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| Number | Title | Issue Date |
| 7187619 | Method and apparatus for high-frequency passive sonar performance prediction A system and method for predicting passive, high-frequency sonar array performance at any underwater location, implemented as a software package running on a computer. An operator selects an arbitrary geographical location, specifies a sonar array and defines a targ... | 03/06/2007 |
| 7139397 | Hybrid architecture for realizing a random numbers generator A hybrid architecture for realizing a random numbers generator comprising a digital circuitry portion able to provide for a random bytes sequence as well as an analog circuitry portion able to provide a seed of the true random type is described. ... | 11/21/2006 |
| 7010279 | Radio frequency integrated circuit electro-static discharge circuit The radio frequency integrated circuit (RFIC) electrostatic discharge (ESD) circuit includes a transformer balun, an impedance matching circuit and a clamping circuit. The balun is operably coupled to transpose a single-ended radio frequency (RF) signal and differen... | 03/07/2006 |
| 6109614 | Remote sensing apparatus of supersonic projectile A remote targeting apparatus and method comprising surrounding a projectile target with a sensor array, computing projectile impact data, transmitting the data receiving the data at a controller; and displaying information corresponding to the data. RF tr... | 08/29/2000 |
| 5268875 | Acoustic decoy A sonar countermeasure comprising a decoy device that carries apparatus for eceiving, processing and transmitting sonar signals. Processing apparatus includes magnetic tape storage, staggered record and read heads and time varying partial erase heads which... | 12/07/1993 |
| 4954996 | Navigation sonar system dockside simulator A simulator of bottom return signals for a sonar system on a moving ship generates pulsed frequency modulated signals to simulate ocean bottom returns. Signals from the sonar transmitter are stretched in accordance with a postulated bottom configuration a... | 09/04/1990 |
| 4908800 | Multi-channel acoustic simulator A plurality of hydrophone output signals representative of an ocean bottom re simulated to test a receiver of the sonar sounding system. The phase shift of the output of each hydrophone at each snapshot is determined along with the amplitude. This informat... | 03/13/1990 |
| 4795626 | 99m Tc.sup.(III) myocardial imaging agents which are non-reducable in vivo A cationic 99m TcIII myocardial imaging agent is disclosed which has a relatively negative redox potential. This prevents in vivo reduction of the Tc(III) to Tc(II). The redox potential of the Tc(III) is controlled by complexing the ... | 01/03/1989 |
| 4626217 | Broadband doppler simulator A broadband doppler simulator is described in which signals from a plurality of hydrophones are simulated by selecting storage addresses of a random access memory whose successive addresses contain samples of an input signal. The range of each hydrophone ... | 12/02/1986 |
| 4386913 | Pseudo-random noise generated target simulator A target simulator tests the characteristics of a multi-element array witt the use of large memories and long delay line storage. The simulator includes a master clock which provides the count frequency to a binary counter. The reading of the binary coun... | 06/07/1983 |
| 4200859 | Device for simulating marine craft noises 1. In combination in electronic apparatus for simulating the self-noise of submarine, means for generating a wide-band noise signal, means for modulating the noise signal at a frequency corresponding to the propeller speed of a submarine, means for genera... | 04/29/1980 |
| 4198703 | Submarine simulating sonar beacon 1. In a submarine simulation sonar beacon adapted for predetermined maneuing under water, a hull having a forward and an aft transducer for receiving an acoustical signal within said water, means disposed in said hull connected to said forward and aft tr... | 04/15/1980 |
| 4034483 | Sonar beamforming apparatus simulation This disclosure describes apparatus for generating electrical signals which simulate the signals actually used by most sonar systems to indicate direction from which the sounds are received. In many passive sonar systems, arrays of hydrophones receive und... | 07/12/1977 |
