Measurement and presentation of acoustic target length and aspec

Details Measurement and presentation of acoustic target length and aspec Measurement and presentation of acoustic target length and aspec

1969-09-10

1976-09-14

Farley, Richard A.

Communications: electrical

Selective

Monitoring in addition to control

G01S 966

Patent

active

039809838

ABSTRACT:
The length (l) and aspect angle (.theta.) of an underseas target is detered by irradiating the target with a short sonar pulse and processing the echo pulse. Detection circuits operate upon the latter to provide the following target parameters: nearest-point range, R.sub.1 ; farthest-point range, R.sub.2, angle between transducer center line and nearest-range line, .phi..sub.1 ; angle between center line and farthest range line, .phi..sub.2. A computer is then programmed to operate upon these values and provide the length of the target (l) and its aspect angle (.theta.) as outputs. The outputs can be visually displayed on a CRT or on meter dials. The computer solves simple geometrical relationships to provide these outputs.

REFERENCES:
patent: 3174127 (1965-03-01), Haslett

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