Method and apparatus for remote salinity sensing
US3992105A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 1975 |
| Grant date | Nov 16, 1976 |
| Priority date | — |
| Expiry date | Mar 10, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/21
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.