| Patents for G01S 3 - Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received (11,105) |
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| 12/28/1989 | DE3218833A1 Direction finding device, particularly an acoustic underwater direction finding device |
| 12/27/1989 | EP0348363A2 Amplitude comparison ultrasound receiver for localizing submarine sound sources |
| 12/26/1989 | US4889984 Radiation detector arrays having reduced number of signal paths |
| 12/20/1989 | EP0346985A2 Target detection systems |
| 12/19/1989 | US4888593 Time difference of arrival geolocation method, etc. |
| 12/19/1989 | US4887781 Transmitters |
| 12/13/1989 | EP0345320A1 A method to detect radiation and measure its angle of incidence and a detector arrangement to carry out the method. |
| 12/12/1989 | US4886330 Infra red imaging system |
| 12/06/1989 | EP0344364A2 Detector device |
| 12/05/1989 | CA1263734A1 Sonar apparatus |
| 11/30/1989 | DE3817169A1 Method and device for correcting acceleration-induced errors in angular position measurements |
| 11/22/1989 | CN1037399A Method and device in antenna and receiving system of radio theodolite |
| 11/16/1989 | DE3815373A1 Method for determining the location of objects |
| 11/15/1989 | EP0342016A2 Optical position measurement |
| 11/14/1989 | US4881080 Apparatus for and a method of determining compass headings |
| 11/14/1989 | US4881078 Tracking system with beam switching antenna |
| 11/14/1989 | US4880305 Laser direction of arrival detector |
| 11/09/1989 | DE3248459A1 Acoustic underwater antenna |
| 11/08/1989 | EP0341142A2 Observation method including the scanning of a celestial body and the measurement of the angular velocity of a space vehicle, observation system for its application and space vehicle provided with this system |
| 11/07/1989 | USH712 Method of stellar navigation using an optical correlator |
| 11/07/1989 | USH710 Horizon reference system for a rotating body |
| 11/07/1989 | US4879694 Difar demultiplexer circuit |
| 11/02/1989 | EP0339242A2 Method and device in the antenna and receiving system of a radio theodolite |
| 10/31/1989 | US4877959 Space photon source locator |
| 10/25/1989 | EP0338687A2 Method of and apparatus for returning an earth orbiting spacecraft to an earth pointing attitude after displacement therefrom |
| 10/24/1989 | US4876549 Discrete fourier transform direction finding apparatus |
| 10/24/1989 | US4875646 Aircraft navigation systems |
| 10/19/1989 | DE3907664A1 Bildaufnahmeeinrichtung Image recording device |
| 10/19/1989 | DE3811879A1 Direction-finding arrangement |
| 10/17/1989 | US4874937 Digital sun sensor |
| 10/11/1989 | EP0336418A2 Global positioning system receiver capable of computing heading information. |
| 10/11/1989 | EP0336152A1 Optical direction of arrival sensor |
| 10/10/1989 | CA1262275A1 Extendible sonobuoy apparatus |
| 09/27/1989 | EP0333706A1 Self-positioning carrier with wind safety device for solar panels. |
| 09/26/1989 | US4870420 Signal acquisition apparatus and method |
| 09/21/1989 | WO1989008853A1 Tcas bearing estimation receiver using a four element antenna |
| 09/20/1989 | EP0333459A2 Apparatus and method for position reporting |
| 09/19/1989 | US4868792 Difar demultiplexer test circuit |
| 09/19/1989 | US4868379 Photovoltaic array with two-axis power maximization tracking |
| 09/19/1989 | US4868378 Device for locating the source of coherent light through a turbulent medium |
| 09/19/1989 | US4867560 Optical alignment system |
| 09/19/1989 | US4867556 Apparatus for determining the path of a pulsed light beam |
| 09/13/1989 | EP0332169A1 Image shake detecting device |
| 09/13/1989 | CN1035562A Geodetic ground telemetering draughting instrument |
| 09/12/1989 | US4866627 Direction finder |
| 08/29/1989 | US4862180 Discrete source location by adaptive antenna techniques |
| 08/23/1989 | EP0329147A2 Improved optical direction of arrival sensor |
| 08/23/1989 | EP0328621A1 Dual mode video tracker |
| 08/15/1989 | US4858132 Optical navigation system for an automatic guided vehicle, and method |
| 08/15/1989 | US4857721 Optical direction sensor having gray code mask spaced from a plurality of interdigitated detectors |
