Interferometeric lightning ranging system

Details Interferometeric lightning ranging system Interferometeric lightning ranging system

1986-08-18

1989-01-31

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Directive

Position indicating

342453, 342387, G01J 302

Patent

active

048019429

ABSTRACT:
The lightning ranging system for determining distance between a lightning discharge and an airborne object includes a receiver on the airborne object adapted to receive electromagnetic radiation signals generated by a lightning discharge along both a direct and a surface reflected path. Signal processing apparatus is interconnected with the receiver for determining the difference in the time of arrival of the direct and reflected signals. A computer is provided to calculate the range of the lightning discharge from the difference in the time of arrival of the direct and reflected signals. In a preferred embodiment, the signal processing apparatus is digital and includes at least a 10-bit analog-to-digital converter with at least a 36 megahertz sampling rate.

REFERENCES:
patent: 3369240 (1968-02-01), Leary
patent: 3483559 (1969-12-01), Korzekwa et al.
patent: 3727225 (1973-04-01), Adrian
patent: 4543580 (1985-09-01), Bent et al.
patent: 4684951 (1987-08-01), Baumer
Rudolf F. Graf, Modern Dictionary Of Electronics, Howard W. Sams & Co., Inc., Fourth Edition, 1972, p. 294.

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