LIDAR RESEARCHER:
Dr. David M. Tratt
RESEARCH ASSOCIATES: Gary D. Spiers, Meng P. Chiao,
David A. Haner, Robert T. Menzies
MAILING ADDRESS: Jet Propulsion Laboratory, 4800
Oak Grove Drive, MS 168-214, Pasadena, CA 91109-8099.
TELEPHONE NUMBER: +1-818-354-2750
FAX NUMBER: +1-818-393-6984
E-MAIL ADDRESS: dtratt@jpl.nasa.gov
WEB SITE: http://www.jpl.nasa.gov/lidar
DATE: August 14, 2001
LIDAR LOCATION (CITY, COUNTRY, LAT., LONG.): Pasadena,
Calif., USA; 34o
12' N; 118o 10' W.
SITE ELEVATION: 390 m MSL
PARAMETER(S) OR CONSTITUENT(S) MEASURED: Aerosol/cloud
backscatter; atmospheric wind field.
RESEARCH OBJECTIVES AND SPONSOR: Development of
lidar instrumentation for planetary science, sponsored by NASA
Office of Space Science; atmospheric backscatter profiles in support
of EOS Terra/MISR cal/val.
MEASUREMENT TECHNIQUE: Modulated cw Doppler lidar
at 1.5 microns; pulsed coherent lidar at 10.6 microns.
MEASUREMENT RANGE: 1 km (winds); 20 km (backscatter).
VERTICAL RESOLUTION: 200 m
FREQ. OF MEASUREMENT (TYPICALLY): Ephemeral.
MEASUREMENT TIMES (TYPICALLY): late-morning/mid-afternoon.
LASER TYPE AND WAVELENGTH (s): InGaAs/EDFA at
1.5 microns; TEA carbon dioxide at 10.6 microns.
LASER ENERGY/PULSE: 1.5 J (10.6 microns)
PULSE REPETITION RATE: 0.1 Hz (anticipating upgrade
to 4 Hz).
RECEIVER SIZE AND CONFIGURATION: 15 cm; bistatic
coherent transceiver.
DETECTORS USED: InGaAs pin; HgCdTe photoconductive.
SIGNAL PROCESSING: I/Q digitization; single-pulse
storage capability.
ANALOG-TO-DIGITAL CONVERTER: DSP/CAMAC.
COMPUTER: PC/LabView.
PLATFORM (if applicable): N/A
PUBLICATIONS (5 recent and/or significant):
R. T. Menzies and D. M. Tratt: Evidence of seasonally
dependent stratosphere-troposphere exchange and purging of lower
stratospheric aerosol from a multiyear lidar data set. J. Geophys.
Res., 100(D2), 1995, 3139-3148.
D. M. Tratt and R. T. Menzies: Evolution of the
Pinatubo volcanic aerosol column above Pasadena, California observed
with a mid-infrared backscatter lidar. Geophys. Res. Lett., 22(7),
1995, 807-810.
R. T. Menzies and D. M. Tratt: Airborne lidar
observations of tropospheric aerosols during the GLOBE Pacific
circumnavigation missions of 1989 and 1990. J. Geophys. Res.,
102(D3), 1997, 3701-3714.
R. B. Husar, D. M. Tratt, B. A. Schichtel, S.
R. Falke, F. Li, D. Jaffe, S. Gassó, T. Gill, N. S. Laulainen,
F. Lu, M. C. Reheis, Y. Chun, D. Westphal, B. N. Holben, C. Geymard,
I. McKendry, N. Kuring, G. C. Feldman, C. McClain, R. J. Frouin,
J. Merrill, D. DuBois, F. Vignola, T. Murayama, S. Nickovic, W.
E. Wilson, K. Sassen, N. Sugimoto, and W. C. Malm: Asian dust
events of April 1998. J. Geophys. Res., 106(D16), 2001, 18317-18330.
D. M. Tratt, R. J. Frouin, and D. L. Westphal:
April 1998 Asian dust event: A southern California perspective.
J. Geophys. Res., 106(D16), 2001, 18371-18380.
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