WMO OSCAR | Details for Instrument TROPOMI

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Instrument: 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 to 2027
Last update:	2021-12-13

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

Sentinel-5 precursor (ESA)
- Sentinel-5P (see instrument status) Jan 2018 - 2027

Instrument classification

Earth observation instrument
Passive optical radiometer or spectrometer
Cross-nadir shortwave (UV/VIS) sounder

WIGOS Subcomponents

Subcomponent 1
UV/VIS/NIR sounders, nadir and limb
UV/VIS/NIR nadir sounder
Subcomponent 2
NIR/SWIR imaging spectroscopy
NIR/SWIR imaging spectrometer
Subcomponent 3
NIR spectrometer
NIR spectrometer

Mission objectives

Primary mission objectives

BrO
CH4 mole fraction
CO
ClO
H2O
HCHO
HCHO Total Column
N2O mole fraction
NO
NO2
NO2 Total Column
O3
O3 Total Column
SO2
SO2 Total Column

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
Note: * Primary mission objective.

Search:

Variable	Relevance for measuring this variable	Operational limitations	Explanation
BrO*	1 - primary	Cloud sensitive.. Daylight only.	UV spectrometry. BrO lines around 300 nm
ClO*	1 - primary	Cloud sensitive.. Daylight only.	UV Spectrometry. ClO lines around 300 nm
Downward short-wave irradiance at Earth surface	1 - primary	Cloud sensitive.. Highly indirect.. Daylight only.	VIS, NIR and SWIR spectrometry
Aerosol column burden	2 - very high	Cloud sensitive.. Daylight only.	UV (for absorbing aerosol), VIS, NIR and SWIR spectrometry including the 760 nm band for high-level aerosol
Aerosol effective radius	2 - very high	Cloud sensitive.. Daylight only.	UV, VIS, NIR (including the 760 nm band for high-level aerosol) and SWIR spectrometry
Aerosol mass mixing ratio	2 - very high	Cloud sensitive.. Daylight only.	UV (for absorbing aerosol), VIS, NIR (including the 760 nm band for high-level aerosol) and SWIR spectrometry
Aerosol Optical Depth	2 - very high	Cloud sensitive.. Daylight only.	UV, VIS, NIR and SWIR spectrometry including the 760 nm band for high-level aerosol
Aerosol type	2 - very high	Cloud sensitive.. Daylight only.	UV (for absorbing aerosol), VIS, NIR and SWIR spectrometry including the 760 nm band for high-level aerosol
HCHO*	2 - very high	Cloud sensitive.. Coarse vertical resolution.. Daylight only.	UV spectrometry. HCHO lines around 350 nm
HCHO Total Column*	2 - very high	Cloud sensitive.. Daylight only.	UV spectrometry. HCHO lines around 350 nm
Cloud optical depth	2 - very high	Low-density cloud only.. Daylight only.	VIS, NIR and SWIR spectrometry
NO*	2 - very high	Cloud sensitive.. Coarse vertical resolution.. Daylight only.	UV spectrometry. NO lines around 250 nm
NO2*	2 - very high	Cloud sensitive.. Coarse vertical resolution.. Daylight only.	UV and VIS spectrometry. Several lines in the ranges around 220 nm and 400 nm
NO2 Total Column*	2 - very high	Cloud sensitive.. Daylight only.	UV and VIS spectrometry. Several NO2 lines
O3*	2 - very high	Cloud 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*	2 - very high	Cloud 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 occurrence	2 - very high	Coarse vertical resolution.. Daylight only.	UV and VIS spectrometry
SO2*	2 - very high	Cloud sensitive.. Coarse vertical resolution.. Daylight only.	UV spectrometry. SO2 lines around 350 nm
Aerosol volcanic ash	2 - very high	Cloud 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 high	Cloud sensitive.. Daylight only.	UV (specifically sensitive to ash), VIS, NIR and SWIR spectrometry including the 760 nm band for high-level ashl
CH4 mole fraction*	3 - high	Cloud sensitive.. Daylight only.	SWIR spectrometry. CH4 lines around 2.3 micrometers
CO*	3 - high	Cloud sensitive.. Daylight only.	SWIR spectrometry. CO lines around 2.3 micrometers
H2O*	3 - high	Cloud sensitive.. Daylight only.	Spectrometry in UV and VIS (several weak bands), and NIR and SWIR (strong bands around 940 nm and 1380 nm)
N2O mole fraction*	3 - high	Cloud sensitive.. Coarse vertical resolution.. Daylight only.	SWIR spectrometry. N2O lines around 2.3 micrometers
Short-wave cloud reflectance	3 - high	No specific limitation.	VIS, NIR and SWIR spectrometry. Unsuitable dynamic range (saturation)
SO2 Total Column*	3 - high	Cloud sensitive.. Daylight only.	UV spectrometry. SO2 lines around 350 nm
Upward short-wave irradiance at TOA	3 - high	Information on BRDF needed.	UV, VIS, NIR and SWIR spectrometry
Cloud cover	4 - fair	Daylight only.	VIS, NIR and SWIR spectroscopy
Cloud drop effective radius	4 - fair	At cloud top.. Daylight only.	VIS, NIR and SWIR spectrometry
Cloud ice effective radius	4 - fair	At cloud top.. Daylight only.	VIS, NIR and SWIR spectrometry
Cloud top height	4 - fair	Daylight only.	NIR spectrometry to estimate the total-column O2 above the cloud top as measured around 760 nm
Upward spectral radiance at TOA	4 - fair	Missing all Long-waves.	UV, VIS, NIR and SWIR spectrometry

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