DECIGO pathfinder 用 レーザーセンサーの感度評価

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DECIGO pathfinder . 4 . A B C A B C. . . . . . - PowerPoint PPT Presentation

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  • 2010/3/21*DECIGO pathfinder4ABC ABC

    2010/3/21

  • 2010/3/21*

    2010/3/21

  • 2010/3/21*

    2010/3/21

  • 2010/3/21*DECIGO pathfinder DECIGO (FP) ()Fabry-PerotFabry-Perot

    2010/3/21

  • 2010/3/21*

    etcGRACEs data (NASA)

    2010/3/21

  • 2010/3/21*CHAMP (GFZ) 20007GRACE(NASA)20023GOCE (ESA) 20093GPS2(220km )

    2010/3/21

  • 2010/3/21*U+dU U+ThU+dU vm+uN dU U

    2010/3/21

  • 2010/3/21*

    2010/3/21

  • 2010/3/21*DPF cf.) GPS, SLR(Satellite Laser Ranging)1mm 10s1GPS GPS0.14mm/s

    2010/3/21

  • 2010/3/21*

    2010/3/21

  • 2010/3/21* FITAL FRL15DCWD :1550nm : 40 mW inline perpendicular outpout i

    2010/3/21

  • 22010/3/21*130mmoutiInoutprefBS

    2010/3/21

  • 32010/3/21*refIn()outioutpBSmirrormirrorBSPBS

    2010/3/21

  • 42010/3/21*

    2010/3/21

  • 2010/3/21*

    2010/3/21

  • 2010/3/21*outp: -1450mV outi: -2000mV midfringe

    Visibility outp: 81 outi: 74

    ref: -6.4Voutput

    2010/3/21

  • 2 intensity noise, shot noise2010/3/21*outputintensity noiseshot noiseintensity noise AOM refoutput refnoise spectrum output intensity noise

    shot noise out1out2

    2010/3/21

  • 3 2010/3/21*

    2010/3/21

  • 4 2010/3/21*upper limitInline: 13mmPerpendicular: 8mm ( )

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  • 4 2010/3/21*1Hzrms 1.310-7m1sec1 ()

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  • 5 2010/3/21*

    (0.4mm) 3 1ksec100mVref

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  • 2010/3/21*

    2010/3/21

  • 2010/3/21* ()

    cf.) 610-10m/s2(1Hz~10-3Hz) CHAMP310-9m/s2(10-1Hz~10-4Hz)

    2010/3/21

  • 22010/3/21*CHAMP CHAMP10cm GPSA first attempt at time-variable gravity recovery from CHAMP using the energy balance approach; N. Sneeuw et. al. (2002)

    2010/3/21

  • 2010/3/21*

    2010/3/21

  • 2010/3/21* (Geoidetic Reference System 1980)

    cf.)

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  • 2010/3/21* (N: : )N =10-3m, ~ 10m/s2T = 10-2m2/s2()vm ~ 7km/s(500km)dv ~ 110-6m/s (vm: )GPSSLR1mm 10sec12

    2010/3/21

    *****

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