LIDAR RESEARCHER:
Dr. Andrew Y. S. CHENG
RESEARCH ASSOCIATES:
Dr. Peter Voelger, Dr. Andrew Walton, Dr. Zhu Jianhua
MAILING ADDRESS: Department of Physics and Materials Science,
City University of Hong Kong, 83 Tat Chee Ave., Kowloon, Hong
Kong, China
TELEPHONE NUMBER: (852) 2788-7810
FAX NUMBER: (852) 2788-7830
E-MAIL ADDRESS: apaysc@cityu.edu.hk
WEB SITE: http://
DATE: 13th August, 2001
LIDAR LOCATION (CITY, COUNTRY, LAT., LONG.): Hong
Kong, China
LAT = 22 deg 20 min N, LONG = 114 deg 10 min E
SITE ELEVATION: 67m
PARAMETER(S) OR CONSTITUENT(S) MEASURED: Aerosol
extinction vertical profiles
RESEARCH OBJECTIVES AND SPONSOR:
Urban aerosol, pollution transports, internal boundary layer heights
MEASUREMENT TECHNIQUE: Mie Lidar
MEASUREMENT RANGE: 3 to 5 km range
VERTICAL RESOLUTION: 3 to 12 m
FREQ. OF MEASUREMENT (TYPICALLY):
weekly
MEASUREMENT TIMES (TYPICALLY):
afternoon
LASER TYPE AND WAVELENGTH (s):
NdYAG 532nm
LASER ENERGY/PULSE:
75mJ
PULSE REPETITION RATE:
10Hz
RECEIVER SIZE AND CONFIGURATION:
14-inch diameter coaxial design
DETECTORS USED:
PMT
SIGNAL PROCESSING:
ANALOG-T0-DIGITAL CONVERTER:
12bit at 100MHz
COMPUTER:
PC
PLATFORM (if applicable):
Windows 98
PUBLICATIONS (5 recent and/or significant):
1. Andrew Y. S. Cheng, H. Liu, J. C. L. Chan,
and F. W. L. Fong, Numerical simulation and lidar measurements
of the internal boundary layer evolution over Hong Kong urban
area. In Proceedings of 15th International Congress of Biometeorology
& International Conference on Urban Climatology, Sydney, Australia,
8-12 November, 1999.
2. Cheng, A. Y. S., H. Liu and J. C. L. Chan, 1999: Lidar Observation
of Atmospheric Processes in Hong Kong (invited paper), Proc. Int.
Laser Sensing Symposiun-ILSS'99, Fukui, Japan, 6-8 September,
p67-70.
3. Andrew Y. S. Cheng, S. W. Tsang and Jianhua Zhu, 2000: Studies
of the spatial correlation between urban aerosols and local traffic
congestion using a slant angle scanning Mie Lidar system. In the
SPIE's 2nd International Asia-Pacific Symposium on Remote Sensing
of the Atmosphere, Environment and Space, October 9-12, 2000,
242-249, Sendai, Japan.
4. Andrew Y. S. Cheng, C. Y. Pau and S. W. Tsang, 2000: Monitoring
of Urban Aerosol below the Boundary Layer using a Volume Scanning
Mie Lidar. In the 20th International Laser Radar Conference, July
10-14, 2000, Vichy, France.
5. Liu H. P., J. C. L. Chan and A. Y. S. Cheng, 2001: Internal
boundary layer structure under sea-breeze conditions in Hong Kong.
Atmos. Environ., Vol. 35, 683-692.
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