ID.10532 Atmospheric Dynamics from LIDAR The Research from...
Transcript of ID.10532 Atmospheric Dynamics from LIDAR The Research from...
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ID.10532 Atmospheric Dynamics from LIDAR
The Research from Vehicle-mounted to Space-borne Doppler Wind LIDAR
Zhishen Liu1, Zhen Chen1, Cuirong Yu1, Bingyi Liu1, Zhigang Li2
1 Ocean Remote Sensing Institute, Ocean University of China 2 Lu Dong University
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Team Composition
European PI(s) Dr. Oliver Reitebuch, DLR, Germany, [email protected] Prof. Jan-Peter Muller, UCL, UK, [email protected] Chinese PI(s) Prof. LIU Zhi-Shen, OUC, China, [email protected] Dr. YANG Lei, CMA, China, [email protected]
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Project Objectives We will provide an independent and credible measurement of radial wind speed, wind profile, 3D wind vector, aerosol-backscatter ratio aerosol extinction coefficient, extinction-to-backscatter ratio (limited in the atmospheric boundary layer and troposphere), sea surface wind vectors using the direct-detect Doppler wind lidar / HSRL (High Spectral Resolution Lidar) with an iodine filter during ADM-Aeolus overpass ground-based lidar site (N 36.04, E 120.20). In addition to the lidar observations, wind profiles and other relevant meteorological data from radiosonde could also be provided. These results can be compared with the data products of ADM-Aeolus, and we will analyze the comparison results and present assessment reports to ESA.
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Validation mode
Wind Lidar
北西
東
南
发射
大气后向散射信号
测风激光雷达
大气风场
北西
東
南
发射
大气后向散射信号
测风激光雷达
大气风场
Ground based Mobile Doppler lidar ADM-Aeolus
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Doppler wind lidar based on iodine filter
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6 0 5 10 15
101
102
103
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105
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108
Height (km)
Pho
ton
Cou
nts
PMT1PMT2
-3 -2 -1 0 1 2 3
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Relative Frequency (GHz)
Nor
mal
ized
Tra
nsm
issi
on
A
B
aerosol & molecular
molecular
ab
m
R ββ
=
aerosol volume backscatter coefficients molecular volume backscatter coefficients
aerosol backscatter ratio
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• Ground based Doppler wind lidar Wind profile measurements
Doppler lidar in container
Liu et al., 1997, 2002, 2007
0
1
2
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7
160 180 200 220 240 260 280 300
Lidar Balloon
Wind direction (degree)
Altit
ude
(km
)0
1
2
3
4
5
6
7
0 5 10 15 20 25 30
Lidar Balloon
Wind speed (m/s)
Altit
ude
(km
)
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Daytime operation The daytime operation within a range of 12 km is achieved by – matching of divergence and field of view – using fiber to restrain near-field light – using interference filter with narrow bandwidth
0
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0 90 180 270 0 90Wind Direction (Degree)
Hei
ght (
km)
SondeLidar
0
2
4
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10
12
0 10 20 30 40 50Wind Speed (m/s)
Hei
ght (
km)
SondeLidar
May 6, 2006 16:50 Wind profile(Left: wind direction, right: wind speed)
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9
backscatter ratio, May 7 2006
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10
Compact and Modular Design
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Mobile Doppler lidar • 3-Dimenssional wind field
measurements including: Wind profile Horizontal wind distribution
Transmitting subsystem Wavelength 532 nm Repetition rates 500 Hz Pulse energy* 3 mJ Line width <100 MHz Spectral purity > 99.9% Divergence 100 μrad Receiving subsystem Field of view 200 μrad Interference filter bandwidth 0.11 nm Interference filter peak transmission 76% PMT quantum efficiency 0.1 Telescope and scanner subsystem Aperture of scanner 320 mm Aperture of telescope 305 mm
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Wind Direction (°)
Hei
ght (
km)
0 90 180 270 0 900
1
2
3
4
5
6
Wind Speed (m/s)
Hei
ght (
km)
0 10 20 30 40 500
1
2
3
4
5
6
LidarRadiosonde
Wind profile measured by lidar (blue) and radiosonde (red) in 18 April 2011.
