Atmospheric Horizontal-Inhomogeneity Effects on the Optical Depths Determined by the Double-Elevation-Angle Lidar Technique

Paulson, M. R.

doi:10.21236/ada212836

Cited by 2 publications

(3 citation statements)

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“…Lidar measurements of atmospheric extinction and backscattering as a function of the zenith angle have been carried out in the past by Spinhirne et al 7 Their data indicate that at the time of measurements the atmosphere was horizontally homogeneous above 3 km, but inhomogeneous in the boundary layer. This is not surprising since these data were collected at widely spaced intervals of the zenith angle (which was varied from 00 to about 800).…”

Section: Fr-0215mentioning

confidence: 99%

Multiangle Lidar Performance in the Presence of Horizontal Inhomogeneities in Atmospheric Extinction and Scattering

Gutkowicz–Krusin¹

1992

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Section: Fr-0215mentioning

confidence: 99%

Multiangle Lidar Performance in the Presence of Horizontal Inhomogeneities in Atmospheric Extinction and Scattering

Gutkowicz–Krusin¹

1992

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“…In situations where the different layers of the atmosphere are horizontally homogeneous , the need for knowing the relat ionship be tween the backscatter and extinction coefficients can be eliminated by comparing the range compensated powers received from each altitude along two or more different elevation angles (Russel and Livingston, 1984;Paulson, 1989) . Assuming the atmosphere to be horizontally homogeneous with extinction and backscatter coe ffic ients , a (h) and fl(h) , respectively, , which vary only in the vertical direction, the powers …”

Section: Aerosol Sensing With Lidarsmentioning

confidence: 99%

“…However , the atmosphe re w i thin the convectively mixed marine boundary layer rarely, if ever, has the degree of homogeneity required. Paulson (1989) has recently conducted an investigation as to the usefulness of the two-angle lidar technique in a coastal region. In these studies, data were taken beneath a thin stratus cloud layer at about 500 meters.…”

Section: Similarlymentioning

confidence: 99%

Marine atmospheric effects on electro-optical systems performance

Richter

Hughes

1990

Propagation Engineering: Third in a Series

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For the past twelve years, a coordinated tn-service effort has been underway in the United States Department of Defense to provide an atmospheric effects assessment capability for existing and planned electro-optical (E0) systems. This paper reviews the exploratory development effort in the US Navy.A key responsibility for the Navy was the development of marine aerosol models. An initial model, the Navy Aerosol Model (NAN), was developed, tested, and transitioned into LOWTRAN 6. A more comprehensive model, the Navy Oceanic Vertical Aerosol Model (NOVAM), has been formulated and is presently undergoing comprehens ive evaluation and testing.Marine aerosols and their extinction properties are only one important factor in EO systems performance assessment. For many EO systems applications, an accurate knowledge of marine background radiances is required in addition to considering the effects of the intervening atmosphere. Accordingly, a capability was developed to estimate the apparent sea surface radiance for different sea states and meteorological conditions. Also, an empirical relationship was developed which directly relates apparent mean sea temperature to calculated mean sky temperature.In situ measurements of relevant environmental parameters are essential for real-time EO systems performance assessment. Direct measurement of slant path extinction would be most desirable. This motivated a careful investigation of lidar (light detection and ranging) techniques including improvements to singleended lidar profile inversion algorithms and development of new lidar techniques such as double-ended and dual-angle configurations. It was concluded that singleended, single frequency lidars can not be used to infer slant path extinction with an accuracy necessary to make meaningful performance assessments. Other lidar configurations may find limited application in model validation and research efforts. No technique has emerged yet which could be considered ready for shipboard implementation.A shipboard real-time performance assessment system was developed and named PREOS (Performance and Range for EO Systems). PREOS has been incorporated into the Navy's Tactical Environmental Support System (TESS). The present version of PREOS is a first step in accomplishing the complex task of real-time systems performance assessment. Improved target and background models are under development and will be incorporated into TESS when tested and validated. A reliable assessment capability can be used to develop Tactical Decision Aids (TDAs). TDAs permit optimum selection or combination of sensors and estimation of a ship's own vulnerability against hostile systems.368

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Atmospheric Horizontal-Inhomogeneity Effects on the Optical Depths Determined by the Double-Elevation-Angle Lidar Technique

Cited by 2 publications

References 0 publications

Multiangle Lidar Performance in the Presence of Horizontal Inhomogeneities in Atmospheric Extinction and Scattering

Multiangle Lidar Performance in the Presence of Horizontal Inhomogeneities in Atmospheric Extinction and Scattering

Marine atmospheric effects on electro-optical systems performance

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