Method and apparatus for remote salinity sensing

Details Method and apparatus for remote salinity sensing Method and apparatus for remote salinity sensing

1975-03-10

1976-11-16

Corbin, John K.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

356114, 356209, G01J 404

Patent

active

039921050

ABSTRACT:
Disclosed is an improved method and apparatus for remote sensing of the salinity of large bodies of water. Intensity values are simultaneously obtained for the horizontally and vertically polarized components of sunlight specularly reflected as a solar glitter pattern at a point on the surface of the body of water where the salinity is known. The aperture of the vertical polarization detection optical system is adjusted so that the signal voltage from that system is equal to that generated from the horizontal polarization detection optical system at that point. A signal whose amplitude corresponds to the change in salinity between another point and that known point on the surface is generated by multiplying the signal from the horizontal polarization detector by a function of the solar zenith angle and dividing the difference between the output from the horizontal polarization detector and a vertical polarization detector by this product.

REFERENCES:
patent: 3060793 (1962-10-01), Wells
patent: 3790286 (1974-02-01), Kraus
Born, M. and Wolf, E., "Principles of Optics," Pergamon Press, New York, 1959, p. 43.

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