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Paramètres de surface océaniquepar télédétectionOceanic surface parametersby remote sensing
Dominique DAGORNE – IRD – Centre de Bretagne – US025
Aim :For the « final » users, collection of the main products ofoceanic surface parametersobtained byremote sensing-productsSST , SSR (« color ») , « wind », « topography» (futur (2008 ?) : Salinity)-delivery: Delayed Time : DT (historical) /Near Real Time : NRT (operationnal ?)-spatio - temporal scaleat the best «résolution » (?)hourly - daily – weekly – monthly - … climatologylocal – regional – globalstudies areas:ocean east boundary systems (Upwelling)Equatorial Atlantic (EGEE/AMMA)others requirements : Pacific , Indien, mediterranean,..
USINGObservationtemporal analysis of parameters : values, anomalies, indexes, ( ex CUI)temporal plot , transect space – time (hovmoller): advanced data analysis : EOF, wavelet,..ModelisationValidation : sparse in-situ data (ship, buoys,..)Forcing parameters : monthly climatologies , 8 days SST, daily wind,..Derived productsothers « satellite » products of interest : radiative fluxes, clouds , aerosols, ..Turbulent fluxes (latent – sensible) and net balance

SOME DEFINITIONSSatelliteDATAandPRODUCTS:level 0: « raw » satellite measurement obtained in « direct read out » receiving stationlevel 1: L0 démultiplexed (DN) radiance + parameters : calibration, navigation, time,..level 2: calibrated data « Top Of Atmosphere »reflectance (VIS, NIR) – brighness temperature (Tb) (IR, MW)(geo)localisation - « cloud mask »level 3: surface (or atmospheric) geophysical parametersobtained by (complex) modelisation of satellite data .( direct-inverse problems - others data : meteorological )- atmospherics effects ( angles , water vapour, .. )- primary products : ex : SST , Nlwr i,..- surface effects ( marine optics , emissivity, rugosity,..)- secondary products : ex : « color» ( CHLa, PAR,..), wind, ..« instantaneous » cartographic restitutionlevel 4/5: level 3 multitemporal composite (synthesis) by (M)hours, (N) days , week, monthex :dailyMean Wind Field , 3 days SST , Weekly CHLa« synthesis » products obtained by merging and interpolationex : global interpolated SST, Primary Production (CHL,SST, PAR,..)
CONSTRAINT (1)Physics of measurementRemote sensing : long distance electromagnetic spectrum observationofearth - atmosphere systemby a couplevector-sensor
Depending ofcollector (telescope-antenna)detector (Signal / Noise )spectrum (width,window, absorption, diffusion,..)instant (Day/Night, viewing - solar angles,..)atmosphere : Temperature, Humidity,CLOUDS ,aerosols, ozone, rare gassurface : reflectance , emissivity, temperature,..direct communication – on-board recording
Passivesurface observation domain : window channels (radiometer)-« refectivity »:0.4 -4 mu : Visible – Near Infra-Red VIS/NIR (0.5 – 1.2, 1.6 mu)Mean Infra-Red MIR ( 3.6 mu)- «emissivity »: 3-15 mu : Thermic Infra-Red TIR ( 10-12 mu) Micro-Wave MW ( 10 – 21 – 37 - 85 – 150 Ghz)Active: radar micro-wave (scaterrometer, altimeter)
