - highCoarse vertical resolution.. Daylight only.UV and VIS spectrometry
Short-wave cloud reflectance5 - marginalNo specific limitation.VIS, NIR and SWIR spectrometry. Unsuitable dynamic range (saturation)
SO24 - fairCloud sensitive.. Coarse vertical resolution.. Daylight only.UV spectrometry. SO2 lines around 350 nm
SO2 (Total column)4 - fairCloud sensitive.. Daylight only.UV spectrometry. SO2 lines around 350 nm
Upward short-wave irradiance at TOA1 - primaryInformation on BRDF needed.UV, VIS, NIR and SWIR spectrometry
Upward spectral radiance at TOA2 - very highMissing all Long-waves.UV, VIS, NIR and SWIR spectrometry
Aerosol volcanic ash3 - highCloud sensitive.. Daylight only.UV (specifically sensitive to ash), VIS, NIR and SWIR spectrometry including the 760 nm band for high-level ash
Aerosol volcanic ash (Total column)2 - very highCloud sensitive.. Daylight only.UV (specifically sensitive to ash), VIS, NIR and SWIR spectrometry including the 760 nm band for high-level ashl