1. Status S5p TROPOMI
Pepijn Veefkind

2. Sentinel 5 precursor COPERNICUS 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: , , nm
Spectral Resolution: nm
Spatial Resolution: 7x7km2
Global daily coverage at 13:30 local solar time.
TROPOMI
Contribution to Copernicus
Total column O3, NO2, CO, SO2,CH4, CH2O,H2O,BrO
Tropospheric column O3, NO2
O3 profile
Aerosol absorbing index & layer height

3. 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

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

5. Principal Investigator
Project Man.
JPT (ESA-NSO)
Instrument
prime Airbus DS NL
Calibration
KNMI / SRON
Airbus DS NL / TNO
Level 0-1B
KNMI
Level 1-2
KNMI, SRON, DLR, IUP-Bremen BIRA-IASB, MPI Mainz, RAL
Operations
KNMI, ESOC
Ground Segment
DLR, KNMI
Validation
ESA, KNMI, SRON, ...
Principal Investigator
KNMI (PI), SRON (co-PI)

6. UVN module
SWIR module

7. Telescope
CAL unit

8. UVN DEMs
SWIR DEM

9. Performance Overview UV
UVIS
NIR

10. 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

11. KNMI | DLR | IUP-Bremen | BIRA | SRON | MPIC | RAL
GOME-SCIAMACHY-OMI
PROTOTYPE
TROPOMI L2 PRODUCTS
OPERATIONAL SW
VERIFICATION
L2 Working Group
KNMI | DLR | IUP-Bremen | BIRA | SRON | MPIC | RAL

12. TROPOMI Data Products Product Accuracy :: Precision Ozone total column
profile (incl. troposphere)
trop. column
TBD :: TBD
NO2
10-25% :: 1·1015 mol/cm2
25-50% :: 7·1014 mol/cm2 CO
15% :: 10%
CH4
1.5% :: 1%
SO2
volcanic plume
top. column
30-50% :: 1-3 DU
Aerosol
AAI
aerosol layer height*
aerosol optical thickness
single scattering albedo
<1 AAI :: 0.1 AAI
1 km :: 0.5 km
0.1 (20%) :: 0.05 (10%)0.05 :: 0.01
Cloud
fraction
pressure
albedo
Regridded NPP- VIIRS
20% :: 0.05
Product
Accuracy :: Precision
CH2O
total column
40-80% :: 1.2·1016 mol/cm2
CHO-CHO
TBD
BrO
HDO
H2O
20% :: 10%
OClO UV
surface flux
10% :: 5%
Surface Reflectance
monthly 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

13. 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

14. Optical Stimulus
Calibration Key Data
E / S
Star stimulus
Geolocation E
Lasers (UVN/SWIR)
ISRF, Stray light
E + S
Echelle grating stimulus
UVN ISRF
Spectral filters
Stray light
Spectral Line Lamps
Spectral calibration
FEL lamp + diffuser
Absolute radiometric calibration
Black bodies
Integrating Sphere
Relative radiometry, BSDF
Sun simulator
Internal LEDs
Detector parameters
n/a
Internal WLS
Relative radiometry
Internal laser diodes
ISRF

15. 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

16. 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!
sentinel.esa.int/s5p