Boots – shoes – and leggings
Patent
1992-01-14
1993-12-21
Chin, Gary
Boots, shoes, and leggings
364443, 364454, 342 63, 342 64, G06F 1550
Patent
active
052726398
ABSTRACT:
A terrain reference navigation system for an aircraft, surface vessel or subsurface vessel utilizing three sets of geo-physical correlation data. A kalman filter is used to correlate terrain data, electromagnetic data and gravimetric data with the output of a digital map of terrain, electromagnetic field and gravity. An optical disk stores the digitized data for sections of the globe. A Best of 3 selection process decides based on the errors in the kalman filter whether to accept the prediction of the terrain system, electromagnetic system or gravity system. An inertial navigation system uses the results of the Best of 3 selection to update aircraft, surface vessel or sub-surface vessel position and velocity and provide a more accurate positional estimate.
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The proceedings of the IEEE National Aerospace and Electronics Conference--NAECON, May 20-24, 1985 entitled The AFTI/F16 Terrain-Aided Navigation System, by D. D. Boozer, M. K. Lau, J. R. Fellerhoff, Sandia National Laboratories, Albuquerque, N.M. 87185, pp. 351-357.
Eric Skarman of SAAB Scandia AB Aerospace Division in a paper entitled Kalman Filter for Terrain-Aided Navigation, pp. 25.1-25.10.
Charles A. Baird and Mark R. Abramson in a paper entitled A Comparison of Several Digital Map-Aided Navigation Techniques, 1984, IEEE Journal, pp. 286-293.
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Carlos A. Bedoya in a paper entitled Terrain Aided Navigation Algorithms Survey, McDonnell Douglas Company B0697, Oct. 31, 1987, pp. 1-38.
Larry D. Hostetler and Ronald D. Andreas in a paper entitled Nonlinear Kalman Filtering Techniques for Terrain-Aided Navigation, IEEE Transactions on Automatic Control, vol. AC-28, No. 3, Mar. 1983, pp. 315-323.
Champion Ronald E.
Chin Gary
Honeywell Inc.
Lervick Craig J.
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