CONSTRAINT (2)Sensor(s) – Vector systemOrbit satellite:- polar heliosynchronous ( ~ 800 km) – equatorial2 pass by day : ASCending/DEScending orbits (latitude effect)- geosynchronous (~ 36000 km) : fixed earth observationSensor:optical (VIS-NIR, TIR) : nadir scanningwide viewing fields for global environnement( # narrow viewing for earth observation )antenna ( passif MW ) : lobe – conical scanningDétector: spectro - radiometers (CCD) :surface imager (window) - vertical atmospher soundingcompromise between channel bandwidth – channel number and résolutionweight / volume - power ( actif radar )on board archiving - transmission capabilities
CONSTRAINT (3)acces and distribution( cf « level » .. Data - Product)Scale – résolutionSpatial : global (100-10 km) / regional (10-1km) / local (< 1 km)local acquisition et preprocessing : receiving station (ex : NOAA/HRPT)archiving – distribution (Global/Regional DAC )opérationnal ( WHO ?? )temporal : month / week / instantanneous ( day / hour) - delivery (DT/NRT)Quality« processing » validity ( preprocessing from level 0 to level 4 )calibration – navigation – cloud – geophysical algorithm (ex : SST)«practical issues »software : (I/O : « data format ») – environnement« standards » : raw / netCDF / HDF /... - software tools : matlab / IDL /…consultation (WEB-LAS) - transfert (ftp)distributed or local processing (OpenDAP)
CONSTRAINT (4)history : mécanics (rocket - satellite)électronics – computing (telecom – archiving - processing,..)1972 (LANDSAT) for earth observationmétéorology – environnement :1978(TIROS-N (NOAA)– GOES/ Meteosat1 ) )operationnalsagencies : NOAA – EUMETSAT – JMA – CMA : operationnalPOES : Polar Orbiter Environnement SystemNOAAi ( now 18) – METOP (07/2007) – (FY- i)DMSP ( SSM/I) (Navy , USAF,..)GOES : Geosynchronous ,, ,, ,,GOES-N , Meteosat (Met8-MSG) , GMS, (FY- i+1)scientificsagencies : NASA – ESA – JAXA : experimentalSEASAT (SAR - SMRR), NIMBUS (HCMM-CZCS)-Orbview (seawifs)ERS 1-2 (wind) , JASON – T/P (altimetry)ENVISAT : MERIS,…, EOS (Acqua-Terra..) : MODIS, AMSR,..TRMM/TMI - SMOS
AVAILABLE PRODUCTS FOR OCEAN-SST: Sea Surface Temperature-SSR: Spectral Surface Reflectance or «color» :Normalized leaving Water Radiance by channelCHLA, attenuation (Kxx), CDOM, MES, FLH,optical depth, PP..-« wind »: speed modulus – direction - components - stress-« altimetry »: Sea Level Anomaly ( / mean ) ,derived product : currents, eddies,..- restitution technics- sources- résolutions - history- limitations
Sea Surface Temperature (1)1972 :Thermic Infra-Redchannel usingchannel 10-12 mu : atmospheric transparent window for TIRPlanck law : RadianceBrightness temperature (Tb) Top Of Atmosphere1978 – atmospheric correction « Water Vapour »« Skin » temperaturedifferential absorption : « Split Window » algorithm ( sea emissivity = ctse , WV weak )Radiative transfert modelisation (MODTRAN) + atmospheric models (R.S. : PTH , aerosols, angles,..)+ expérimental adjustement by satellite , day/night with in-situ measurement (buoys)global / local processing (geographic, temporal )CLOUD MASKINGproblem(atmospheric preprocessing )VIS (day ) et MIR-TIR (day – night ) channel usingoutside satellite datas (WV) and/or meteorological analysis/forecastSST climatology – « local » atmospheric methodologyVectorsPolar heliosynchronous - ~ 3000 km by swath2 pass / day : ASCending – DEScending - resolution 1 kmGéosynchronous : acquisition 30 mn (15 mn) – fixed geometrytemporal synthesis : 3H – 12 H - resolution ~ 5 km ( 3km)

