fakultät für physik und geowissenschaften leipziger institut für meteorologie - lim...

Fakultät für Physik und Geowissenschaften

Leipziger Institut für Meteorologie - LIM

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HALO-SRNARVAL Meeting 12./13. January 2012

University of Leipzig / FZ Jülich

Manfred Wendisch, Birger Bohn,André Ehrlich, Clemens Fricke



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Cloud phase

Cloud optical thickness

Particle effective diameter

Liquid IceMixed-phase

Scientific purpose: Remote sensing of clouds



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Measurements of upwelling radiance data ( ) I

Radiative transfer calculations

effR ,

spatial inhomogenity, heterogeneous surface albedo

problems

Scientific purpose: Remote sensing of clouds



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• TECHNO Mission Layout:

• cooperation between FZ Jülich and LIM HALO-SR

Measured variable (1): Radiance

nadir, viewing angle = 2°

spectral range

VIS: 350-1000 nm NIR: 1000-2000 nm

FWHM: 1.5 nm (VIS) 8-9 nm (NIR)

remote sensing



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• TECHNO Mission Layout:

• cooperation between FZ Jülich and LIM HALO-SR

Measured variable (2): actinic flux density

both hemispheres

spectral range

UV/VIS: 270-650 nm

FWHM: 1.5 nm

Photolytic frequencies



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• spectrometers got admittance related to the TECHNO Mission layout

no more general accreditation/certification necessary at this point – „revision“ only

• experiences from TECHNO Mission offer no problems except further stability checks

Accreditation & technical situation:



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• target aperture plates - top:

Techno Mission (ApT-5) NARVAL (ApT-5)



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• target aperture plates - bottom:

Techno Mission (ApB-4)

NARVAL (ApB-8)



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• rackposition has to be transferred to the rear

• operator seat not essential (remote control possible)

• Max. distance: optical inlet bottom – spectrometer = 9m optical inlet top – spectrometer = t.b.a.

• calibration on ground (ground power needed)



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

Rackposition:



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• 19“ Inlet• ~ 40kg weight

• chassis radiance:448x127x450 mm (WxHxD)3U3A x 28V 40W (max. 80W)

• chassis actinic flux density:similar to radiance3A x 28V3U40W (max. 85W)

• chassis power distribution unit

1U



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Thanksfor your

attention !



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(Eichler, 2009)



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(Eichler, 2009)(Eichler, 2009)



20

Mixture

HexagonalPlates

Solid columns

Rough aggregates

Ice spheres

(Eichler, 2009)

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21

Mixture

HexagonalPlates

Solid columns

Rough aggregates

Ice spheres

(Eichler, 2009)

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Motivation HALO TECHNO Mission Messbeispiele & Scientific Outlook

Definitions – radiative quantities:

• spectral solar radiance Iλ (W m-2 nm-1 sr -1)

• spectral solar actinic flux density

Fact, λ (W m-2 nm-1)

downward: upward:

Remote sensing

Photolytic frequency



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fakultät für physik und geowissenschaften leipziger institut für meteorologie - lim...

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