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GSICS-EP-08_Doc_05-01_CNES-ShortReport

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					        GSICS Executive Panel - 8th meeting

                                 CNES Highlights



                                                   Didier Renaut


GSICS EXP8 - Genève - 29-30 April, 2009                            1/ 1
                  1. Access to the SADE database for GSICS

1. It has been agreed (EXP-6) to transfer systematically SADE data onto a specific
CNES ”Export Web Site” open to GSICS members.

2. A first demonstration version of this “Export Web site” has been shown during the
GRWG-GDWG Toulouse meeting in February 2010.

3. Opening of the “Export Web Site” planned end-May 2010.

4. Content of the “Export Web Site”:
    - TOA calibrated reflectances on desertic sites for the GSICS community
      (currently 3 000 000 data ~ 10 % of SADE content)
    - Access with a user login
    - Updating every 6 months
    - Synthesis table
    - Sensors characteristics (in particular spectral responses).



     GSICS EXP8 - Genève - 29-30 April, 2009                                           2
              2. Upgrading the SADE database for GSICS

■ Adding new sites

 - 2 new sites for Asia have been chosen (Australia, China).
   Ongoing extraction of corresponding Parasol and SPOT/VGT data.

 - A new site for America not yet determined by NOAA.

■ Including GEO data

 - Transfer of MSG data from Eumetsat and insertion in SADE is ongoing.

 - CNES wishes to finish the transfer of MSG data and to experiment
   with them (cloud masks…) before working with other GSICS GEO data.



 GSICS EXP8 - Genève - 29-30 April, 2009                                  3
  3. Contribution to the GSICS work plan for solar channels


■ Several methods will be combined to monitor and
 intercalibrate GEO solar channels (see GRWG report)

■ CNES (P. Henry) is P.I. for two of them
 - Desert and bright land surfaces
 - Rayleigh scattering




  GSICS EXP8 - Genève - 29-30 April, 2009                     4
4. Contribution to the GSICS work plan for infrared channels
                            Regular AIRS-IASI intercomparison


■ CNES software for AIRS-IASI intercomparison (broadband channels, SNO
  with relaxed time collocation constraints) is implemented and currently
  under evaluation.

■ Other 2010 planned activities:

    Adaptation to the format of the new Eumetsat IASI Day-2 L1c data
     (release May 2010)

    Discussions and investigation of the CNES AIRS-IASI intercomparison results
     with LMD (performing another method with “companion channels”)




  GSICS EXP8 - Genève - 29-30 April, 2009                                          5
   5. A glance at the 2nd International IASI Conference
               Annecy, 25-29 January, 2010

                                          Conference organized by Cnes and Eumetsat.

                                          140 participants (France 46%, Germany 16%,
                                          USA 14%...), a very successful meeting
                                          with a lot of exciting new results:

                                          Atmospheric temperature and humidity,
                                          positive impact on NWP forecasting scores,
                                          maps of ammoniac, carbon monoxyde, ozone
                                          and dust, methane and CO2 climatology,…

                                          It has been also recalled that Met. agencies
                                          have chosen IASI as a reference for the
                                          calibration of satellite infrared sensors.

GSICS EXP8 - Genève - 29-30 April, 2009                                                  6
                                          Thank you




GSICS EXP8 - Genève - 29-30 April, 2009               7
          2. Contribution to the GSICS 2010 Operation plan
              Regular AIRS-IASI intercomparison: first conclusions


■ SNO provide a simple and accurate method to intercompare and evaluate
  IASI and AIRS, as well as other sensors (TANSO/Gosat, CrIs …)
    Limited to high latitudes
    However diversity of geophysical situations is sufficiently large to explore the
     dynamic range of the instrument

■ Other methods are available to access lower latitudes
    Double differences (IASI-ref(timeIASI) – (AIRS-ref(timeAIRS)
       Ref can be : radiative transfer or imager (GEO)

■ IASI continue to be very stable after 3.5 years in orbit
    Mean differences between AIRS and IASI are generally
     of a few 1/10th K or less.
    Radiometrically, there are no significant long-term changes in the SNO
     observed IASI-AIRS differences.