Sea Surface Temperature (2)NOAA-AVHRR: Advanced Very High Resolution Radiometer( POES : NOAA-METOP )5 channels VIS/NIR /MIR - 2 TIR ( 11 – 12 mu for atmospheric correction)- NRT : acquisition HRPT/LAC (bande L) Level 0 - preprocessing ( L1b, L2)~ 2000 km around receiving station – 2 (N) orbits/day - satellite ( latitude)~ nominal 1 km ( ~ 5 km side ) – L3/L4 SST reprojected / synthesis (D,W,M)ex : Europe ( SAF OI-Medspiration – 2km ) : NAR-SST , local receiving stations- DT : global recording « on board » (GAC) - ~4 km subpointhistorical re-processing ( calibration, cloud, quality , synthesis,..)PathFinder (PF) PO-DAAC 1985 – 2004 : - V4 : 9 km / V5 : 4km - daily ( night SST)Physical Oceanography – Distributed Active Archive Center - NASAEOS (Terra-Acqua) – MODIS(spectro-imager 32 channels VIS/NIR – MIR – TIR – 1 km )NRT : acquisition (Bande X) + (pre)processing + distributionex : Europe : NERC : Dundee (acq) + PML/RSDAS (océano)DT : 07/2002 (Acqua only ) – presentNASA – JPL : OceanColor (J-2) : day – 3D - week – monthday SST data ( with « color  products »)
Sea Surface Temperature (3)MSG+GOES: geosynchronous ; Atlantic + South East Pacific coverageNRT – DT : SAF-OI / EUMETSAT ( Météo-France / CMS Lannion)Atlantic MSG : 07/2004 ( GOES : 07/2001)3H synthesis (synop) – 12H ( night – day ) ; 10 km resolution1H SST + flags – 5 km resolutionrigourouscloud mask( SAF-NC) + SST algorithmsproduct : Medspiration : EU / GHRSST-PP ( with NOAA-AVHRR 2 km local)GOES/NOAA : 6 km resolutionOthers SST sourcesENVISAT/MERIS : spectro-imager 15 channel VIS-PIR / MIR / IRT – 1 km~ MODIS : multi-usage ( ocean, continent, atmosphere)ENVISAT/AATSR : bi-angular correction 1 channel - scientific productProject : GHRSST-PPcomparaison / validation ( buoys – inter satellite ) : Match Data BaseSST skin-bulk - diurnal heating ( wind , solar flux) – WV/aerosolsclimatologies

Sea Surface Temperature (4)Passive MicroWave (MW)measurement ..( Heritage from DMSP-SSM/I (1988))« bulk » SST restitution by simultaneous MW channels (10.7 GHz for SST )atmospheric interaction ( TWV, PWV, RR:rain ), surface (wind), SST, ..NB : - Sea Surface Salinity (1.4 Ghz – interferometry ) by SMOS / ACQUARIUS (2007 ?)TRMM/TMI Tropical Rainfall Measurement Mission – Microwave Imager : 1998/12« equatorial » orbit 40N-40SEOS-ACQUA/AMSR-E : Advanced Microwave Scanning Radiometer : 2002/07polar heliosynchronous (pb in some countries : radio frequency pollution)NRT/DT : REMSS (ssmi.com) / NASAdaily ( ASC/DES) - synthesis : 3 days / week/ monthno clouds limitations - resolution : ¼ deg (~ 25 km )limitations : precipitation ( rain droplet interaction )near coast ~100 km (continent –Island ) from MW emissivity
SST AVHRR global (PathFinder)Daily ( orb desc) – WeeklyGlobal daily Analyzed productwith number and age observation
SST AVHRR local - regional – 2 km4 pass ( 2 satellites NOAA 16-17)
SST AVHRR2 kmSeptember 20023 WeeksMonthlySource:SATMOSMétéo-France
ATL- SSTMSG-GOESDaily10 km
ATL-SSTMSG-GOES12 hourly (day)10 km( but 3 km « raw »Hourly - MSGIntermediate product )
