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US 3,939,475 AGranted
Method of measuring range with large bistatic angle radar
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorBernard L. Lewis
Life of this patent
Estimating the term…
Abstract
Measurement of the range of a detected target is accomplished through utiation of a large bistatic-angle radar system having two transmitters used in conjunction with a receiver indicating the duration of received target forward-scattered signals from each transmitter.
Claims3
A large bistatic-angle radar system for determining the distance, R, of a target from a receiving means comprising:
- first and second transmitting means each adapted to transmit a radar signal of essentially the same frequency;
- said receiving means receiving and separately processing target forward-scattered signals from said first and second transmitting means, and for measuring the time durations T.sub.1 and T.sub.2 during which each said respective forward-scattered signal is received at a signal strength greater than a predetermined level below its maximum received signal strength;
- and,
- each said first and second transmitting means being spaced at a large bistatic-angle from said receiving means, said first transmitting means being spaced at a distance R.sub.1 from said receiving means, and said second transmitting means being spaced at a distance R.sub.2 from said receiving means wherein R.sub.1 is greater than R.sub.2 ;
- whereby the distance R is computed from the equation ##EQU12##
2 more elements
Dependencies are inferred from the claim text.