RETRIEVAL OF ATMOSPHERIC BOUNDARY LAYER
HEIGHT BY CSIR-NLC MOBILE LIDAR, PRETORIA
(25.5°S; 28.2°E), SOUTH AFRICA
Prof. Venkataraman Sivakumar CSIR - National Laser Centre [email protected] [email protected]
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System 3-D View
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System Block Diagram
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It’s safe, person can walk
around even when the laser is
in operational.
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Initial Tests
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Signal to Noise
0
5
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25
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40
1.E+02 1.E+04 1.E+06 1.E+08 1.E+10
Photons per second
He
igh
t [k
m]
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0-16
km
Up
to 5
0 k
m
26 – 29 km
2-3 km
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Preliminary Results23 Feb 2008
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Height profile of range corrected LIDAR signal returns and the illustration of detection of Boundary Layer by slope method.
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Height-Time-Color map of LIDAR signal returns (arb.unit) for 10 August 2010. The figure is overlapped by the determined boundary layer height (Black: statistical based on range corrected signal, Pink: slope method)
Temporal evolution of difference in detected boundary layer height.
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First “Lidar Field Campaign”
First 23-hour continuous measurement at University of Pretoria
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Height-Time(diurnal)-Color map of LIDAR signal returns (arb.unit) for 16-17 October 2008. The figure is overlapped by the determined boundary layer height (Black: statistical based on range corrected signal, Pink: slope method)
Temporal evolution of difference in detected boundary layer height.
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LIDAR measurements at Elandsfontein
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01-02 December 2010
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SANOX – Campaign Expt. 23-27 May 2011
23-24 May 2011
24 May 2011 27 May 2011
Slide 20 © CSIR 2008 www.csir.co.za
Our future scientists
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Where does it go ?
How does it impact ?
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Schematic view of the planned LIDAR system with Scanner
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Initial result from 2-Channel (532 nm and 355 nm)
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1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07 1.E+08 1.E+09 1.E+10
He
igh
t [k
m]
Photons per second
355 nm532 nm
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