Method and laser apparatus for measuring visual range, slant vis

Details Method and laser apparatus for measuring visual range, slant vis Method and laser apparatus for measuring visual range, slant vis

1981-01-19

1985-03-05

Buczinski, S. C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356342, G01C 308, G01N 2100

Patent

active

045027820

ABSTRACT:
A laser echoe ranging device (lidar) is used both to measure cloud height and to measure slant range visibility. For the latter purpose at various elevation angles, the distance for which the echoe gets down to the noise level is measured by a counter and the echo voltage for a distance selected by a time switch is also stored, for example for various distances in 100 meter steps. These values can be used to compute the slant visual range and, with reference to the data for the different angles of elevation, also the layer structure of an inhomogeneous scattering characteristic of the atmosphere.

REFERENCES:
patent: 3510225 (1970-05-01), Collis
patent: 3519354 (1970-07-01), Brown, Jr. et al.
patent: 3782824 (1974-01-01), Stoliar et al.
"Lidar F/u/ r Umweltschutzaufgaben", Deutsche Forschungs-und Versuchsanstact F/u/ r Luft-und Raumfahrt e.V. Institut F/u/ r Physik Der Atmosphare, Jul. 4, 1979.
C. Werner, Optics & Laser Technology, Feb. 1981, vol. 13, No. 1, 356-5.

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