Results 171 to 180 of about 897 (203)

Water vapor micropulse differential absorption lidar

SPIE Proceedings, 1999
By combining the capability of a differential absorption lidar (DIAL) and the excellent characteristics of a micro pulse lidar (MPL) we have designed and tested a micro pulse DIAL system, which could be operated from the ground or airborne platform, to monitor the atmospheric water vapor mixing ratio.
Choonghoon Oh, Coorg R. Prasad, Victor A. Fromzel, In H. Hwang, John A. Reagan, Hui Fang, Manuel Rubio   +6 more
openaire   +1 more source

Effect of pulse-pair correlation on differential absorption lidar

Applied Optics, 1985
Calculations are presented of the effect of pulse-pair correlation on the detection statistics of alarm systems using differential absorption lidar (DIAL) for the remote sensing of toxic gases. This experimentally observed correlation is found to have a significant beneficial effect on the performance of such systems. The calculations are performed for
openaire   +2 more sources

Doppler spectral scanning differential absorption lidar

SPIE Proceedings, 2002
Preliminary experiments toward the implementation of Doppler spectral scanning differential absorption lidar (DSS DIAL) are described. In separate tests, CO2 laser pulses were reflected from either a ground-based retroreflector (36-km round-trip distance) or a retroreflector on the GEOS-3 satellite (approximately 2000-km round-trip distance).
Bradley M. Jost, Daniel C. Senft, Diego F. Pierrottet, Mark A. Kovacs, Joe C. Cardani   +4 more
openaire   +1 more source

Differential Absorption Lidar Measurements of Tropospheric Ozone

Laser Applications to Chemical Analysis, 1994
Ozone is one of the most important trace species in the atmosphere and the focus of several important environmental issues. Most ozone resides in the stratosphere where it plays a critical role in protecting the biosphere from harmful solar ultraviolet radiation.
Andrew O. Langford, Michael H. Proffitt
openaire   +1 more source

Laser prf considerations in differential absorption lidar applications

Applied Optics, 1983
Laser pulse repetition frequency (prf) is a major factor in determining the performance of differential absorption lidar (DIAL) systems. The effects of laser prf on concentration measurement accuracy and maximum usable range are quantified. Heterodyne-detection (coherent) and direct-detection (noncoherent) as well as path-averaged and range-resolved ...
openaire   +2 more sources

Multiple wavelength differential absorption lidar evaluation

Acta Physica Hungarica, 1984
Algorithms are shown for the interpretation and evaluation of multiple wavelength differential absorption lidar data for cases when only limited information is available about the molecular components present prior to the measurement. Experimental data are modeled by computer simulation of measurement, errors and reliability of the measurements are ...
T. I. Tarnóczi, P. Richter
openaire   +1 more source

Numerical simulation for differential absorption lidar system

SPIE Proceedings, 2007
In the recent years, the most country in the word attach importance to the environmental and the protection of environmental doubly. The differential absorption lidar (DIAL)operating in the infrared wavelengths is a powerful standoff sensor for rapid remote detection of chemical emissions.
WeiRan Wang, ShiRong Yin
openaire   +1 more source

Differential-Absorption Lidar for Water Vapor and Temperature Profiling

2006
The application of differential absorption lidar to narrow lines of the rotational-vibrational spectrum of water vapor or oxygen for humidity and temperature profiling is technically demanding with respect to the laser source and the data acquisition. Many details need to be considered carefully in system design and data evaluation.
openaire   +2 more sources

Infrared Differential Absorption Lidar for Vapor Detection

1988
Abstract : Ground-mobile and airborne carbon dioxide laser systems were developed to measure vapor clouds using differential absorption lidar (DIAL) techniques. Field testing with the ground-mobile lidar detected a vapor cloud at 7 km using the return signal from a topographic target at a range of 8.5 km.
P. L. Holland, E. E. Uthe, J. van der Laan, K. R. Phelps, J. P. Carrico   +4 more
openaire   +1 more source

Probing Air Pollutants by Differential Absorption LIDAR

1992
Air pollution is related with numerous different physical, chemical and meteorological phenomena. So, the atmospheric equilibrium depends on hundreds of chemical species, but only few of them are directly emitted and considered as main pollutants. All the others are trace constituents, being nevertheless of outstanding importance for the chemical ...
H. J. Kölsch, P. Rairoux, J. P. Wolf, L. Wöste   +3 more
openaire   +1 more source