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Sentinel-5 Precursor –
The first Copernicus Atmospheric
Composition Mission
Thorsten Fehr, EOP-GMQ
on behalf of the Sentinel-5 Precursor Project team
Sentinel-5 Precursor: Copernicus Themes
Stratospheric Ozone and
Surface UV Radiation
Air Quality
Climate Change
Source: DFD-DLR
Source: ibTImes
S5P, Copernicus Data Access Workshop, ESA/ESRIN, 20 April 2015
http://www.endangeredpolarbear.com
Sentinel-5 Precursor Copernicus
Requirements
• 
• 
Main drivers for operational space-borne atmospheric composition
observations:
• 
Facilitation and improvement of operational applications and
services on the atmospheric composition (e.g., Air Quality
model improvements, health warnings for public)
• 
Provision of information on treaty verification and protocol
monitoring (e.g., EU Directive and Regulations on Ambient Air
Quality and Pollutant Emissions, EU GHG emissions targets)
• 
Contribution to scientific understanding for environmental
assessments to support policies (e.g., IPCC, LRTAP)
Support the Copernicus Atmospheric Core and Downstream services
• 
-III, CAMS, C3S all led by ECMWF
S5P, Copernicus Data Access Workshop, ESA/ESRIN, 20 April 2015
Sentinel-5 Precursor:
Heritage and Future Missions
1995
2000
2010
2020
†
†
GOME
SCIAMACHY
???
Sentinel-4
Sentinel-5
2030
*
*
S5P, Copernicus Data Access Workshop, ESA/ESRIN, 20 April 2015
Sentinel-5 Precursor:
Heritage and Future Missions
1995
2000
2020
2010
†
†
Sentinel-5 Precursor
Sentinel-4
Sentinel-5
2030
GOME
SCIAMACHY
*
*
*
•  S5p is narrowing the gap between Envisat and Sentinel-5
•  Towards 40 years of similar atmospheric composition observations!
S5P, Copernicus Data Access Workshop, ESA/ESRIN, 20 April 2015
Sentinel-5 Precursor
•  The ESA Sentinel-5 Precursor (S5P) 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 S5P is Q2/2016 with 7 year design lifetime.
•  Background mission with global daily coverage.
TROPOMI
CONTRIBUTION TO Copernicus
‣ UV-VIS-NIR-SSWIR push-broom
‣ O3: total and tropospheric column,
‣ Spectral range: 270-500 nm,
‣ NO2: tropospheric and total column
‣ CO: total column
‣ SO2: total column
‣ CH4: total column
‣ Aerosol: absorbing index, type,
grating spectrometer.
675-775 nm, 2305-2385 nm
‣ Spectral Resolution: 0.25-1.1 nm
‣ Observation Mode: Nadir, global
daily coverage, ground pixel 7x7km2
at nadir
‣ Orbit: Sun synchronous, 824 km,
13:30 hr dayside equator crossing
time.
