Boots – shoes – and leggings
Patent
1995-06-08
1996-06-11
Teska, Kevin J.
Boots, shoes, and leggings
364449, G05D 100
Patent
active
055262600
ABSTRACT:
A device executing intervisibility calculation includes a mechanism executing a radial spoke scan pattern where individual radials are traversed beginning at a threat installation and extending outward along a radial to a distance corresponding to threat range capability. Intervisibility calculation is simplified to allow implementation in a simple, dedicated hardware engine to provide rapid execution time while ensuring accurate intervisibility results. The intervisibility engine includes lookup tables to provide precalculated data and advantageously avoids divide operations whereby the intervisibility calculation may be executed by use of a series of adds, subtracts, and multiplies relative to intervisibility data developed while traversing a given radial. The engine calculates a slope for each data post visited in traversing a radial, and identifies a data post as being visible when its associated slope is greater than a previously encountered greatest magnitude slope. The engine stores in a digital terrain elevation database an intervisibility ground reference value representing a magnitude of vertical clearance between a given data post elevation and a threat detection envelope thereabove. The execution time provided by the intervisibility engine of the present invention is sufficiently fast to allow dynamic, in-flight calculation to aid in intervisibility calculation relative to a just discovered or just moved threat installation. The digital terrain elevation data may be referenced to display or select routes relative to known or detected threat installations.
REFERENCES:
patent: 3909605 (1975-09-01), Rowe et al.
patent: 4760396 (1988-07-01), Barney et al.
patent: 4855937 (1989-08-01), Heartz
patent: 4882590 (1989-11-01), Huss et al.
patent: 4884220 (1989-11-01), Dawson et al.
patent: 4903216 (1990-02-01), Huss et al.
patent: 4964723 (1990-10-01), Murgue et al.
patent: 4985854 (1991-01-01), Wittenburg
patent: 5086396 (1992-02-01), Waruszewski, Jr.
patent: 5136512 (1992-08-01), Le Borne
patent: 5179638 (1993-01-01), Dawson et al.
patent: 5282013 (1994-01-01), Gregoris
patent: 5309522 (1994-05-01), Dye
Proceedings of the SPIE--The Int'l Society for Optical Engineering, 1993, USA, vol. 1955, ISSN 0277-786-X, pp. 318-323, Real-Time Inter Visibility Calculations for Ground-Based Radar Systems, Libby, V. et al.
IBM Technical Disclosure Bulletin, vol. 34, No. 2, Jul. 1991, New York, US, pp. 61-66, Three-Dimensional Intervisibility Algorithm, Anonymous.
IBM Technical Disclosure Bulletin, vol. 37, No. 1, Jan. 1994, New York, US, pp. 649-652, Terrain Exposure Factor, Anonymous.
Kodet Thomas A.
Stoffer Marie A.
Thorpe Douglas E.
Cushing Keith A.
Honeywell Inc.
Johnson Kenneth J.
Teska Kevin J.
Walder, Jr. Stephen J.
LandOfFree
Device executing intervisibility calculation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device executing intervisibility calculation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device executing intervisibility calculation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-358206