Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1982-01-08
1985-08-06
Blum, Theodore M.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343 5DP, 343463, 343386, 364456, 364460, G01S 168, G01F 1550
Patent
active
045339180
ABSTRACT:
A device working in conjunction with commercial-grade radar equipment for accurately pinpointing the location of a target or a topological feature with a precision greatly superior to the specified resolution of the radar equipment.
This high precision is obtained through on-line treatment of the radar echo signals as the radar scans the target area.
In the preferred embodiment of the invention, the device is used for assisting a pilot in steering a ship navigating through coastal or inland waterways. The device provides statistically weighted data relative to the location of a plurality of landmarks in the vicinity of the ship to a KALMAN filter-type circuit which in turn generates an accurate state vector reflecting the ship's present and near future movement.
In the course of an initial surveying pass through the waterway, the device can also generate reference charts of the area to be traveled.
The device can also be applied to other types of surveying tasks, to the implementation of anti-collision apparatuses, and to other systems requiring a high degree of precision in the measurement of surrounding objects.
REFERENCES:
patent: 3659085 (1972-04-01), Potter et al.
patent: 3869601 (1975-03-01), Metcalf
patent: 3974328 (1976-09-01), Thomas et al.
patent: 4117482 (1978-09-01), Jepsky et al.
patent: 4163972 (1979-08-01), Lapy et al.
patent: 4179693 (1979-12-01), Evans
patent: 4232313 (1980-11-01), Fleishman
Barron Jr. Gilberto
Blum Theodore M.
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