ICLAS: International Coordination-group on Laser Atmospheric Studies
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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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