profile
optical depth
‣ H2O: tropospheric column
‣ H2O: total column
‣ BrO: total column
S5P, Copernicus Data Access Workshop, ESA/ESRIN, 20 April 2015
Instrument: TROPOMI Spatial Resolution
• 
High spatial resolution
Amsterdam
North Sea
The Hague
Utrecht
Rotterdam
Dordrecht
Breda
Source: KNMI S5P, Copernicus Data Access Workshop, ESA/ESRIN, 20 April 2015
S-5p and S-NPP Loose Formation Flight
• 
In par0cular Methane requires a very reliable cloud clearing of op0cally thin layers (e.g. cirrus) • 
Synergis0c use SNPP & S-­‐5p products improve the S5P only cloud informa0on • 
“Loose forma0on” with separa0on 5 min +/-­‐ 5 min • 
Rou0ne delivery of S-­‐NPP/VIIRS products to the S-­‐5p Ground Segment • 
Tailored VIIRS cloud products for S5P • 
Close coopera0on between ESA and NOAA/NASA on technical level S5P, Copernicus Data Access Workshop, ESA/ESRIN, 20 April 2015
Data Product
Vertical
Resolution
Accuracy
Precision
Ozone Profile
6 km
10-30%
10%
Total Ozone
total column
3.5-5%
1.6-2.5%
Tropospheric Ozone
trop column
Stratospheric NO2
strat column
<10%
0.5e15
Tropospheric NO2
trop column
25-50%
0.7e15
SO2 enhanced
total column
30%
0.15-0.3 (0.06-0.12) DU
Total SO2
total column
30-50%
1-3 (0.4-1.2) DU
Formaldehyde
Total HCHO
total column
40-80%
1.2e16 (4e15)
CO
Total CO
total column
15%
<10%
Methane
Total CH4
total column
1.5%
1%
Cloud Fraction
total column
<20%
0.05
Albedo (Optical Thickness)
total column
<20%
0.05 (10)
Cloud Height (Pressure)
total column
<20%
<0.5 km (<30hPa)
Aerosol Layer Height
total column
<100hPa
<50hPa
Aerosol Type
total column
~1 AAI
<0.1 AAI
Parameter
Ozone
NO2
SO2
Cloud
SNPP VIIRS Cloud data
Aerosol
S5P, Copernicus Data Access Workshop, ESA/ESRIN, 20 April 2015
Source: S5P Level 2 Working Group Level 2 Products and :
Expected Accuracy/Precision
Image credits:
Geert Vinken (TU/e) and Folkert Boersma (KNMI)
Example: NO2 from OMI
S5P, Copernicus Data Access Workshop, ESA/ESRIN, 20 April 2015
Data Timeliness
• 
Near-Realtime (NRT) Processing:
•  For time critical applications (e.g., forecasts, warnings)
•  Products available 3 hours after sensing
•  Products segmented in 5 minutes intervals
• 
Off-line Processing for Consolidated Products:
•  Best data available for non-time critical applications (e.g., science,
hind-cast analysis)
•  Typically after three days after sensing
•  One product per orbit
•  Level 1 data: use of consolidated calibration data
•  Level 2 data: Improved auxiliary information used and additional
products (CH4, tropospheric ozone)
• 
• 
Corrective Reprocessing
Full Mission Reprocessing
S5P, Copernicus Data Access Workshop, ESA/ESRIN, 20 April 2015
Data Access for Science Users
• 
Current Data Access Solutions
–  Copernicus Services
–  Privileged Access to the Level 2 NRT
–  CSCDA interface implemented in the PDGS
–  Science/other Users
–  Rolling Access to Latest Data via Sentinel Data Hub
–  Already operational for Sentinel-1
–  Level 1b Off-Line; Level 2 NRT and Off-line
–  Open and free to any users via self registration
S5P, Copernicus Data Access Workshop, ESA/ESRIN, 20 April 2015
Data Distribution
• 
Data Volume:
Product type
• 
GB per Orbit
GB per day
Level 2 NRT
4.27
60.6
Level 1b Radiance OFL
35.6
504
Level 1b Irradiances OFL
0.03
0.42
Level 2 OFL
5.24
74.3
Total
45.1
639
Data Organisation
• 
Level 1b radiance is provided as separate files for each of the 4 bands
• 
UV-UVIS-NIR and SWIR solar irradiance product
• 
Each geophysical Level 2 parameter is provided in a dedicated product
• 
Data format is netCDF-4 using Climate and Forecasting Metadata
Standards
S5P, Copernicus Data Access Workshop, ESA/ESRIN, 20 April 2015
S5P: Overall Project Status
•  S5P platform is in hibernation since December 2014
•  Ground Segment development on track, including processors, with
Overall Ground Segment Validation to start in April
•  Preparation for Flight Acceptance Review in February 2016
•  Launch window in Q2/2016 confirmed
•  TROPOMI instrument environmental testing
completed in 2014
•  Instrument calibration ongoing since
December 2014
•  Delivery foreseen in May 2015
•  Calibration Validation preparation ongoing with
S5PVT Meeting end September 2015
S5P, Copernicus Data Access Workshop, ESA/ESRIN, 20 April 2015
Thank you for your
attention!
S5P, Copernicus Data Access Workshop, ESA/ESRIN, 20 April 2015