SST - MWResolution ~25 kmDailyTRMM/TMIOrb ASC/DES1 day3 days synthesisAMSR-E/ACQUA3 dayssynthesis
SSR Spectral Surface Reflectance - « Ocean Color » (1)Interaction of incidente light with particules in suspension in water :Phytoplancton , Dissolved Organic Matter (DOM), suspended matter (MES)Measurement : Radiance values in several VIS channels (narrow bandwith )-hight atmospheric sensibility(diffusion) etCLOUDS- complex atmospherics corrections : WV, ozone, viewing-solar angles , « sun glint »- experimental bio-optical algorithmsNlwr i: Normalized Leaving Water Radiance , band i ( 412, 443, 488, 510/530, 550, 670 mu)CHL: Chlorophylle-a (many algorithms) ocean/coastal : OC4 (seawifs) – OC5 (MODIS) ,others : ocean ( turbidity ,CDOM, MES). ..et atmospheric parameters( PAR, aerosols : AOT, rayleight,..)IOP : Inherent Optical properties , FLH : Fluorescence Line height (photosyntetic efficiency)PP : Primary Productivity
Satellite Receiving signal is80%from atmospheric sources(outside clouds ! )
Top Of Atmosphere Radiances ( Lsat)Atmospheric Radiative Transfer ModelNormalized Water Leaving Radiance (Nlwr) – channel iPhotosynthetic Ocean Color Algorithms PhotosyntheticAvailable Radiation (empirical/semi analytical) efficiency(PAR) solar (0.4-0.7) ( empirically from SST)Sea Surface CHLaconcentrationsPrimary Production modelHigher level model(export production, carbonsequestration, fisheries,)
SSR - « Ocean Color » (2)Vector : heliosynchronous polar orbiter (geosynchronous project : GOES-R .. 2010 ?)1 pass / day ( day orbit )Sensor: CZCS (NIMBUS 7) : Coastal Zone Color Scanner .. For memory !SeaWIFS (orbview2) : Sea-viewing Wide Field of View Sensor 1998-2004MODIS (EOS) : Moderate Resolution Imaging SpectroradiometerTERRA (11/1999) – ACQUA (07/2002)RT : LAC : acquisition idem SST (NOAA,MODIS) Level 0 / 1b , specifics (pre)processing Level 2resolution : 1 km , ex : DUNDEE/RSDAS , local receiving stationNRT - DT : archiving – distribution all levels + other data + validation + softwareNASA/GSFC http://oceancolor.gsfc.nasa.govLevel 1-2 : by orbit et preprocessing (seadas)level 3-4 global: resolution 9km (SeaWifs) ; 4 and 9 km (MODIS/ACQUA only)Products: Nlwr i ,CHLa, K490 (att) – Tau-XX , angstrom +Cloud-Angle-Continent mask«experimentals products » : CDOM Color Dissolved Organic Matter  (yellow substance)CWE clear water epsillon, CFI/FLH : chlorophylle fluorescence, DCC: cocolyth concentrationPAR : Photosynthetically Available Radiation , PP : Primary Productiondaily (1 orbit) and synthesis basis : 3 days, weekly, monthly
simultaneous SST/CHLa MODIS 4km NASA/GSFC(http://oceancolor.gsfc.nasa.gov)
1Day
3Days
1Week
1Month
1Day
1Week
1Month
SST
CHLa
CHLA MODIS 4km 1W – 1M south HUMbold(http://oceanwatch.pifsc.noaa.gov/
« Wind » (1)Micro-Wave measurement( MW)-passive(radiometer) : simultaneous mesures (Tb) in several MW channelsonly speed modulus ( inversion brightness temperature and experimental adjustment )Sensor/vector : DMSP/SSM-I, TRMM/TMI, ACQUA/AMSR-E-active(scatterometer) backscatter measurement of surface ruguosityradar wave emitted and reflected by the surface (stress)wind speed and direction (component)Sensor/vector : Seawind/QuickSCAT , ERS1-2/AMI ,2 pass/days (ASC/DES) level3 (instantaneaous )Operationnal : day/night , under clouds (except précipitation)Limitations : heavy rain - coast (continent, island ) ~ 100 kmdaily « gridded » products by par optimal interpolation in space and timeQS3D : ssmi.com - MWF : Mean Wind Fields CERSAT /IFREMERresolution 0.25/0.5/1.0 degres , daily and weekly, montly synthesis (means)Parameters : meridionnal –zonal components , stress , errors , curl/rotationnal
