LIDAR
RESEARCHER: Dr. Jeffrey P. Thayer
RESEARCH ASSOCIATES: Dr. Weilin Pan, Dr. Andrew
Gerrard, Dr. Timothy Kane
MAILING ADDRESS: SRI International, Center for
Geospace Studies, 333 Ravenswood Avenue, Menlo Park, CA 94025
TELEPHONE NUMBER: 650-859-3557
FAX NUMBER: 650-322-2318
E-MAIL ADDRESS: thayer@sri.com
WEB SITE: http:// isr.sri.com/instruments/data/arclite/arclite.html
DATE: July 17, 2003
LIDAR LOCATION (CITY, COUNTRY, LAT., LONG.):
Sondrestrom, Greenland (67.0N, 309.1E)
SITE ELEVATION: 180 meters
PARAMETER(S) OR CONSTITUENT(S) MEASURED:
mesospheric sodium density
gravity waves
polar stratospheric clouds
RESEARCH OBJECTIVES:
Polar mesospheric wave structure and ion-neutral metal layer chemistry
SPONSOR: NSF
MEASUREMENT TECHNIQUE:
broadband resonance backscatter for sodium detection
MEASUREMENT RANGE: 10-40 km ; 80 – 110 km
VERTICAL RESOLUTION: 48 meter
FREQ. OF MEASUREMENT (TYPICALLY): 5-10 hours per
week, year round
MEASUREMENT TIMES (TYPICALLY): one-minute resolution,
day or night
LASER TYPE (s): Continuum NY81C, Nd:YAG frequency-doubled
pump source for a Continuum ND-60 Dye laser
WAVELENGTH: 589 nm
LASER ENERGY/PULSE: 100 mJ/pulse
PULSE REPETITION RATE: 10 Hz
RECEIVER SIZE AND CONFIGURATION: 92-cm diameter,
Newtonian
DETECTORS USED: Thorn EMI PMT
SIGNAL PROCESSING: photon counting
ANALOG-T0-DIGITAL CONVERTER: SR430 multichannel
scaler
COMPUTER: Pentium III PC-500 MHz
PUBLICATIONS (5 recent and/or significant):
Thayer, J.P., N.B. Nielsen, R. Warren, C.J. Heinselman,
and J. Sohn, "Rayleigh lidar system for middle atmosphere
research in the arctic," Opt. Eng.Vol. 36, No. 7, pp. 2045-2061,
1997.
Heinselman, C.J., J.P. Thayer, and B.J. Watkins,
"A high-latitude observation of sporadic sodium and sporadic
E layer formation," Geophys. Res. Lett. Vol. 25 , No. 16
, p. 3059, 1998.
Gerrard, A.J., T.J. Kane, J.P. Thayer, "Year-round
temperature and wave measurements of the Arctic middle atmosphere
for 1995-1998," Geophysical Monograph 123, Atmospheric Science
across the Stratopause, AGU, 2000.
Thayer, J. P., G. E. Thomas, and F.-J. Lübken,
Foreword: Layered phenomena in the mesopause region, J. Geophys.
Res., 108(D8), 8434, doi:10.1029/2002JD003295, 2003.
Thayer, J. P., M. Rapp, A. J. Gerrard, E. Gudmundsson,
and T. J. Kane, Gravity-wave influences on Arctic mesospheric
clouds as determined by a Rayleigh lidar at Sondrestrom, Greenland,
J. Geophys. Res., 108(D8), 8449, doi:10.1029/2002JD002363, 2003.
COMMENTS: This sodium resonance lidar has
been in routine operation since summer 1997.
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