Sentinel-3 Future Products Overview - EUMETCast User Forum 2014

EUMETCast User Forum: Future Satellite Services

François Montagner

EUM/OPS/VWG/14/772637

17 September 2014

Future Satellite Services

• Copernicus Sentinel-3 Products Overview

• Copernicus Sentinel-3 Products Dissemination


17 September 2014

Sentinel-3 Satellite and Payload

• SLSTR: Sea and Land Surface Temperature Radiometer

• SRAL: Synthetic Aperture Radar Altimeter

• OLCI: Ocean and Land Colour Instrument

• MWR: Micro-Wave Radiometer

• LRR: Laser Retro-Reflector

• DORIS: Doppler Orbitography and Radiopositionning Integrated by Satellite

• STM: Surface Topography Mission = SRAL + MWR


17 September 2014

Sentinel-3 Marine product contents

Level 2 OLCI:• Normalised water surface reflectance

• Algal pigment concentration for open and

for coastal waters

• Total suspended matter concentration

• Diffuse attenuation coefficient

• Coloured dissolved matter absorption

• Photosynthetically active radiation

• Integrated water vapour

• Aerosol optical depth

• Aerosol Angström exponent

Level 2 SLTSR:• Sea surface temperature

(L2P GHRSST standard)

Level 2 SRAL:• Sea/coastal zone surface height

• Significant wave height

• Wind speed

• Backscatter coefficient s0

• Sea ice height, freeboard

• Total water, liquid water (from MWR)

Level 1B: SLTSR (radiance, BT at TOA) and OLCI (radiance at TOA) and

SRAL(waveforms)

(ESA and EUMETSAT)


17 September 2014

Sentinel-3 Land / Sea masks (1/2)

Land/sea masks apply to Level 2 products only. Level 1 products make no

distinction, and provide the mask as annotation data.

Optical products (OLCI, SLSTR, Synergy): land and water masks are fully complementary

and do not overlap. Major lakes are flagged as “sea”.OLCI Level 2 Products: The Land and Water split

Examples extracted by a simulation of 3 minutes frame for OLCI Level 2 Full Resolution products

MarineLand OL_2_LFR OL_2_WFR

Water is masked in blue, no values are provided for these pixels.

Land is masked in grey, no values are provided for these pixels

Example of geophysical product:OLCI Terrestrial Chlorophyll Index (OTCI)

Example of geophysical product:Chlorophyll Concentration for open ocean waters (CHL_OC4ME)

The Land and Water masks are perfectly complementary.

The cloud mask is also provided in white for a better interpretation of the information.


17 September 2014

Sentinel-3 Land / Sea masks (2/2)

Altimetry products (SRAL): masks do overlap inside and outside the coastline.

SRAL Subsatellite Track

SRAL Level 2 Marine Products will contain

information sensed over the white area (Open

Ocean and Sea-Ice) and the green area (Coastal

zones and part of the land within a certain

distance from the coastline)

SRAL Level 2 Marine and Land Products are split according to the figure below

SRAL Level 2 Land Products will contain

information sensed over the black area (Land)

and the green area (Coastal zones and part of

the land within a certain distance from the

coastline)

Coastal Area (up to 300km from the

coastline) and part of the Land (few

km from the coastline)

Land Area: including

rivers and Lakes

Open Ocean

Both Products will contain the measurements over the coastal areas

(up to 300 Km offshore) and part of the Land within a few km from the

coastline


17 September 2014

Sentinel-3 Marine optical product characteristics

Product Spatial res. (m)

Swath width (km)

Accuracy Size +

(GB/rev)

OLCI L1 EFR 300 1270 TOAR: 2% 21.47

OLCI L1 ERR 1200 Idem Idem 1.76

OLCI L2 WFR 300 Idem Reflectance: 5%@400nmAlgal pigment: 30%

(ocean)

14.19

OLCI L2 WRR 1200 Idem Idem 1.19

SLSTR L1B 500 (vis/NIR), 1000 (TIR)

740 (dual view)1400 (nadir)

<5% (vis/NIR TOAR)0.2K (TIR BT)

18.56

SLSTR L2 WST 1000 740 0.3K 0.74

+ based on estimated compression factor

Product resolution, swath width and accuracy are the required values as per e.g. “Sentinel-3 ESA’s Global Land and Ocean Mission for