« Wind » (2)Only one provider NASA/JPL ( QuickScat )End of ERS1-2 (2001) et failing of NSCAT/ADEOSProjet METOP/ASCAT (2006 ) ---------------------------double swath scaterometerarchiving – diffusion centersPO-DAACCERSAT/IFREMERhttp://www.ifremer.fr/cersatSAF-OI/KNMI – EUMETSATssmi.com : passive ( SSM-I , TMI )active (QS)Products « swath » Level 2a/b et « gridded »L3/L4 (MWF)colocated ( buoys )Precipitation and Ice detectionAmbiguity directionMonitoring ( unique and multi instruments )
three antennas:a fore-beam - mid-beam - aft-beamIn its nominal operation, the instrument will yield wind vector measurements in 50 km resolution cells. It will be capable of measuring wind speeds in the range 4 – 24 m/s with an accuracy of 2 m/s or 10% and wind direction in the range 0 – 360° with an accuracy of 20°. On an experimental basis, the instrument will provide measurements at an enhanced resolution of around 25 km.
ASC/DEC daily swath and orbit (benguela)
Module vitesse QS – CERSAT/IFREMER – daily
Module vitesse – AMSR-E ssmi.com - daily
Direction-stress QS CERSAT/IFREMER – monthly
Daily , Weekly and Monthly « gridded » products
« altimetry» (1)L'altimétrie spatiale est une technique permettant de mesurer des hauteurs par satellite. Elle utilise le temps mis par un faisceau radar pour faire l'aller-retour satellite-surface, associé à une localisation précise du satellite, pour effectuer ses mesures.
Principe de l'altimétrieL'altimètre émet une onde radar et l'analyse après réflexion sur la surface. La hauteur de mer est égale à la différence entre ladistance satellite - surface(déduite du temps mis par l'onde pour faire l'aller-retour) et laposition du satellitepar rapport à une surface de référence arbitraire (l'ellipsoïde de référence).Des systèmes de localisation commeDorispermettent une précision extrême sur cetteposition du satelliteen orbite. Il faut aussi tenir compte de la moindre perturbation subie par l'onde radar. La mesure de ces perturbations (par des instruments annexes, ou par l'utilisation de plusieurs fréquences), ou leur estimation par des modèles, permet de corriger la mesure altimétrique.
distribution , archivage : AVISO-ALTIMETRIE(http://www.jason.oceanobs.com/)
« altimetry » (2)Satellite (polar) : Jason-1 , Topex/poseidon, ENVISAT , GFO (Geosat follow-on)Produits « gridded » level 4 (et +)MSLA : (Map Sea level Anomaly with climatologie 7 years climatologyrésolution 1/3 degres NRT et DT , mono et multi-missionsSLA : along the swath – multi satellitecorSSH : monomission , le long de la tracewind – wave : MSWH-MWind swath and gridded (1 deg)surface currents : derived from anomaliesResearch of the best spatio-temporal sampling for phenomenas monitoring (ocean dynamic)