    GSICS EXP8 - Genève - 29-30 April, 2009                                             8
                                       1. Open specific CNES actions

                  Content of the SADE Export Web Site: deserts data

■ Systematic collect of satellite acquisitions on desertic sites:
     3 000 000 data ~ 10 % of SADE content


■ Operational monitoring of CNES sensors calibration (on a monthly basis) :
        SPOT(s)/High Resolution
        SPOT(s)/Vegetation-1&2
        PARASOL/Polder


■ Calibration monitoring and intercalibration of other sensors
  on a regular basis (through cooperation agreements with other space agencies)
        High resolution : Formosat-2 (Taiwan NSPO), Kompsat-2 (South Korea KARI)
        Coarse resolution : Envisat/MERIS (ESA), Aqua/MODIS (NASA)


        GSICS EXP8 - Genève - 29-30 April, 2009                                     9
                        SADE Export Web Site : deserts data




           ■ 20 sites selected over North Africa and Arabia
GSICS EXP8 - Genève - 29-30 April, 2009                       10
                     SADE Export Web Site : deserts data
                             ■ Desert Sites Database (from 1985 until 2010)
   NOAA09/AVHRR
   NOAA11/AVHRR
   NOAA14/AVHRR
  NOAA17/AVHRR3
  NOAA16/AVHRR3
                          AVHRR
  KOMPSAT2/MSC
  FORMOSAT2/RSI
      THEOS/TOP
   ADEOS/POLDER
  ADEOS2/POLDER
 PARASOL/POLDER
                         POLDER
      ERS2/ATSR2
      ERS2/GOME
  SeaStar/SeaWIFS
     SPOT1/HRV1
     SPOT2 HVR2
    SPOT4/HRVIR1
SPOT4/VEGETATION
SPOT5/VEGETATION
                              SPOT
      SPOT5/HRS
     SPOT5/HRG1
   ENVISAT/MERIS
   ENVISAT/AATSR
      TERRA/MISR
                             MERIS
    TERRA/MODIS
     AQUA/MODIS              MODIS
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GSICS EXP8 - Genève - 29-30 April, 2009                                       11
SADE Export Web Site, a few examples




GSICS EXP8 - Genève - 29-30 April, 2009   12/ 12
SADE Export Web Site, a few examples




GSICS EXP8 - Genève - 29-30 April, 2009   13/ 13
SADE Export Web Site, a few examples




GSICS EXP8 - Genève - 29-30 April, 2009   14/ 14
            2. Contribution to the GSICS 2010 Operation plan
                     Regular AIRS-IASI intercomparison: first results



■ Draws differences between IASI
 and AIRS pseudo-channels, vs
      time
      Brightness temp.
      Spatial dispersion
      etc.


■ On selected CNO (many criteria)
      Date
      Brightness temperature
      Spatial dispersion
      Sun viewing conditions
      Etc.



       GSICS EXP8 - Genève - 29-30 April, 2009                          15
                             Impact of filtering on scene uniformity




 Spatial dispersion < 1.5 K                       all CNO (no filtering)
GSICS EXP8 - Genève - 29-30 April, 2009                                    16
                       La 2e Conférence internationale IASI
                                  Rapide bilan
                           Quelques résultats notoires

                                 1. En prévision météo




            Tous les grands centres de prévision numérique utilisent IASI
            L’impact sur les prévisions est positif et significatif
            Beaucoup de progrès ont déjà été faits sur l’assimilation de IASI
            Beaucoup reste à faire (plus de canaux, plus de données, milieu
           nuageux…), de nombreux travaux sur l’assimilation sont en cours



GSICS EXP8 - Genève - 29-30 April, 2009                                          17
                       La 2e Conférence internationale IASI
                                  Rapide bilan
                           Quelques résultats notoires
                                2. En chimie de l’atmosphère




           Un exemple, la mesure du CO (Latmos-ULB)
           Ces produits CO de IASI sont assimilés de façon quasi-opérationnelle par le projet
          MACC (GMES Atmosphère) pour des prévisions chimiques des champs de CO.
GSICS EXP8 - Genève - 29-30 April, 2009                                                          18
                       La 2e Conférence internationale IASI
                                  Rapide bilan
                           Quelques résultats notoires
                                     3. Pour le climat




           Un exemple, le cycle saisonnier du CO2 dans les Tropiques : décalage temporel
          selon le type de mesure (propagation du CO2 des basses couches vers la
          stratosphère).
           IASI donne la colonne de CO2 dans la moyenne et haute troposphère
          (maximum de sensibilité à 13 km).
GSICS EXP8 - Genève - 29-30 April, 2009                                                     19
                       La 2e Conférence internationale IASI
                                  Rapide bilan
                          Un potentiel encore énorme…


- Météo : assimilation de plus de canaux, de plus de données, modèles régionaux
(débuts d’utilisation de IASI à Météo-France avec Arome)…
- Nouvelles espèces chimiques (ammoniac, acide nitrique, acide formique…)
- Climatologie (grâce à la très grande stabilité de IASI, CO2, CH4, nuages, aérosols…)
- IASI sur Metop-A sera suivi de IASI sur Metop-B et Metop-C (jusqu’en 2018-2020)
- Les « concurrents » américains vont s’arrêter bientôt (AIRS, Mopitt, TES) ou seront
moins performants, surtout pour la chimie (Cris)
- La relève et des performances encore supérieures après 2018 : IASI-NG.




GSICS EXP8 - Genève - 29-30 April, 2009                                                  20

				
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