Radiosonde launch time: 19:15,
lidar measurement time: 19:30−19:38,
Blue shadow (3.95-6.25 km) shows
height cover range of radiosonde
during lidar measurement.
Example of wind profile
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0 5 10 15 20 25 30 35 400
5
10
15
20
25
30
35
40
Wind Speed by Radiosonde (m/s)
Win
d Sp
eed
by L
idar
(m/s
)
0
10
20
30
40
50
60
70
80
90
100
n = 2074RMSD = 2.59 m/s
0 5 10 15 20 25 30 35 400
5
10
15
20
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30
35
40
Wind Speed by Radiosonde (m/s)
Win
d Sp
eed
by L
idar
(m/s
)
0
10
20
30
40
50
60
70
80
90
100
n = 3745RMSD = 2.76 m/s
0 5 10 15 20 25 30 35 400
5
10
15
20
25
30
35
40
Wind Speed by Radiosonde (m/s)
Win
d Sp
eed
by L
idar
(m/s
)
0
5
10
15
20
25
30
35
40
45
50
n = 1671RMSD = 2.95 m/s
Statistics of wind profiles ALL n=3765
PM n=2074
AM n=1671
-15 -10 -5 0 5 10 150
50
100
150
200
250
300
350
400
Lidar Wind - Radiosonde Wind (m/s)
Coun
ts
Bias = 0.75 m/s
-15 -10 -5 0 5 10 150
50
100
150
Lidar Wind - Radiosonde Wind (m/s)
Coun
ts
Bias = 1.28 m/s
-15 -10 -5 0 5 10 150
50
100
150
200
250
Lidar Wind - Radiosonde Wind (m/s)
Coun
ts
Bias = 0.32 m/sALL n=3765
PM n=2074
AM n=1671
RMS 2.76m/s
RMS 2.59m/s
RMS 2.95m/s
Bias 0.75m/s
Bias 0.32m/s
Bias 1.28m/s
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Sea surface wind
0 1 2 3 4 5 6 7 8 9 1010
-2
10-1
100
101
102
103
Height (km)
Phot
on C
ount
s
Measurement ADReference ADMeasurement PCReference PCMeasurement GluedReference Glued
120.42 120.43 120.44 120.4536.02
36.03
36.04
36.05
36.06Qingdao
Maidao
Longitude
Latit
ude
m/s
0
1
2
3
4
5
6
7
8
9
10
Raw data
LOS wind
Sea surface wind
Horizontal wind vector (at height h)
VAP method
Directional measurement: zero wind ratio r0, sensitivity S
Scanning measurement: wind ratio RW,i
LOS velocity (with systematic bias)
LOS velocity
VAD calibration
LOS velocity:
Removing systematic bias
Horizontal wind vector (at 10m height)
Height adjustment
, 0,
0
W iFLOS i
R rRVS r S
−= =
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120.40 120.41 120.42 120.43 120.44 120.45 120.46 120.47 120.4836.00
36.01
36.02
36.03
36.04
36.05
36.06
m/s
Longitude (°E)
Maidao
Qingdao
Latit
ude
( °N
)
-20
-15
-10
-5
0
5
10
15
20
120.40 120.41 120.42 120.43 120.44 120.45 120.46 120.47 120.4836.00
36.01
36.02
36.03
36.04
36.05
36.06
m/s
Longitude (°E)
Maidao
Qingdao
Latit
ude
( °N
)
-20
-15
-10
-5
0
5
10
15
20
120.40 120.41 120.42 120.43 120.44 120.45 120.46 120.47 120.4836.00
36.01
36.02
36.03
36.04
36.05
36.06
m/s
Longitude (°E)
Maidao
Qingdao
Latit
ude
( °N
)
-20
-15
-10
-5
0
5
10
15
20
120.40 120.41 120.42 120.43 120.44 120.45 120.46 120.47 120.4836.00
36.01
36.02
36.03
36.04
36.05
36.06
m/s
Longitude (°E)
Maidao
Qingdao
Latit
ude
( °N
)
-20
-15
-10
-5
0
5
10
15
20
120.40 120.41 120.42 120.43 120.44 120.45 120.46 120.47 120.4836.00
36.01
36.02
36.03
36.04
36.05
36.06
m/s
Longitude (°E)
Maidao
Qingdao
Latit
ude
( °N
)
-20
-15
-10
-5
0
5
10
15
20
120.40 120.41 120.42 120.43 120.44 120.45 120.46 120.47 120.4836.00
36.01
36.02
36.03
36.04
