CNES PRIORITIES IN POLAR AND CRYOSPHERE RESEARCH .CNES PRIORITIES IN POLAR AND CRYOSPHERE RESEARCH

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  • CNES PRIORITIES IN POLAR AND CRYOSPHERE RESEARCH

    Polar Space Task Group 3rd Session

    Juliette Lambin, Steven Hosford

    Wednesday, May 22th, 2013

    Paris, France

    1

  • OU

    TLIN

    E

    CNES MISSIONS FOR POLAR/CRYOSPHERE OBSERVATIONSRADAR: ALTIMETRY, SAROPTICAL IMAGERY

    06/06/20132

  • Prsentation programme SARAL J. Lambin, fvrier 20133

    10 11 12 13 14 15 16 17 18 19 20 21 22

    WideSwath

    altimetry

    Saral/AltiKaFr./India

    09Launc h date

    Altimetry12/01

    3/02

    Jason-1 France/USA Jason-3 Europe/USA

    Proposed(A/B)

    Sentinel3BEurope

    SWOT USA/France

    JasonCS

    AandBEurope/USA

    Sentinel-3A Europe

    fpJuly2012

    Geodetic orbit

    ENVISAT Europe

    Ocean missions @ CNES (various levels of contributions)

    06/08

    SalinitySMOSEurope

    CFOSAT Fr./ChinaWind

    Wave

    OceanColourPARASOL/POLDERFrance12/04 OCAPI ???

    Concept(O)

    Sentinel-3A-B Europe

  • 06/06/20134

  • OCEAN WAVEFORM

    06/06/20135

  • ICEBERG DETECTION FROM ALTIMETRY

    GlobCurrent, March 7th, 2012 Juliette Lambin, CNES6

  • 06/06/20137

  • SARAL SATELLITE FOR ARGOS AND ALTIKA

    Cooperation with ISRO (India Space Research organization)Ka-band nadir altimetry missionHigher precision, shorter along-track sampling

    Gap filler between ENVISAT & SENTINEL3Same orbit as ENVISAT (35 days, SSO)New Ka-band altimeter, higher precision, compact design, integrated radiometer/altimeterPOD: DORIS, LRAOther CNES payload Argos-3 instrument, X-band telemetry

    Status: Launched by PSLV (ISRO) on Feb 26th Validation phase on-going

    Data policy : ~ the same as JASON missionsPI: Jacques Verron (LEGI)

  • SARAL FIRST RESULTS

    Altimeternoise Specifications Measuredon

    groundInflightdata

    1Hzrange 1.5cm 0.9cm 0.9cm1HzSWH 6.3cm 5.7cm 5cm1HzSigma0 0.2dB* NA 0.012dB

    Excellent performance:

    Real-time orbit < 5cm rms (no fine tuning yet)X-over analysis Jason2

    SARAL indicate good consistencyRain impact under control

    9

  • ReculdesglacesdemerArctiques

  • SeaIceThicknessaccessiblethroughaltimetry

  • Antartica:30Mkm3:heightchangefrom altimetry(ENVISAT)

    m/an

    T.Flament

  • AltikaonboardSARAL:Whatwillitbringto

    polarstudies?

    1

    SameorbitasERS1,ERS2,EnvisatAbout20yearsofcontinuousmeasurements

    Necessaryforcontinental

    icesheets

  • AltikaonboardSARAL:Whatwillit

    bringtopolarstudies?

    Ku25m

    Ka210cm

    2

    Kaband(35GhZ),penetrationdepth

    isabout50timeslessthanKu(13.6

    GhZ)

  • 3

    Smallerbeam(0.55

    aulieude1.22en

    Ku)=>smallerfootprint

    AltikaonboardSARAL:Whatwillit

    bringtopolarstudies?

  • 4

    AltiKafrequencyandbandwidth

    induceabetterverticalresolution

    (30cmwrtto45inKuband)

    Waveformwithless

    penetration,smallerfootprint,

    bettersampling

    5

    HigherPRFinKaband,alongtrack

    samplingtwicetheKubandone(175

    minsteadof350m)

    6

    Firsttimewewillbenefitfrom

    combinationofactiveandpassive

    measurement(altimeter

    radiometer),inKaband

    AltikaonboardSARAL:Whatwillit

    bringtopolarstudies?

