RESEARCH ASSOCIATES: David O. Miller, Sangwoo Lee, Stephen P. Palm, Keith D. Evans, Belay B. Demoz, David N. Whiteman, Bruce M. Gentry, Thomas D. Wilkerson, David V. Guerra

MAILING ADDRESS: Code 912, NASA GSFC, Greenbelt, MD 20771 USA

TELEPHONE NUMBER: 301-614-5768

FAX NUMBER: 301-614-5492

E-MAIL ADDRESS: geary.schwemmer@gsfc.nasa.gov

WEB SITE: http://rsd.gsfc.nasa.gov/912/code912/personnel/Mr.Geary.K.Schwemmer/resume.html

DATE: 23 August 2001

LIDAR LOCATION (CITY, COUNTRY, LAT., LONG.): Greenbelt, MD, USA, 39.00 N, 76.85 W

SITE ELEVATION: 60 m ASL

PARAMETER(S) OR CONSTITUENT(S) MEASURED: PBL heights, cloud and aerosol profiles (1064 nm backscatter), wind profiles

RESEARCH OBJECTIVES AND SPONSOR: advanced lidar technologies, sponsored by NASA and IPO, boundary layer dynamics sponsored by NASA

MEASUREMENT TECHNIQUE: elastic backscatter, winds by scattering structure motions.

MEASUREMENT RANGE: 30 km

VERTICAL RESOLUTION: 20 meters

FREQ. OF MEASUREMENT (TYPICALLY): occasional, field experiments

MEASUREMENT TIMES (TYPICALLY): day/night

LASER TYPE AND WAVELENGTH (s): Nd:YAG 1064 nm

LASER ENERGY/PULSE: 1 mJ

PULSE REPETITION RATE: 5 kHz

RECEIVER SIZE AND CONFIGURATION: 40 cm diameter, conical scanning HOE

DETECTORS USED: Geiger mode APD

SIGNAL PROCESSING: all digital

ANALOG-T0-DIGITAL CONVERTER:

COMPUTER: IBM PC

PLATFORM (if applicable): airborne and mobile ground-based

PUBLICATIONS (5 recent and/or significant):
"Ground Based Operational Testing of Holographic Scanning Lidars," Schwemmer, Geary K., Thomas D. Wilkerson, Jason A. Sanders, David V. Guerra, David O. Miller, Stephen E. Moody, Advances in Laser Remote Sensing, Alain Dabas, Claude Loth and Jacques Pelon, Editors, pp. 69-72, Ecole Polytechnique, publisher, France, 2001.

"The Use of Raman Lidar in Cloud Studies," Whiteman, D. N, G. Schwemmer, D. O'C. Starr, K. D Evans, B. Demoz, T. Berkoff, S. H. Melfi, M. Cadirola, G. J. Jedlovec, Advances in Laser Remote Sensing, Alain Dabas, Claude Loth and Jacques Pelon, Editors, pp. 271-274, Ecole Polytechnique, publisher, France, 2001.

"Holographic Optical Telescope and Scanner (HOTS) for Lidar Applications," Guerra, David V., G. K. Schwemmer, T. D. Wilkerson, SPIE's International Technical Group Newsletter on Holography, Vol. 11, No. 1, p.5, June 2000.

"Pressure Measurement using an Airborne Differential Absorption Lidar. Part I: Analysis of the Systematic Error Sources", Flamant, C. N., G. K. Schwemmer, C. L. Korb, K. D. Evans, and S. P. Palm, J. Atmos. and Oceanic Tech., Vol. 16, 5, 561-574, 1999.

"Prototype Holographic Atmospheric Scanner for Environmental Remote Sensing ", Guerra, D. V., A. D. Wooten, Jr., S. S. Chaudhuri, G. K. Schwemmer, and T. D. Wilkerson, J. Geophysical Research, Vol. 104, No. D18, 22,287-22,292, 1999.