Experimental comparison of coherent array detection and conventional coherent detection for laser radar and communications

1999 ◽  
Author(s):  
Jing Xu ◽  
Arnaud Delaval ◽  
R. Glenn Sellar ◽  
Ammar Al-Habash ◽  
Pete Reardon ◽  
...  
Keyword(s):  
Coherent Detection ◽  
Laser Radar ◽  
Experimental Comparison ◽  
Array Detection

Laser radar observations of middle-atmosphere structure and composition

1987 ◽  
Vol 323 (1575) ◽  
pp. 597-609 ◽  
Keyword(s):  
Middle Atmosphere ◽  
Resonance Scattering ◽  
Mie Scattering ◽  
Stratospheric Aerosol ◽  
Coherent Detection ◽  
Laser Radar ◽  
Temperature Structure ◽  
Selective Absorption ◽  
Aerosol Layer ◽  
Visible Wavelengths

A review is given of laser radar measurements of the atmosphere between about 5 and 100 km based on Rayleigh, Mie, Raman and resonance scattering processes, fluorescence and selective absorption. The results obtained with systems employing ultraviolet and visible wavelengths are examined in relation to the density and temperature structure at stratospheric and mesospheric heights, the changes in the stratospheric aerosol layer following the El Chichon eruption, the characteristics of particles in polar stratospheric clouds and of ice crystals in high-altitude cirrus clouds, and the height distributions of particular constituents. The use of infrared systems with coherent detection has, to date, been restricted to observations of Mie scattering from aerosols at heights up to the lower stratosphere. It seems likely that future developments will bring greater use of near- and middle-infrared wavelengths and probably space-borne laser radar systems.

How to Measure Discount Rates? An experimental comparison of three methods

2010 ◽  
Author(s):  
David J. Hardisty ◽  
Katherine J. Thompson ◽  
David H. Krantz ◽  
Elke U. Weber
Keyword(s):  
Experimental Comparison ◽  
Discount Rates
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