GMES Operational Services”, ESA SP-1322/3


17 September 2014

Sentinel-3 Marine altimetry product characteristics

Product Sampling Accuracy Size (GB/rev)

SRAL L1B Waveform rate : 20 Hz 0.75

SRAL L2 WAT Reduced (or LRM) : 1 HzStandard : 1 Hz, 20 Hz

Extended: 20 Hz + waveforms

SSH: 10 cm (NRT), 3.5cm (STC)SWH: 4% (NRT), 1% (STC)

Wind: 2 m.s-1 (NRT), 1.5m.s-1 (STC)

0.20

Product resolution, swath width and accuracy are the required values as per e.g. “Sentinel-3 ESA’s Global Land and Ocean Mission for

GMES Operational Services”, ESA SP-1322/3


17 September 2014

Sentinel-3 Product Formats

• The Sentinel-3 Products are organised in packages, using a

restriction of the CCSDS XML Formatted Data Unit (XFDU)

specific for the Sentinel-3 mission.

XML format

NetCDF-4 format


17 September 2014

Sentinel-3 Products Timeliness

NRT products

STC products

NTC products

NTC products

Reprocessing Campaign

NRT: Near Real time

STC: Short Time Critical

NTC: Non time Critical

Weather and ocean forecasting,

sea state forecasting

Operational ocean

monitoring and forecasting

Climate monitoring

Oceanography

time

3 h 48 h 30 d ~1/2 y

Climatology

Data exploitation for

science


17 September 2014

Sentinel-3 Marine PDGS context

Online Rolling Data Archive

(ODA/ORA): Supports

ftp/http access to level 1&2

PDUs over the Internet

Terrestrial EUMETCast

considered in addition

Product Dissemination Units (PDUs) apply to both EUMETCast and ODA/ORAdissemination


17 September 2014

Sentinel-3 Marine Product Dissemination Baseline (1/2)

Product EUMET-Cast

ODA/ORA Data Centre

Timeliness Resol. Rate (Mbps)*

OLCI L1 EFR NRT full 29.02

OLCI L1 EFR NTC full

OLCI L1 ERR NRT red. 2.38

OLCI L1 ERR NTC red.

OLCI L2 WFR NRT, NTC full

OLCI L2 WRR NRT red. 1.60

OLCI L2 WRR NTC red.

SLSTR L1B NRT, NTC full

SLSTR L2 WST NRT full 1.00

SLSTR L2 WST NTC full

* EUMETCast only


17 September 2014

Sentinel-3 Marine Product Dissemination Baseline (2/2)

Product EUMETCast ODA/ORA Data Centre

Timeliness Resol. Rate (Mbps)*

SRAL L1A+ STC, NTC full

SRAL L1B NRT, STC full 1.01 + 1.01

SRAL L1B NTC full

SRAL L1BS+ STC, NTC full

SRAL L2 WAT NRT, STC full 0.83 + 0.83

SRAL L2 WAT NTC full

+ Day 2 evolution

* EUMETCast only


17 September 2014

Sentinel-3 Services Ramp-up Schedule

Similarly, data access is

gradually open to all

users from early stages

of mission

S-3A commissioning phase: Launch + 5 months

Milestone 1: Spacecraft IOCR (S-3A Launch + 5 months)

Milestone 2: PDGS commissioning review (S-3A Launch + TBD months)

Milestone 3: routine operations review

Data provision mainly to Sentinel-3 calibration validation team as and when ready. Test technical interfaces for data provision to Copernicus core services.

Start gradual data provision to Copernicus core services and collaborative ground segment (national mirror sites).

Full data provision to Copernicus core services and collaborative ground segment (national mirror sites). Gradual data provision to scientific and other users.

Full data provision to all users.

S-3A spacecraftcommissioning S-3A ramp-up: operational qualification

S-3A routine operations

S-3Alaunch

M1: S-3A IOCR

M2: S-3A Commissioning review

M3: S-3A Routine ops review

Subsets of L0, L1, L2 to S-3 cal & val team

Official release of Level 1

User data products aregradually qualified andoperationally certified

Science

Sentinel-3 Future Products Overview - EUMETCast User Forum 2014