LIDAR RESEARCHER: Dr. Craig A. Tepley
RESEARCH ASSOCIATES: Dr. Jonathan S. Friedman, Dr. Shikha Raizada
MAILING ADDRESS: NAIC Arecibo Observatory, HC-03 Box 53995,
Arecibo, PR 00612
TELEPHONE NUMBER: (787) 878-2612
FAX NUMBER: (787) 878-1861
E-MAIL ADDRESS: craig@naic.edu
WEB SITE: http://www.naic.edu/~lidar
DATE: 15 August 2003
LIDAR LOCATION Arecibo, Puerto Rico, USA, 18.35 N., 66.75 W
SITE ELEVATION: 320 m
PARAMETER(S) OR CONSTITUENT(S) MEASURED: Ca, Ca + , Fe, Na,
K, mesopause-region temperature profiles
RESEARCH OBJECTIVES AND SPONSOR: Mesopause region chemistry,
climatology, waves and tides, sporadic atom and E layers,
sponsored by NSF and by NASA EPSCoR
MEASUREMENT TECHNIQUE:
MEASUREMENT RANGE: 80-120 km altitudes
VERTICAL RESOLUTION: 75 or 150 m
FREQ. OF MEASUREMENT (TYPICALLY): nighttime measurements monthly
during the week of the dark moon
MEASUREMENT TIMES (TYPICALLY): dusk to
dawn (1900-0630 in winter,
2000-0500 in summer)
LASER TYPE AND WAVELENGTH (s): Nd:YAG-pumped dye: 372, 393,
423 and 589 nm and Alexandrite: 770 nm
LASER ENERGY/PULSE: Nd:YAG-pumped dye:
20-100 mJ and Alexandrite:
100 mJ
PULSE REPETITION RATE: Nd:YAG-pumped dye: 50 Hz) and Alexandrite:
30 Hz
RECEIVER SIZE AND CONFIGURATION: 4 independent 80 cm fiber-coupled
cassegrain telescopes
DETECTORS USED: GaAs Hamamatsu and S20 EMI photomultipliers
SIGNAL PROCESSING: photon counting, resonance fluorescence measurement
for temperatures
ANALOG-T0-DIGITAL CONVERTER: EG&G Turbo
MCS
COMPUTER: PC Win 98
PLATFORM (if applicable):
PUBLICATIONS (5 recent and/or significant):
Friedman, J. S., Tropical Mesopause
Climatology over the Arecibo Observatory, Geophys. Res. Lett. , 30 (12),
1642, doi:10.1029/2003GL016966, 2003.
Raizada, S., and C. A. Tepley, Seasonal variation of mesospheric
Iron layers at Arecibo: First results from low-latitudes ,
Geophys. Res. Lett., 30 , 2, 1082, doi:10.1029/2002GL016537,
2003.
Tepley, C. A., S. Raizada, Q. H. Zhou, and J. Friedman,
Observations of Ca + , K, and Electron Density using Lidar and
Incoherent Scatter Radar at Arecibo, Geophys. Res. Lett. , 30 (1),
1,009, 2003.
Raizada, S., and C. Tepley, Iron Boltzmann
Lidar Temperature and Density Observations from Arecibo - An
Initial Comparison with Other Techniques, Geophys. Res. Lett. , 29 (12),
1-1:1-4, 2002.
Collins, S. C., J. M. C. Plane, M. C. Kelley,
T. G. Wright, P. Soldán, T. J. Kane, A. J.
Gerrard, B. W. Grime, R. J. Rollason, J. S. Friedman,
S. A. González, Q. Zhou, M. P. Sulzer,
and C. A. Tepley, A study of the role of ion-molecule chemistry
in the formation of sporadic sodium layers, J. Atmos. Terr.
Phys. , 64 , 845-860, 2002.
COMMENTS:
Na resonance lidar observations began in 1998 with the Coqui
II campaign.
K resonance density measurements began in 1999, temperatures
in 2001.
Fe measurements were made beginning in 2001.
Ca and Ca + measurements began in 2002.
We can now measure 3 simultaneous metals: K plus any two of
Na, Ca, Ca + , and Fe, along with temperatures.
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