Chapter 9 Active Remote Sensing 2010.ppt - Atomic Physics · Stromboli Vulcano Etna. 2010-11-30 12...
Transcript of Chapter 9 Active Remote Sensing 2010.ppt - Atomic Physics · Stromboli Vulcano Etna. 2010-11-30 12...
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Differential OpticalAbsorption SpectroscopyDOAS
Sulphur dioxide DOAS Measurement
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Diodel
External gasPD
Referencecells
Retro-reflector
PD
laser
PD
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TDLAS, Water vapour absorption
Direct detection
Two-tonefrequencyq y
modulation
LIDAR
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Nymölla Pulp Plant
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Lund mobile Lidar system
Nd:YAG OPOIR mix Nd:YAGIR mix
El
OMA
Air & Watercooling
Calib.Power Supply
IR mixOPONd:YAG
Ele
ctro
nics
Air sys
Nd:YAG
Power Supply
cooling
.
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The mobile Lidar system
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Sulphur dioxide absorption cross section
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Atomic Mercury Lidar Mapping and Flux
MeasurementRosignano Solvay, Italy
VERT.
HOR.
Optical monitoring of geophysical gases
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Lidar monitoring of Hg in geothermal fields:Svartsengi, Krysuvik, Nesjavellir (IS),
Larderello, Piancastagnaio, Bagnore, Castelnuovo Val di Cecina, Lagoni Rossi (IT)Svartsengi
Castelnuovo (Cecina)Lagoni Rossi
Volcanoe Monitoring
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RV Urania and the Lund Lidar system in the port of Bari
Stromboli Vulcano
Etna
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Lidar monitoringof SO2 at Stromboli
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LIDAR REMOTE FLUORESCENCE MONITORING
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3.5x 10
4
1.8
2x 10
5
DOM
3.520
18a b
RamanDOM
Vertical maritime lidar monitoring, Mediterrenean
0.5
1
1.5
2
2.5
3
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
Raman
Chlorophyll
Harbour
Costal
Ocean
0 0
0.5
1.0
1.5
2.0
2.5
3.0
0
18
16
14
12
2
4
6
8
10
Inte
nsi
ty (
a.u.
)
Inte
nsity
(a.
u.)
Harbour
Coastal
Ocean
4 m
8 m
DOM
Depth
Chlorophyll
Raman
Chlorophyll
350 400 450 500 550 600 650 700 7500
350 400 450 500 550 600 650 700 7500
350 400 450 500 550 600 650 700 750 350 400 450 500 550 600 650 700 7500.00
Wavelength (nm) Wavelength (nm)
400 500 600 700 8000
5000
10000
15000
1
400 500 600 700 8000
5000
10000
15000
2
400 500 600 700 8000
1
2
3
4
5x 10
43
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LIDAR REMOTE FLUORESCENCE MONITORING
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LUNDCATHEDRAL
LIDAR INCULTURAL HERITAGE
MONITORING
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Building up a spectrum from principal component spectra
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Multi-variatespectralanalysis classifies
areas
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7
8
9
1
1
Pix
el
5
10
15
20
25
30
(b))
Pixel10 20 30 40 50 60 70
3
4
5
6
Pixel10 20 30 40 50 60 70
30
35
40
45
50
(b)) PARMABAPTISTERY
1500
2000
2500
3000
0
500
1000
390 490 590 690
0
2000
4000
6000
8000
10000
12000
14000
16000
18000
390 490 590 690
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RomeColiseum
2005
Imaging scenarios for different background light conditions
1
2
a b c
3 4
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Target
Mobile lidar systema
Laser beam path
b
To roof-top
REMOTE
LIBS
Nd:YAG
OMA
Beam expander
scanning mirrors
Receiving telescope
Remote Laser-Induced Break-Down Spectroscopy (LIBS)
Iron plate(Fe)
Emission spectrum detected in plasma after-glow150 mJ/pulse
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Remote laser ablative cleaning, 60 m
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SLAR Principle
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ShipShip
Ship
25 tonnes of crude oil
ShipShip
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Earthquake at Bam, IranMaximum 48 cm displacement
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Sinking Venice1 cm in 5 years
Underwater volcanic activity at Panarea (Sonar recording)