Apparatus for and method of remotely sensing sub-surface water t

Details Apparatus for and method of remotely sensing sub-surface water t Apparatus for and method of remotely sensing sub-surface water t

1987-06-22

1989-09-19

Rosenberger, Richard A.

Optics: measuring and testing

By particle light scattering

With photocell detection

356 43, 374117, G01B 902, G01K 1122

Patent

active

048675644

ABSTRACT:
The subsurface temperature of a body of water such as an ocean is measured remotely by directing a laser beam deeply into the water and analyzing the resultant Brillouin and Rayleigh backscatter components. Wavelength shifted Brillouin scatter is mixed with the unshifted Rayleigh scatter in a self-heterodyne manner for each volume element of illuminated water and the frequency of the heterodyne signal is measured. This produces the desired temperature-depth profile of the water.

REFERENCES:
patent: 3474253 (1969-10-01), Kessler
patent: 4123160 (1978-10-01), Caputo et al.
patent: 4411525 (1983-10-01), Ogawa
Speed of Sound & Temperature in the Ocean by Brillouin Scattering, by Joseph G. Hirschberg, et al., Applied Optics/vol. 23, No. 15, 8/1/84 pp. 2624-2628, inclusive.

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