StatusS5p TROPOMI

Pepijn Veefkind

Sentinel 5 precursorCOPERNICUS ATMOSPHERE MISSION IN POLAR ORBIT

• The ESA Sentinel-5 Precursor (S-5P) is a pre-operational mission focussing on global observations of the atmospheric composition for air quality and climate.

• The TROPOspheric Monitoring Instrument (TROPOMI) is the payload of the S-5P mission and is jointly developed by The Netherlands and ESA.

• The planned launch date for S-5P is 2016 with a 7 year design lifetime.

‣UV-VIS-NIR-SWIR nadir view grating spectrometer.

‣Spectral range: 270-500, 675-775, 2305-2385 nm

‣Spectral Resolution: 0.25-1.1 nm

‣Spatial Resolution: 7x7km2

‣Global daily coverage at 13:30 local solar time.

TROPOMI

‣Total columnO3, NO2, CO, SO2,CH4, CH2O,H2O,BrO

‣Tropospheric columnO3, NO2

‣O3 profile

‣Aerosol absorbing index & layer height

Contribution to Copernicus

TROPOMI in the CEOS AQ Constellation• Covering the spatial regions that are not covered by

the GEO’s• Add products, e.g. CO, CH4, Aerosol layer height,

aerosol profile.• Act as a “travelling standard” between the GEOs• S5P – SNPP constellation

• Project Organization• Instrument• Level 0-1B• Level 1-2• On-ground Calibration• Validation

Instrumentprime Airbus DS NL

CalibrationKNMI / SRON

Airbus DS NL / TNO

Level 0-1BKNMI

Level 1-2KNMI, SRON, DLR, IUP-Bremen

BIRA-IASB, MPI Mainz, RAL

OperationsKNMI, ESOC

Ground SegmentDLR, KNMI

ValidationESA, KNMI, SRON, ...

Prin

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Project Man.JPT (ESA-NSO)

SWIR module

UVN module

CAL unit

Telescope

UVN DEMs

SWIR DEM

Performance Overview

UV UVIS NIR

Level 0-1B Processor• Multi-threading• Multi-pass• Algorithms are pluggable at run-time• Full error propagation (noise + systematic errors)• L1B product ~25 Gbyte / 100 min• S/W design can be re-used

GOME-SCIAMACHY-OMI

PR

OTO

TYPE

TROPOMIL2 PRODUCTS

OPER

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NA

L SW

VER

IFIC

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L2 Working Group

KNMI | DLR | IUP-Bremen | BIRA | SRON | MPIC | RAL

TROPOMI Data ProductsProduct Accuracy :: Precision

Ozonetotal columnprofile (incl. troposphere)trop. column

3.5-5% :: 1.6-2.5%10-30% :: 10%TBD :: TBD

NO2

total columntrop. column

10-25% :: 1·1015 mol/cm2

25-50% :: 7·1014 mol/cm2

COtotal column 15% :: 10%

CH4

total column 1.5% :: 1%

SO2

volcanic plumetop. column

TBC :: 1-3 DU30-50% :: 1-3 DU

AerosolAAIaerosol layer height*aerosol optical thicknesssingle scattering albedo

<1 AAI :: 0.1 AAI1 km :: 0.5 km0.1 (20%) :: 0.05 (10%)0.05 :: 0.01

CloudfractionpressurealbedoRegridded NPP- VIIRS

20% :: 0.0520% :: 30 hPa20% :: 0.05

Product Accuracy :: Precision

CH2Ototal column 40-80% :: 1.2·1016 mol/cm2

CHO-CHOtotal column TBD

BrOtotal column TBD

HDOtotal column TBD

H2Ototal column 20% :: 10%

OClOtotal column TBD

UVsurface flux 10% :: 5%

Surface Reflectancemonthly climatology 3% :: 1%

The operational data products will be developed by a collaboration of European

institutes.KNMI/DLR-IMF/IUP/BIRA-IASB/SRON/MPIC/RAL/FMI

On-ground Calibration• All measurements done in vacuum.• Automated processing system for quick-look and key

data analysis, using L0-1B processor.• Calibration period of 125 days of continuous

measurements.• Strong involvement of KNMI/SRON:– On-site science support team– Data analysis team

Optical Stimulus Calibration Key Data E / S

Star stimulus Geolocation ELasers (UVN/SWIR) ISRF, Stray light E + S

Echelle grating stimulus UVN ISRF E + S

Spectral filters Stray light E

Spectral Line Lamps Spectral calibration E + S

FEL lamp + diffuser Absolute radiometric calibration E + S

Black bodies Absolute radiometric calibration E + S

Integrating Sphere Relative radiometry, BSDF E + S

Sun simulator Relative radiometry, BSDF E + S

Internal LEDs Detector parameters n/a

Internal WLS Relative radiometry n/a

Internal laser diodes ISRF n/a

Geophysical Validation

• 2014: ESA AO• 2015: ESA Validation Workshop

• 2014: AROMAT campaign, Romania• 2015: AROMAT-II campaign, Romania• 2016: Max-DOAS comparison

campaign, NL• 2017: ESA Campaign• 2018: Cabauw Cloud campaign, NL

Summary & Outlook

• TROPOMI will be a major step forward for atmospheric composition observations due to improved spatial resolution & sensitivity.

• TROPOMI will address important societal challenges: air quality, climate change, ozone layer.

• The on-ground calibration has been finalized, analysis ongoing.

• We are counting down for a launch in 2016!

veefkind@knmi.nl

www.tropomi.nl

www.tropomi.eu

sentinel.esa.int/s5p