1. ERS - ENVISAT SYMPOSIUM Gothenburg 16-20 October, 2000 MERIS Validation of MERIS Products Jean-Paul Huot, Carsten Brockmann Peter Regner, Phillipe Goryl Steven Delwart, Mike Rast

2. ERS - ENVISAT SYMPOSIUM Gothenburg 16-20 October, 2000 MERIS Responsibilities MERIS & AATSR VALIDATION TEAM (MAVT) Coordinator : E. Attema VEGETATION PRODUCTS & ATMOSPHERIC CORRECTIONS OVER LAND M. Rast L2 ALGORITHM VERIFICATION C. Brockmann CLOUDS & WATER VAPOUR PRODUCTS P. Goryl WATER PRODUCTS VALIDATION JP Huot

3. ERS - ENVISAT SYMPOSIUM Gothenburg 16-20 October, 2000 MERIS Level 2 Verification Objectives correct formatting algorithm correct surface classification products being in the expected range products in accordance with common rules no visual artefacts meaningful product confidence flags

4. ERS - ENVISAT SYMPOSIUM Gothenburg 16-20 October, 2000 MERIS L2 Verification General Strategy

5. ERS - ENVISAT SYMPOSIUM Gothenburg 16-20 October, 2000 MERIS BASED ON PROPOSALS IN ANSWER TO AO PRIVILEGE: EARLY ACCES TO MERIS PRODUCTS RESPONSABILITIES: GATHERING OF VALIDATION DATA CRITICAL REVIEW OF PRODUCTS Geophysical Validation

6. ERS - ENVISAT SYMPOSIUM Gothenburg 16-20 October, 2000 MERIS LAUNCH+/- 6 WEEKS: INTERCALIBRATION EXERCISE LAUNCH + 6 WEEKS: GATHERING OF VALIDATION DATA BEGINS LAUNCH + 3 MONTHS: RELEASE OF LEVEL 1B TO VALIDATION TEAMS LAUNCH + 4.5 MONTHS: RELEASE OF LEVEL2 TO VALIDATION TEAMS LAUNCH + 6 MONTHS: RELEASE OF ALL PRODUCTS TO SCIENCE TEAMS Schedule

7. ERS - ENVISAT SYMPOSIUM Gothenburg 16-20 October, 2000 MERIS MARINE PRODUCTS: 12 PROPOSALS LAND PRODUCTS: 4 PROPOSALS CLOUD AND WATER VAPOUR PRODUCTS: 3 PROPOSALS Overview

8. ERS - ENVISAT SYMPOSIUM Gothenburg 16-20 October, 2000 MERIS ALGAL PIGMENT ** YELLOW SUBSTANCE ** SUSPENDED MATTER ** AEROSOL OPTICAL THICKNESS * AEROSOL SPECTRAL DEPENDANCE * FLAGS ** WATER-LEAVING REFLECTANCES * * REFERENCE MODEL EXISTS ** REFERENCE MODEL AND MEASUREMENT PROTOCOLS EXIST Marine Products

9. ERS - ENVISAT SYMPOSIUM Gothenburg 16-20 October, 2000 MERIS INTERCALIBRATION OF OPTICAL SENSORS INTERVALIDATION OF MEASUREMENT METHODS. THE INVESTIGATORS AGREE TO TAKE PART IN AGREE TO FOLLOW MEASUREMENT PROTOCOLS REFERENCE MODEL Marine Products

10. ERS - ENVISAT SYMPOSIUM Gothenburg 16-20 October, 2000 MERIS Marine Products

11. ERS - ENVISAT SYMPOSIUM Gothenburg 16-20 October, 2000 MERIS

12. ERS - ENVISAT SYMPOSIUM Gothenburg 16-20 October, 2000 MERIS VALIDABLE PRODUCTS: SURFACE PRESSURE DDV FLAG AEROSOL OPTICAL THICKNESS ABOVE DDV AEROSOL SPECTRAL SLOPE ABOVE DDV Land Products

13. ERS - ENVISAT SYMPOSIUM Gothenburg 16-20 October, 2000 MERIS VALIDATION OF SURFACE PRESSURE: Pressure algorithm uses ratio of radiance in O2 absorption band at 760 nm and reference at 753.75 nm => sensitivity to spectral registration VALIDATION ABOVE BRIGHT DESERT SITES WITH KNOWN SURFACE PRESSURE Land Products

14. ERS - ENVISAT SYMPOSIUM Gothenburg 16-20 October, 2000 MERIS VALIDATION OF AEROSOL PROPERTIES: Use data from AERONET network and from SCHIAMACHY VALIDATION OF DDV CLASSIFICATION: Stability of statistics of DDV patches with variation of ARVI threshold Land Products

15. ERS - ENVISAT SYMPOSIUM Gothenburg 16-20 October, 2000 MERIS WATER VAPOUR OVER WATER: MWR on board ENVISAT WATER VAPOUR OVER LAND AND CLOUDS: GPS, radiosoundings Water Vapour Products

16. ERS - ENVISAT SYMPOSIUM Gothenburg 16-20 October, 2000 MERIS CLOUD OPTICAL THICKNESS: Validate radiative transfer code using : Measurement from aircraft of top-of-cloud radiances with CASI with MERIS band configuration. Measurement of in-situ cloud droplet sizes and concentrations using in-cloud flying aircraft Cloud Products

17. ERS - ENVISAT SYMPOSIUM Gothenburg 16-20 October, 2000 MERIS CLOUD TOP PRESSURE Dedicated MERIS campaigns with reference bands outside O2 absorption bands (753.75 nm, 775 nm) and three 2.5 nm-wide channels at 760, 762.5, 765 nm. Dedicated aircraft flights with OVID spectrometer and CASI imaging spectrometer. Cloud Products