  • TWO SLIDES ON CFOSAT CHINA-FRANCE OCEANOGRAPHY SATELLITE

    China-France CooperationCurrently in phase C/DLaunch expected end of 2014

    SWIM, new spaceborne instrument

    technology innovations (antenna, on-board digital processing)Nadir chanel ~altimeter

    SCAT, new concept of wind scatterometer

    Ku-band, rotating fan-beam

    Access to 2D wave spectrum with high angular resolution and with

    global scaleJoint measurements of winds and wavesPI: Danile Hauser (CNRS/LATMOS)

    SSOOrbit,7amdescending

    519kmaltitude,13dayscycle

  • 18

    SWIM INSTRUMENT

    SurfaceWavesInvestigationandMonitoring

    RealapertureradarinKuband6incidenceangles:0,2,4,6,8

    et10

    Rotationspeed:5.7rpm

    Willmeasure:Directionnalwavespectruminthewavelenghtrange

    70500m

    Accuracy:10%onwavelength,15

    ondirection,15%on

    spectrallevelaroundthepeak

    SWHandwindspeedfromnadir

    Normalizedradarcrosssectionfrom0

    to10Absoluteaccuracyof1dB,relativeaccuracybetween

    incidences

    0.1dB

    Airborneinstrumentin2012(KUROS)

  • CFOSAT ON ICE

    Secondary objectives

    polar ice sheet and land surfacemonitoring: roughness, vegetation and soil moistness in semi-arid regions, polar ice sheet characterics=>Multi-incidence normalized radar cross-section for estimatingSurface parameters (in particular roughness)

  • SWOT SURFACE WATER AND OCEAN TOPOGRAPHY

    Hydrology and Oceanography mission Global, repeated high-resolution elevation measurements of ocean and inland water bodiesBaseline payload : Ka-band interferometric altimeter (KaRIn)Traditional altimetry payload

    CNES budget secured in March11 through General

    Investment Fund

    NASA/CNES Cooperation scheme approvedMission Concept Review succesfully passed in Sept 2012Phase A

    underway at CNES, pre-phase A

    at NASA/JPL (Key Decision Point A

    in a few days!)CNES involvement:Participation in KaRInDORIS, AltimeterPlatformGround segment

    Launch~2020!

  • SIMULATION OF OCEAN DYNAMICS BY SWOTSIMULATION OF OCEAN DYNAMICS BY SWOT80

    0 km

    600 km

    200km

  • CNES INVOLVEMENT IN OCEAN OBSERVATION

    Ocean sciences are one of the major interests of CNES Earth observation programsSupporting (and supported by) a strong scientific community through dedicated research funding Supporting several larger scope projects and initiatives (e.g. Mercator-Ocean, CORIOLIS and bioArgo, Boussole, GIS COOC)Strong support to R&D (Instrument, mission concepts, data processing)

    In terms of satellites missions, the heavy weight is still on physical ocean observationaltimetry (Jason-1/2/3/CS, SARAL/AltiKa, SWOT, Sentinel-3, Hy-2A, )salinity (SMOS) wind/waves (CFOSAT),ocean color: PARASOL, Sentinel-3, GEOCAPI

    Slide Number 1Slide Number 2Ocean missions @ CNES (various levels of contributions)Slide Number 4OCEAN WAVEFORMICEBERG DETECTION FROM ALTIMETRYSlide Number 7SARAL SATELLITE FOR ARGOS AND ALTIKA SARAL FIRST RESULTSSlide Number 10Slide Number 11Antartica: 30 M km3: height change from altimetry (ENVISAT)Slide Number 13Slide Number 14Slide Number 15Slide Number 16TWO SLIDES ON CFOSAT CHINA-FRANCE OCEANOGRAPHY SATELLITE SWIM INSTRUMENTCFOSAT ON ICESWOT SURFACE WATER AND OCEAN TOPOGRAPHY SIMULATION OF OCEAN DYNAMICS BY SWOTCNES INVOLVEMENT IN OCEAN OBSERVATION