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Remote Sensing of Clouds and Radiative Transfer: HALO-SR.NARVAL Meeting

This meeting, held in January 2012 at the University of Leipzig and FZ Jülich, discussed remote sensing of clouds focusing on cloud optical thickness, particle diameter, and cloud phases. Accreditation and technical details related to the Techno Mission layout were addressed. The meeting also touched upon the measurement of actinic flux density, spectral ranges, and calibration requirements. The scientific outlook emphasized the importance of radiative quantities and photolytic frequencies in remote sensing activities.

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Remote Sensing of Clouds and Radiative Transfer: HALO-SR.NARVAL Meeting

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  1. HALO-SR NARVAL Meeting 12./13. January 2012 University of Leipzig / FZ Jülich Manfred Wendisch, Birger Bohn, André Ehrlich, Clemens Fricke

  2. Scientific purpose: Remote sensingofclouds Cloud optical thickness Particle effective diameter Liquid Mixed-phase Ice Cloud phase

  3. Scientific purpose: Remote sensingofclouds Measurementsofupwellingradiancedata( ) Radiativetransfercalculations problems , spatialinhomogenity, heterogeneoussurfacealbedo

  4. TECHNO Mission Layout: • cooperationbetween FZ Jülich and LIM HALO-SR • Measured variable (1): Radiance • nadir, viewing angle = 2° • spectralrange • VIS: 350-1000 nm • NIR: 1000-2000 nm • FWHM: 1.5 nm (VIS) • 8-9 nm (NIR) remote sensing

  5. TECHNO Mission Layout: • cooperationbetween FZ Jülich and LIM HALO-SR • Measured variable (2): actinicfluxdensity • bothhemispheres • spectralrange • UV/VIS: 270-650 nm • FWHM: 1.5 nm Photolyticfrequencies

  6. Accreditation & technicalsituation: • spectrometersgotadmittancerelatedtothe TECHNO Mission layout • nomoregeneralaccreditation/certificationnecessaryatthispoint– „revision“ only • experiencesfrom TECHNO Mission offernoproblemsexceptfurtherstabilitychecks

  7. targetapertureplates - top: Techno Mission (ApT-5) NARVAL (ApT-5)

  8. targetapertureplates - bottom: Techno Mission (ApB-4) NARVAL (ApB-8)

  9. rackpositionhastobetransferredtotherear • operatorseat not essential • (remote controlpossible) • Max. distance: • opticalinletbottom – spectrometer = 9m • opticalinlet top – spectrometer =t.b.a. • calibrationon ground (ground power needed)

  10. Rackposition: Techno Mission (pos. 02) Narval (target: pos. 09/16/18)

  11. 19“ Inlet • ~ 40kg weight • chassisradiance: • 448x127x450 mm (WxHxD) • 3U • 3A x 28V • 40W (max. 80W) • chassisactinicfluxdensity: • similartoradiance • 3A x 28V • 3U • 40W (max. 85W) • chassis power distributionunit • 1U

  12. Thanks foryour attention !

  13. (Eichler, 2009) fricke@uni-leipzig.de

  14. (Eichler, 2009) fricke@uni-leipzig.de

  15. (Eichler, 2009) (Eichler, 2009) fricke@uni-leipzig.de

  16. Mixture Hexagonal Plates Solid columns Roughaggregates Icespheres (Eichler, 2009) fricke@uni-leipzig.de

  17. Mixture Hexagonal Plates Solid columns Roughaggregates Icespheres (Eichler, 2009) fricke@uni-leipzig.de

  18. fricke@uni-leipzig.de

  19. downward: upward: Definitions – radiativequantities: Iλ(W m-2 nm-1sr-1) • spectral solar radiance Remote sensing • spectral solar actinicfluxdensity Fact, λ(W m-2 nm-1) Photolyticfrequency Motivation HALO TECHNO Mission Messbeispiele & Scientific Outlook

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