Results 251 to 260 of about 213,817 (308)

The coefficient of differential galactic absorption

, 1934
openaire   +1 more source

Continuous‐wave differential absorption lidar

Laser and Photonics Reviews, 2015
AbstractThis work proves the feasibility of a novel concept of differential absorption lidar based on the Scheimpflug principle. The range‐resolved atmospheric backscattering signal of a laser beam is retrieved by employing a tilted linear sensor with a Newtonian telescope, satisfying the Scheimpflug condition.
Liang Mei, Mikkel Brydegaard
exaly   +4 more sources

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Lidar differential absorption and scattering technique: theory

Applied Optics, 1983
The results of theoretical investigations of the differential absorption technique for sounding atmospheric water vapor are described in this paper. The sources of errors and their effect on the results of interpreting the sounding data are analyzed. The mathematical problems for inverting the lidar returns are considered.
Vladimir E Zuev, V V Zuev
exaly   +3 more sources

Remote sensing of NO using a differential absorption lidar

Applied Optics, 1980
Single-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
exaly   +3 more sources

Demonstration of differential backscatter absorption gas imaging

Applied Optics, 2000
Backscatter absorption gas imaging (BAGI) is a technique that uses infrared active imaging to generate real-time video imagery of gas plumes. We describe a method that employs imaging at two wavelengths (absorbed and not absorbed by the gas to be detected) to allow wavelength-differential BAGI.
Peter E Powers, Thomas J Kulp
exaly   +3 more sources

Differential-absorption photoacoustic imaging

Optics Letters, 2009
We present differential-absorption photoacoustic imaging, which detects the difference between transient and ground-state absorption, for contrast enhancement based on suppressing undesired objects. Two tubes were imaged. One contains a Pt(II) octaethylporphine (PtOEP) dye solution and serves as an object of interest, while the other contains an IR-783
Sheng-Wen, Huang, Janet F, Eary, Congxian, Jia, Lingyun, Huang, Shai, Ashkenazi, Matthew, O'Donnell   +5 more
openaire   +2 more sources

Differential absorption lidar signal averaging

Applied Optics, 1988
This 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
openaire   +2 more sources

Differential Optical Absorption Spectroscopy (DOAS) Measurements of Ozone in the 280–290 nm Wavelength Region [PDF]

Applied Spectroscopy, 1990
The differential absorption structure of the ozone spectrum between 250 and 330 nm has been investigated in order to determine the optimal wavelength region to be utilized for active differential optical absorption spectroscopy (DOAS) measurements ...
Hans Edner
exaly   +2 more sources