Modified three lobe search method

Details Modified three lobe search method Modified three lobe search method

2005-09-06

2005-09-06

Black, Thomas G. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Marine vehicle

C367S089000, C367S091000, C073S488000, C342S104000, C342S108000

Reexamination Certificate

active

06941196

ABSTRACT:
A method of finding a vertical velocity of a vehicle by first forming two cost functions from three pulse return times. An independently determined approximate vertical velocity and a Fletcher-Powell estimation technique are used on the first cost function, to select a minimum velocity of the first cost function. The selected minimum velocity, two calculated velocities from the selected minimum velocity, and a Fletcher-Powell estimation technique are used on the second cost function, to select a minimum velocity of the second cost function. The selected minimum velocity of the second cost function is taken as the vertical velocity of the vehicle.

REFERENCES:
patent: 4041293 (1977-08-01), Kihlberg
patent: 4244026 (1981-01-01), Dickey, Jr.
patent: 5381384 (1995-01-01), Winje
patent: 5422860 (1995-06-01), Bradley et al.
patent: 5440311 (1995-08-01), Gallagher et al.

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