NARVAL Meeting 12./13. January 2012

Präsentation zum Thema: "NARVAL Meeting 12./13. January 2012"—  Präsentation transkript:

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

2 Cloud optical thickness Particle effective diameter
Scientific purpose: Remote sensing of clouds Cloud optical thickness Particle effective diameter Liquid Mixed-phase Ice Cloud phase

3 Scientific purpose: Remote sensing of clouds
Measurements of upwelling radiance data ( ) Radiative transfer calculations problems , spatial inhomogenity, heterogeneous surface albedo

4 remote sensing TECHNO Mission Layout:
cooperation between FZ Jülich and LIM HALO-SR Measured variable (1): Radiance nadir, viewing angle = 2° spectral range VIS: nm NIR: nm FWHM: 1.5 nm (VIS) 8-9 nm (NIR) remote sensing

5 Photolytic frequencies
TECHNO Mission Layout: cooperation between FZ Jülich and LIM HALO-SR Measured variable (2): actinic flux density both hemispheres spectral range UV/VIS: nm FWHM: 1.5 nm Photolytic frequencies

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10 Accreditation & technical situation:
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

11 target aperture plates - top:
Techno Mission (ApT-5) NARVAL (ApT-5)

12 target aperture plates - bottom:
Techno Mission (ApB-4) NARVAL (ApB-8)

13 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)

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

15 chassis actinic flux density: similar to radiance
19“ Inlet ~ 40kg weight chassis radiance: 448x127x450 mm (WxHxD) 3U 3A x 28V 40W (max. 80W) chassis actinic flux density: similar to radiance 40W (max. 85W) chassis power distribution unit 1U

16 Thanks for your attention !

17 - Time series of retrieved optical thicknesses τ and effective radius Reff for different
ice crystal shape assumptions for flight 22 May, 2007 (period 1 (P1), 43,146–43,220 s) and (period 2 (P2), 43,419–43,435 s). Lidar-derived τ are also shown (for P2) and Reff determined from FSSP+CPImeasurements are indicated (for P1 and P2) by black stars, respectively. Error bars based on measurement uncertainties are included. Different y-scales are used. (Eichler, 2009)

18 - Time series of retrieved optical thicknesses τ and effective radius Reff for different
ice crystal shape assumptions for flight 22 May, 2007 (period 1 (P1), 43,146–43,220 s) and (period 2 (P2), 43,419–43,435 s). Lidar-derived τ are also shown (for P2) and Reff determined from FSSP+CPImeasurements are indicated (for P1 and P2) by black stars, respectively. Error bars based on measurement uncertainties are included. Different y-scales are used. (Eichler, 2009)

19 - Time series of retrieved optical thicknesses τ and effective radius Reff for different
ice crystal shape assumptions for flight 22 May, 2007 (period 1 (P1), 43,146–43,220 s) and (period 2 (P2), 43,419–43,435 s). Lidar-derived τ are also shown (for P2) and Reff determined from FSSP+CPImeasurements are indicated (for P1 and P2) by black stars, respectively. Error bars based on measurement uncertainties are included. Different y-scales are used. (Eichler, 2009) (Eichler, 2009)

20 (Eichler, 2009) Mixture Hexagonal Plates Solid columns
Rough aggregates Ice spheres - Time series of retrieved optical thicknesses τ and effective radius Reff for different ice crystal shape assumptions for flight 22 May, 2007 (period 1 (P1), 43,146–43,220 s) and (period 2 (P2), 43,419–43,435 s). Lidar-derived τ are also shown (for P2) and Reff determined from FSSP+CPImeasurements are indicated (for P1 and P2) by black stars, respectively. Error bars based on measurement uncertainties are included. Different y-scales are used. (Eichler, 2009)

21 (Eichler, 2009) Mixture Hexagonal Plates Solid columns
Rough aggregates Ice spheres - Time series of retrieved optical thicknesses τ and effective radius Reff for different ice crystal shape assumptions for flight 22 May, 2007 (period 1 (P1), 43,146–43,220 s) and (period 2 (P2), 43,419–43,435 s). Lidar-derived τ are also shown (for P2) and Reff determined from FSSP+CPImeasurements are indicated (for P1 and P2) by black stars, respectively. Error bars based on measurement uncertainties are included. Different y-scales are used. (Eichler, 2009)

22 uncertainties are included. Different y-scales are used.
- Time series of retrieved optical thicknesses τ and effective radius Reff for different ice crystal shape assumptions for flight 22 May, 2007 (period 1 (P1), 43,146–43,220 s) and (period 2 (P2), 43,419–43,435 s). Lidar-derived τ are also shown (for P2) and Reff determined from FSSP+CPImeasurements are indicated (for P1 and P2) by black stars, respectively. Error bars based on measurement uncertainties are included. Different y-scales are used.

23 Iλ (W m-2 nm-1 sr -1) Fact, λ (W m-2 nm-1)
downward: upward: Definitions – radiative quantities: Iλ (W m-2 nm-1 sr -1) spectral solar radiance Remote sensing spectral solar actinic flux density Fact, λ (W m-2 nm-1) Photolytic frequency Motivation HALO TECHNO Mission Messbeispiele & Scientific Outlook

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