Results 141 to 150 of about 2,558,610 (193)
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Ozone differential absorption lidar algorithm intercomparison
Applied Optics, 1999An intercomparison of ozone differential absorption lidar algorithms was performed in 1996 within the framework of the Network for the Detection of Stratospheric Changes (NDSC) lidar working group. The objective of this research was mainly to test the differentiating techniques used by the various lidar teams involved in the NDSC for the calculation of
Peter von der Gathen +2 more
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Differential absorption lidar sensing of ozone
Proceedings of the IEEE, 1989The differential absorption lidar (DIAL) technique for deriving O/sub 3/ profiles from lidar measurements is discussed. The US National Aeronautics and Space Administration's airborne DIAL system is described, and examples of a broad range of O/sub 3/ and aerosol measurements are presented from a number of field experiments.
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Remote sensing of NO using a differential absorption lidar
Applied Optics, 1980Single-ended remote sensing measurements of atmospheric NO have been made using differential absorption of frequency-doubled pulsed CO(2) laser radiation backscattered from topographic targets. Returns were obtained from targets at ranges out to 1.4 km, and significant NO concentrations above ambient were observed over a path which crossed a traffic ...
N Menyuk, D K Killinger
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Differential absorption lidar signal averaging
Applied Optics, 1988This paper presents experimental results using an atmospheric backscatter dual CO(2) laser differential absorption lidar (DIAL). It is shown that DIAL signals can be averaged to obtain an N(-(1/2)) dependence decrease in the standard deviation of the ratio of backscattered returns from two lasers, where N is the number of DIAL signals averaged, and ...
W B, Grant, A M, Brothers, J R, Bogan
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Water Vapor Differential Absorption Lidar
2021Water vapor is one of the fundamental thermodynamic variables that define the state of the atmosphere. It is highly variable in space and time and influences many important processes related to weather and climate. For more than two decades the importance of water vapor profiling has been underscored by the research and operational weather communities.
Scott M. Spuler +2 more
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Coherent differential absorption lidar measurements of CO_2
Applied Optics, 2004A differential absorption lidar has been built to measure CO2 concentration in the atmosphere. The transmitter is a pulsed single-frequency Ho:Tm:YLF laser at a 2.05-microm wavelength. A coherent heterodyne receiver was used to achieve sensitive detection, with the additional capability for wind profiling by a Doppler technique.
Grady J, Koch +10 more
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Remote measurement of atmospheric mercury using differential absorption lidar [PDF]
Optics Letters, 1982 Atomic mercury in the atmosphere was detected by the differential-absorption lidar technique. Laser light at the mercury resonance wavelength of 253.65 nm was generated by anti-Stokes shifting in H(2) of the frequency-doubled output from a Nd:YAG-pumped dye laser.
Marcus Aldén, Hans Edner
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The reference range for differential absorption lidars
Optical and Quantum Electronics, 1980The concept of reference range for lidars is extended to the case of differential absorption lidars. A method for determining the wavelengths of operation, optimal from the point of view of maximum reference range for uniform and non-uniform absorbant distribution, is presented.
P. Richter, I. P�czeli
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Nonconventional coherent differential absorption lidar
SPIE Proceedings, 1992A new detection method is presented for detecting the weak optical signal scattered back from a topographic target. The weak signal arriving from a topographic target is amplified by the frequency modulated transmitter laser of the lidar system and the amplified signal is mixed with the frequency shifted transmitter laser beam.
I. Peczeli +4 more
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Frequency chirped differential absorption LIDAR
SPIE Proceedings, 2006We present a novel concept design of a differential absorption LIDAR for open path trace gas sensing in the atmosphere. To perform a range-resolved gas sensing we propose to arrange a set of retroreflectors in the laser beam path to measure a differential absorption in adjacent sections.
A. Lytkine, W. Jäger, J. Tulip
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