36.05
36.06
m/s
Longitude (°E)
Maidao
Qingdao
Latit
ude
( °N
)
-20
-15
-10
-5
0
5
10
15
20
120.40 120.41 120.42 120.43 120.44 120.45 120.46 120.47 120.4836.00
36.01
36.02
36.03
36.04
36.05
36.06
m/s
Longitude (°E)
Maidao
Qingdao
Latit
ude
( °N
)
-20
-15
-10
-5
0
5
10
15
20
120.40 120.41 120.42 120.43 120.44 120.45 120.46 120.47 120.4836.00
36.01
36.02
36.03
36.04
36.05
36.06
m/s
Longitude (°E)
Maidao
Qingdao
Latit
ude
( °N
)
-20
-15
-10
-5
0
5
10
15
20
120.40 120.41 120.42 120.43 120.44 120.45 120.46 120.47 120.4836.00
36.01
36.02
36.03
36.04
36.05
36.06
m/s
Longitude (°E)
Maidao
Qingdao
Latit
ude
( °N
)
-20
-15
-10
-5
0
5
10
15
20
Example of sea surface wind before rain (LOS velocity) August 18, 2007 08:10~08:30 (Time interval: 2 min)
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Experiment period: 1.August 8~23 2.September 6~13
Meteorological Service for 2008 Olympic Sailing Game
120.42 120.43 120.44 120.4536.02
36.03
36.04
36.05
36.06Qingdao
Maidao
Longitude
Latit
ude
m/s
0
1
2
3
4
5
6
7
8
9
10
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Wind profile measurements during spacecraft landing
Wind profiles before landing of Shenzhou 7
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18
Reported by worldwide media
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19
Moving measurements of the Mobile Doppler LIDAR
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Wind profile (VAD method)
0 90 180 270 360-10
-5
0
5
10
Azimuth (°)
LOS
velo
city
(m/s)
LOSsine-fit
0 90 180 270 0 900
2
4
6
8
10
Wind Direction (°)
Hei
ght (
km)
0 20 40 60 800
2
4
6
8
10
Wind Speed (m/s)
Hei
ght (
km)
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机载光学稳定隔振平台结构模拟图
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Maximum altitude 3500 m Maximum take-off weight 5.3 ton
Actual flight altitude 3000 m Aircraft net weight 4.6 ton
Flight range 15000 km Speed 250 km/h
Payload 0.7 ton Actual speed 200 km/h
Aircraft: Y-12
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Airborne measurements
0 100 200 300 400 5000.33
0.35
0.37
0.39
0 100 200 300 400 5000.3
0.330.350.370.39
0 100 200 300 400 5000.33
0.35
0.37
Time /S
Win
d Ra
tio
0 100 200 300 400 5000
100
200
300400
0 100 200 300 400 5000
100
200
300400
0 100 200 300 400 5000
100
200
300400
Head
ing
/Deg
ree
1.5km
2.0km
2.5km
cross section of wind ratio wind ratio with altitude
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OUC ORSI 24
Spaceborne Wind Lidar Simulation
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OUC ORSI 25
Simulated Wind Error
Spaceborne Wind Lidar Simulation
ALADIN Wind Error by ESA
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Conclusions
• Ground based Doppler lidar for measuring wind profile was developed.
• Mobile Doppler lidar was developed for wind profile and 3D wind field measurements.
• Airborne Doppler lidar for measuring wind profile was tested. • Simulation of spaceborne Doppler lidar was performed.
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Thank you for your attention!