Altimetrics height cover by swath in north-east Atlantic obtained by T/P, ERS-2 et GFO, on 10 , 7 and 3 days observationswe observed en gap of 200 km and more with 3 days synthesisCombination of all missions allow a better cover
DISPONIBILITY ( US025 – IRD Bretagne ) – Global coverSST PFV4– 9 km – monthly /week : 1985/01 - 2003/07month climatologies 85-03 et anomaliesSST PFV5– 4 km – day/8 days/month : 1985/01 – 2006/12monthly synthesis : mean / min / max / std / number of clear sky pixel (nbp)SST MODIS– 4 km – daily/week/month : 2002/07 – present(*)SST SAFO– 10 km – 2/day - : 2004/07 – present (zone ATL)(*)exp : 1H resolutionSST METOP– 10 km – 2:day – 2007/10 – present (*) - exp : 1 km by swath partSST TMI– ¼ deg (25 km) – daily (3d) / week / month : 1998/01 – present(*) AMSR-E(2002/07CHLA SeaWIFS: 9 km – 8 days / month : 1997/09 – 2006/12CHLA MODIS: 4 km – jour / (3days) / 8 days / month : 2002/07 – present(*)MWF QuickScat(QS) ½ deg - day/week/month : 2000/05 - presentMWF ERS½ deg week/month from 1992 - 2000 : 1deg )QS3D¼ deg – weekly/daily : 1999/05 – present(*)QS1Ddaily Ascending-Descending (*)MSLA-H (UV) « merged »1/3 deg - 7 days : 1992/10 – present(*): daily acces for Near Real Time ( delay : 1 – 2 days )
PROCESSING- Decoding the « raw » products (format, resolution, coverage)temporal (begin-end) and spatial extraction by zones- « 3D matrix » datas organized in { TIM – LAT – LON - PARi }analysis et « processing » ofscientific« image data »internal format (matlab) et netCDF for export use-multi-media « image representation »for publication (WEB)cartography – scale phenomena – text - animation- developping an « generic » analysis datainteractivetoolsviewing value « parameter » lat-lon (carto) , plot pixel val- timplot space – time diagram ( hovmoller)- processingclimatologies (means ) – anomaliessynthesis : temporal agregation by N days fixed or slick periodanalysis : EOF ,..

PROCESSING .. In projectsWEB site consultation .. In progress ???Synthetics indexesAutomatic Near Real Time Daily extractionSST : TMI / SAFO / MODISCHLA : MODIS (3D)WIND : QS (3D)transfert – decoding – processing – consultationex : monitoring oceanographic campaign EGEE in Guinea Gulf 2005 06-09daily data on upwelling zonesneCDF writing formatnetCDF Generic tool using : ferret , ncview , ncoSpecific developping software tools for   « users » IDL/matlab
ZONES DEFINITION (not fixed)Regionals : CANaries , BENguela , HUMbold , MOZambique, (CORail),..Locals : MARoc, SENégal, SBE (South Benguela), PERou,.. And EGE
1rst Exemples :SeaWIFS 8DaysLog CHLa sur zones UPwelling
screen copy interactif analysis tools
Cartographie et plot « time »
Coupe espace – temps
SST PFV5 ( 4km)Quality AnalysisInd=0brighness TempInd=4OK (!)Ind=7sévère
Monthly climatologies et anomalies - SST PFV4
PERoudailyMODIS (4km)VsSAFO ( 10 km)
CANariesdailyMODIS (4km)VsSAFO (10 km)
Daily South BEnguelaPFV5 (4km) Vs MODIS (4km)
Daily SENégalMODIS (4km) vs SAFO(10 km)

MONTHLY OBSERVATIONSBENguela 2004/07
MODISSAFOTMIAVHRR (PF)
DAILYOBS.CANaries200412/25AVHRRSAFOTMIMODIS
SST SAFO (10 km) : daily 01-06 / 02 / 2005
BENguelaCHLa SeaWIFSclim8D (2004/12/345-352)CHLa MODISmonth 2004/12
