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New L2P and L3 at MF/CMS P.LeBorgne, F.Orain, A.Marsouin, H.Roquet MF/DP/CMS, Lannion.

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Presentation on theme: "New L2P and L3 at MF/CMS P.LeBorgne, F.Orain, A.Marsouin, H.Roquet MF/DP/CMS, Lannion."— Presentation transcript:

1 New L2P and L3 at MF/CMS P.LeBorgne, F.Orain, A.Marsouin, H.Roquet MF/DP/CMS, Lannion

2 New L2P L3 New L2P L3 in MERSEA From MERSEA to MyOcean

3 Next L2P 2009: hourly SEVIRI and GOES L2?P (at present internal to CMS/MERSEA) GRIDDED or not?

4 L3 at CMS: Present status in MERSEA Le Borgne et al, 2006, Mersea report Polar orbiters: -AATSR -NOAA-17 -NOAA-18 -AMSRE -TMI Geostationary: -GOES-E -SEVIRI Analysis (L4) Other users? Data available in real time through MERSEA (ftp IFREMER) Synthesis + Correction L3

5 Method (overview) Sensor i 1)Collection 2)Remapping 3)Synthesis over time 4)Correction Merging L3 (i), unique per sensor L3 (merged) Zone (Atl., global,..) + time window (1day, 3 days,…) Principles: -Synthesize information -Best quality -Traceability at pixel level: Origin (which sensor) Original lat lon Confidence level SSES Applied correction (if any)

6 Method : Correction 1) Sensor-AATSR Over the last ~10 days 2) Alalysis of the differences On a 5° grid 3) Interpolation To fine resolution: Correction of the day

7 Method : Merging A priori hierarchy of sensors traceability

8 L3: validation overview ……… L2PsAATSR L2PsBuoys..MSG L2PsNOAA-17 L2Ps AATSR L3Buoys L3NOAA-17 L3……… L3..MSG L3 UNCORRECTED Merged L3 AATSR L3Buoys L3NOAA-17 L3……… L3..MSG L3 CORRECTED validationcomparisoncorrectioncomparisoncontrolvalidation

9 L3: validation results over the Atlantic Validation Control Routine production since 01/01/07

10 L3: validation results Comparison with AVHRR18_G Inter Comparison of OSI-SAF products

11 L3: correction validation results SEVIRI-AATSR as a function of time and latitude before correction

12 L3: correction validation results SEVIRI-ATSR as a function of time and latitude after correction

13 From MERSEA … CMS MERSEA database –Available in real time trough the MERSEA ftp site at IFREMER –One year completed by March 2008, –Daily collated for: Polar orbiters: -AATSR -NOAA-17 -NOAA-18 -AMSRE -TMI Geostationary: -GOES-E -SEVIRI Buoys

14 …to Myocean MyOcean –Addition of METOP and MODIS SST –Collated down to 0.02 degree resolution –Over the European seas –For fine resolution analysis

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20 Conclusion Correction with AATSR shows satisfying results in MERSEA Limitations: –Cloud cover ? –Limited swath –Assumptions: large scale (several degrees)/ slowly varying (several days) errors: not right everywhere Do need R&D effort One full year database available next March MyOcean: prototype in construction


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