초록 ▼

A system of ocean depth sounding from the air which consists in projecting an infrared beam (2) down normal to the ocean surface along a forward travel path to backscatter a signal to a receiver (10) to measure distance to the ocean surface, and simultaneously projecting down a green beam (1) to swe

A system of ocean depth sounding from the air which consists in projecting an infrared beam (2) down normal to the ocean surface along a forward travel path to backscatter a signal to a receiver (10) to measure distance to the ocean surface, and simultaneously projecting down a green beam (1) to sweep across the direction of travel to backscatter a series of signals from the ocean bottom over an extended width to a second receiver (11), adjusting the receiver gain from the green signal to achieve optimum ocean bottom measurement and calculating ocean depth from the infrared and green signal differential.

대표청구항 ▼

The method of ocean depth sounding from the air by laser beam which comprises the following steps: (a) directing two laser beams of different wavelengths downwardly from an aircraft, one a beam in the green spectrum traversed laterally across the flight path of the aircraft to detect the ocean botto

The method of ocean depth sounding from the air by laser beam which comprises the following steps: (a) directing two laser beams of different wavelengths downwardly from an aircraft, one a beam in the green spectrum traversed laterally across the flight path of the aircraft to detect the ocean bottom, the other a vertical stable beam in the infrared spectrum to detect the ocean surface (b) receiving the reflected infrared surface signal and the reflected green ocean bottom signal in separate-receivers, (c) processing the data from the red beam reflections to determine ocean surface distance and to generate a timing datum for depth measurement, (d) adjusting the dynamic range of the green receiver, for optimum reception of the bottom return signal which decreases exponentially in amplitude with increasing depth, and (e) processing the data from the green beam to determine the ocean depth by measuring the differential time between the two reflected signals.