Historical and « operationnal NRT » Level 3 (and +) available :( free of charge for scientific use : NASA/NOAA/EUMETSAT(?),.. =SST: various choices of spatio-temporal resolution- DT : 9km-4km /mois ( 1985 – 2003)4km / day ( AVHRR : PFV4/5 – MODIS ) + synthesis (1985/2000 – 2004)- RT : direct read-out and preprocessing : AVHRR – MODIS 1kminternet : MODIS / day 4 km - SAFO ( MSG+GOES) 10 – 5 km ( 2004/07)AVHRR/METOP 10km (1 km) ( 2007-10) - TMI ( AMSR-E) : 25 km (1998 )CHLa(others parameters ?)- DT : 9 km SeaWIFS ( 1998-present) / month – 8D - MODIS 4 km ( day, 3D, 8D, mm) 2002/07- NRT : direct read-out / internet + processing MODIS 1kmglobal 4km / day (07/2002)« wind »: speed modulus and direction (stress) component (CERSAT/IFREMER)-DT (5-8 days ! ) QuickScat 01/2000 - « gridded » product daily – ½ deg- NRT daily swath (ASC/DES) or 3D composite (REMSS)MSLA: DT / NRT AVISO altimétrie « merged » 1/3 deg - 1992 - present

CONCLUSIONS-Sources complementaritiesrésolution – history – scientific monitoringarchiving specific center byinstrument distributionpar order of increasingcomplexity: SST, color, wind, altimétryemergence of specialized center forthematicsusingcf : Coast Watch (NOAA/US) operationnal oceanographySST (CHL): local (pre)processing high resolution (1 km – polar satellite ) from :RT acquisition (level0) : receiving station ( tracking antenna,..)NRT internet transfert (level 2) if high speed telecomunication linkNRT level 3-4 by internetOpérationnality ? Utilisation (scientific, commercial)- Satellite SSTPolar orbiter : SST IRT maximal resolution but (very) low spatial cover due to CloudsMicro-Wave (and atmosphère ) for global-régional scaleGeosynchronous : SST with high declouding capability - MSG/GOES 1H – 5 km
SATELLITE OBSERVATION DURING EGEE31 During cruise on area « EGE » by mail ( 3 vac/day)-SSTs: TMI (MW) and SAFO (IR) .. Pb on SSTSAFO since 05/24 …oops !!SST SEVIRI 3H composite day ( 01 – 13 H )-CHLAModis (3 days synthesis)-Wind: QuickScat 3DMSG viewingin VIS, MIR, TIR and WV channel (satmos.meteo.fr : CNRS/M-F)Clouds identifications, meteorological situations,..Others: some Seawifs / MODIS «true color »2 - All historical data will be archivedPrevious presented .. SST , SSR , wind, CHL , .. « altimetry »DLI / SSI : Downward Longwave Irradiance / Solar Surface Irrdiance from MSG- SSM/I orbits (latent and sensible heat flux )
SST daily product 2005/06/21 - M-F CMS LannionAMSR/E – SEVIRI/MSG – AVHRR/GAC – AATSR
Daily Atlantic ProductsSSTs : TMI – MODIS –SAFOCHL - windSSI – DLI
On disk « MISSION \Satellites»SSSTTMI - SSTSAFO – SSTSEVIRI - CHLMODIS – WINDQSMSG IRT/MIR/VIS/WVdailydirectory : YYYY-MM-DDproduct:-monthly: historicalEGEE1: 2005 05/24 - 07/03Daily SST TMI - Animationposter AMMA DAKAR 200/12NAAPS: » Navy » Aerosols Products ( seawifs / modis ‘true » color » images)
DAILY : SSTTMI –SSTSAFO – wind – CHL
PRODUCTSSTTMI05/1605/2005/2305/2605/3006/02
PRODUCTSST SEVIRI3H composite11/05 13:0012/06 01:0012/06 13:0014:06 01:00
DAILYMSG12:00VISMIRIRTWV
DAILYMSGIRT00:0006:0012:0018:00
« COLOR COMPOSITION » VIS/IRT
VIS : bright / dark
IRT : hot / cold
Clouds : hight / medium / low – DustSea – Continent (forest, desert,..)
MODIS‘true color »2006/06/01

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OBSERVATOIRE SATELLITE - IRD Bretagne - accueil