| 08/08/1989 | US4855932 Three-dimensional electro-optical tracker |
| 08/08/1989 | US4855748 TCAS bearing estimation receiver using a 4 element antenna |
| 08/08/1989 | US4855588 Cylindrical wide field receiver element |
| 08/02/1989 | EP0326090A2 Circuit arrangement for weighting the output signals of a photodiode array |
| 07/27/1989 | WO1989006807A1 Remote sonic location system |
| 07/27/1989 | WO1989006806A1 Direction sensitive energy detecting apparatus |
| 07/26/1989 | EP0324769A1 Cylindrical deployable sonar |
| 07/26/1989 | CN1034267A Narrow frequency band supersonic leak detector |
| 07/25/1989 | CA1257917A1 Electro-optical position determining system |
| 07/18/1989 | US4850031 Avalanche victim locating apparatus |
| 07/18/1989 | US4849906 Dual mode video tracker |
| 07/18/1989 | US4849634 Modulation device |
| 07/18/1989 | US4849620 Optronic heading deviation measurement system providing spatial and spectral discrimination of infrared light sources |
| 07/12/1989 | EP0323508A1 Optical data link |
| 07/11/1989 | US4847862 Global positioning system course acquisition code receiver |
| 07/11/1989 | US4847688 Moving body recognition circuit using luminance signal and moving body tracking apparatus using the moving body recognition circuit |
| 07/05/1989 | EP0322502A2 Apparatus for determining target data |
| 07/05/1989 | EP0322483A1 Data element position indication |
| 07/04/1989 | US4845502 Signal |
| 07/04/1989 | CA1256967A1 System for locating a mobile |
| 06/29/1989 | DE3742423A1 Underwater navigation device |
| 06/27/1989 | CA1256531A1 Infrared sensor comprising improved feedback limited amplifier and associated method for amplifying electronic signals |
| 06/20/1989 | US4841304 Installation for the detection and location by interferometry, in real time and at great distance of lightening strikes |
| 06/14/1989 | EP0319653A2 Optoelectric interference-protected aircraft tracking |
| 06/08/1989 | DE3740142A1 Surveillance radar method with height finding |
| 06/01/1989 | WO1989004973A1 A method to measure the angle of incidence for radiation and a detector to carry out the method |
| 06/01/1989 | WO1989004972A1 A method to detect radiation and measure its angle of incidence and a detector arrangement to carry out the method |
| 05/30/1989 | US4834537 Position encoding holographic spectrometer |
| 05/24/1989 | EP0316489A1 Surveillance apparatus |
| 05/23/1989 | US4833478 Automatic direction finder antenna array |
| 05/16/1989 | US4831259 Pyrodetector suited for movement-selective and direction-selective detection |
| 05/16/1989 | CA1254292A1 Passive ranging of an airborne emitter by a single non-maneuvering or stationary sensor |
| 05/10/1989 | EP0314783A1 Airborne surveillance method and system |
| 05/10/1989 | EP0314715A1 Multi-mode microwave landing system |
| 05/09/1989 | US4829250 Magnetic direction finding device with improved accuracy |
| 05/03/1989 | EP0175737B1 Finding the direction of a sound |
| 05/03/1989 | DE3738222C1 Method and device for interference-proof (countermeasure-proof) location of missiles |
| 05/02/1989 | US4827422 Fan scan horizon sensor for a spin stabilized satellite |
| 05/02/1989 | US4827265 Cooperative tracking system |
| 04/25/1989 | US4825063 Radiation position detection using time-indicative variable-length fiber array |
| 04/25/1989 | US4824245 Response ratioing angle of arrival sensor that is responsive to scintillation |
| 04/19/1989 | EP0162858B1 Acoustic direction identification system |
| 04/18/1989 | US4823132 Device for the simulation of radar targets in laboratory tests of radar seekers |
| 04/18/1989 | US4821705 Solar tracking system |
| 04/12/1989 | EP0137828B1 Ferrite multiplexing and modulator assembly for beacon tracking system |
| 04/06/1989 | WO1989003076A1 Automatic vehicle guidance systems |
| 04/06/1989 | WO1989003075A1 Automatic vehicle guidance systems |
| 04/05/1989 | EP0310493A1 Opto-electronic device for the detection and localisation of a radiating source |
| 04/05/1989 | EP0309631A1 Method and apparatus for detecting position/variance of input light |
| 04/04/1989 | CA1252195A1 Electronic tracking system for microwave antennas |