1. Altimeter and scatterometer seminar SMHI, March 2012 Future of satellite altimeters Sentinel-3 and SWOT Julia Figa Saldaña With contributions from Sentinel-3 team at EUMETSAT

2. Altimeter and scatterometer seminar SMHI, March 2012 SENTINEL SERIES: Sentinel-3 The Sentinels Series: Operational satellites to meet the Earth Observation needs of the Global Monitoring for Environment and Security (GMES) programme. Sentinel-1: C-band SAR Sentinel-2: Superspectral (Land) Sentinel-3: Ocean Sentinel-4/-5: Atmospheric Chemistry The pair of Sentinel-3 satellites will provide global, frequent and near-real time ocean, ice and land monitoring. GMES/ESA programme, with EUMETSAT participation in satellite operations and marine product services Sentinel-3

3. Altimeter and scatterometer seminar SMHI, March 2012 Sentinel-3: Key Payload SLSTR: Sea and Land Surface Temperature Radiometer SRAL: Synthetic Aperture Radar Altimeter OLCI: Ocean and Land Colour Instrument MWR: MicroWave Radiometer LRR: Laser Retro-Reflector Launch Configuration

4. Altimeter and scatterometer seminar SMHI, March 2012 Sentinel-3 Product Priorities Ocean: – Sea-Surface Temperature – Sea Surface Topography – Ocean Colour Land: – Land Surface Temperature – Land Surface Biophysical Properties Products processed in Near Real Time by EUMETSAT

5. Altimeter and scatterometer seminar SMHI, March 2012 Instruments and Ocean Products SLSTR: (ENVISAT AATSR Follow-on) SRAL: (CRYOSAT based) MWR: MicroWave Radiometer LRR : Laser Retro-Reflector OLCI: (MERIS Follow-on) Sea Surface Temperature: (SST) Altimeter products: Sea Surface Height, (SSH), Sea Ice (SI) Significant Wave Height (SWH) Surface Wind Speed (SWS) Altimetry support: (ionosphere, troposhere corrections, Precise Orbit Determination) Ocean Colour: ocean Chlorophyll (Chl), yellow substance (YS) Suspended Sediment,

6. Altimeter and scatterometer seminar SMHI, March 2012 OLCI/SLTSR and synergy product list LevelDescription 1Full Resolution top of atmosphere 2Full Resolution Water & atmosphere parameters 2Full Resolution Land and Atmosphere parameters 1Reduced Resolution top of atmosphere 2 Reduced Resolution Water & atmosphere parameters 2 Reduced Resoslution Land and Atmosphere parameters LevelDescription 1Brightness temperatures and radiances 2Level 2P Sea Surface Temperature (GHRSST like) 2Land Surface Temperature Parameters LevelDescription 2 Surface Reflectances and Aerosol parameters over Land 2 1 km VEGETATION Like product (~VGT-P) - TOA Reflectances 2 1 km VEGETATION Like product (~VGT-S1) 1day synthesys surface reflectances and NDVI 2 1 km VEGETATION Like product (~VGT-S10) 10days synthesys surface reflectances and NDVI

7. Altimeter and scatterometer seminar SMHI, March 2012 SRAL product list LevelDescription 2 1-Hz and 20-Hz Ku and C bands parameters (LRM/SAR), waveforms. Over Land 2 1-Hz and 20-Hz Ku and C bands parameters (LRM/SAR), waveforms. Over Water LRM – Low resolution mode: default operation mode in open ocean SAR – Synthetic Aperture Radar mode: default operation mode over land and in ocean coastal areas

8. Altimeter and scatterometer seminar SMHI, March 2012 SWOT – CNES/NASA Surface Water hydrology and Ocean surface Topography mission Mission objective: to measure water level (and its space-time variation) of rivers, lakes and flooded zones as well as oceans. In order to overcome the main limitation of current altimetry (along-track low resolution data), the interferometric altimetry will enable to give a bi- dimentional image with an horizontal resolution of about 50-100 m. This technique also enables to overcome some limitations of conventional altimetry over land, i.e., the interference reflections problems due to dry grounds, the vegetation and the relief. Source http://smsc.cnes.fr/SWOT

9. Altimeter and scatterometer seminar SMHI, March 2012 SWOT – CNES/NASA KaRIN includes two SAR antenna in Ka band at the end of 10 meters boom providing a ground track of 120 km large. It will include as well conventional nadir altimeter measurements With its large swath, SWOT satellite will cover all the lakes, rivers, reservoirs and oceans of the Earth, at least twice every 21 days. Source http://smsc.cnes.fr/SWOT