Boots – shoes – and leggings
Patent
1992-02-12
1994-04-05
Harvey, Jack B.
Boots, shoes, and leggings
364DIG1, 356354, 356359, 356361, 359195, 324 95, 324 96, 455 40, G02B 518, G02B 2756
Patent
active
053011279
ABSTRACT:
Radio-wave propagation is rapidly predicted by a hybrid computational method that uses Ray Optics techniques to calculate radio field strength above a limiting radio-wave ray, Parabolic Equation techniques to calculate radio field strength below the limiting radio-wave ray and below a predetermined altitude, and a newly created Extended Optics method to compute radio field strength in an area of the atmosphere below the limiting radio-wave ray and above the predetermined altitude. Rays in the extended optics area are initialized from the elevation angle that rays traced through the parabolic equation area make with the predetermined altitude. Where reflected, direct or origin created rays do not exist within the parabolic equation area, the elevation angle for the ray that does exist at the furthest range (optical limit) is used to initiate ray tracing in the extended optics area for ranges beyond the optical limit. Where the refractive index varies along the predetermined altitude, adjustments to the elevation angle used to initialize rays within the extended optics area are made. Propagation factors, determined through the Parabolic Equation method, are assigned to the rays traced through the extended optics area based upon the propagation factors in existence at the predetermined altitude. Field strength or propagation loss within the extended optics area is calculated from an interpolation between propagation factor values assigned to the extended optics rays.
REFERENCES:
patent: 4125893 (1978-11-01), Hitney et al.
Shkarofdky et al., Computer Modeling of Multipath Propagation: Review of -Tracing Techniques, Radio Science, vol. 17, No. 5, pp. 1133-1158, Sep.-Oct. 1982.
Dockery, Modeling Electromagnetic Wave Propagation in the Troposphere Using the Parabolic Equation, IEEE Transactions on Antennas & Propagation, vol. 36, No. 10, pp. 1464-1470, Oct. 1988.
Hitney et al., Tropospheric Radio Propagation Assessment, Proceedings of the IEEE, vol. 73, No. 2, pp. 265-283, Feb. 1985.
Ko, Harvey W. et al.; "Anomalous Microwave Propagation Through Atmospheric Ducts"; pp. 12-26; 1983; Laurel, MD.
"Propagation Modelling in the Troposhere: Parabolic Equation Method"; pp. 1136-1139; 1 Sep. 1988; United Kingdom.
Patterson, W. L. et al.; Engineer's Refractive Effects Prediction System (EREPS) Revision 2.0; Feb. 1990; San Diego, CA.
Ryan, F. J.; "RPE: A Parabolic Equation Radio Assessment Model"; 19-1-19-10; 15-19 May 1989; United Kingdom.
Craig, K. H. et al.; "A Forecasting System Using the Parabolic Equation-Application to Surface-to-Air Propagation in the Presence of Elevated Layers"; 20-1-20-13; 15-19 May 1989; United Kingdom.
Levy, M. F. et al.; "Assessment of Propagation Predictions Using Minisonde Refractivity Data and the Parabolic Equation Method"; 25-1-25-12; 15-19 May 1989; United Kingdom.
Craig, K. H. et al.; "Field Strength Forecasting with the Parabolic Equation: Wideband Applications"; pp. 461-465; 1989; United Kingdom.
Tappert, Fred D.; "The Parabolic Approximation Method"; Wave Propagation and Underwater Acoustics; Chapter V; 1977; New York, NY.
Fendelman Harvey
Harvey Jack B.
Keough Thomas G.
Lipovsky Peter A.
Shah Kamini
LandOfFree
High speed method for predicting radio-wave propagation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High speed method for predicting radio-wave propagation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High speed method for predicting radio-wave propagation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-517076