| 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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| 10/29/1991 | US5062051 Method for observing by scanning a celestial body and for measuring an angular velocity of a space vehicle, observation system for its implementation, and space vehicle comprising same |
| 10/29/1991 | US5061064 Detector of the arrival angle of laser pulses, especially for tanks |
| 10/23/1991 | EP0452970A2 Antenna beam pointing method for satellite mobile communications system |
| 10/17/1991 | WO1991015739A1 A detection system for use in an aircraft |
| 10/16/1991 | EP0451517A1 Acoustic image acquisition |
| 10/16/1991 | EP0451219A1 Process for determining the direction and range of noise-generating targets. |
| 10/15/1991 | US5057833 Passive optical air traffic alert system |
| 10/15/1991 | US5057820 Optical warning system |
| 10/10/1991 | DE4011453A1 Coating for passive IR detector components - comprises hydrophilic material on one or more components in beam path to prevent water droplet formation |
| 10/09/1991 | EP0449936A1 Sensor for an air-conditioning system in a vehicle. |
| 10/08/1991 | US5056051 Signal direction finding processor using fast Fourier transforms for receiver matching |
| 10/08/1991 | US5055926 Video image position determination |
| 10/08/1991 | US5055689 Horizon sensor apparatus and method therefor |
| 10/02/1991 | EP0449155A2 Satellite antenna tracking system |
| 10/02/1991 | EP0448994A1 Method of finding the directions of one or several microwave sources |
| 10/02/1991 | DE4010067A1 Sonar-type positioning device for submarine - has opto-scanner using rotatable and fixed discs, with delays on rotating part |
| 10/01/1991 | US5053784 Apparatus and method for measuring the azimuth and elevation of an object |
| 10/01/1991 | US5053781 High resolution passive microwave sensors for earth remote sensing |
| 10/01/1991 | US5053622 Early ballistic missile detection system |
| 10/01/1991 | US5052800 Boresighting method and apparatus |
| 10/01/1991 | CA1290057C Method and apparatus for displaying moving objects |
| 09/17/1991 | US5049890 Sampled data processing |
| 09/17/1991 | US5049756 Method and system for detecting forest fires |
| 09/17/1991 | US5049741 Electromagnetic wave shielding system for optical sensor having an aperture |
| 09/17/1991 | US5048774 High-accuracy attitude sensor for spin stabilized satellite |
| 09/12/1991 | DE4035311C1 Searching for hot air currents for glider - amplifying filtered output of electroacoustic transducer detecting infra sound to show highest received frequency |
| 09/10/1991 | US5047995 Detection of moving objects |
| 09/10/1991 | US5047776 Multibeam optical and electromagnetic hemispherical/spherical sensor |
| 09/04/1991 | EP0258433B1 Extremely high speed, real-time background filter for radiation detectors |
| 09/03/1991 | US5045858 Sidelobe identification and discrimination system with signal multiplexer-separator |
| 09/03/1991 | US5045857 High-speed beam switching processor |
| 09/03/1991 | US5045684 Light detection with waveguide having fully and partially reflecting sides |
| 08/29/1991 | DE4004611A1 Angle discriminator locating direction of HF EM waves - uses superheterodyne system with sum and difference components |
| 08/27/1991 | US5043737 Precision satellite tracking system |
| 08/27/1991 | US5043726 Spectral analyzer and direction indicator for laser guided aircraft landing system |
| 08/27/1991 | US5042428 Implement for milking an animal |
| 08/21/1991 | EP0442390A1 Batteryless transponder |
| 08/20/1991 | US5041735 Miniature infrared test target |
| 08/20/1991 | US5040892 Method and apparatus for determining the direction to a laser beam source |
| 08/20/1991 | US5040891 Laser-warning method and apparatus |
| 08/14/1991 | EP0441534A2 Miniature infrared test target |
| 08/13/1991 | US5040156 Acoustic sensor device with noise suppression |
| 08/13/1991 | US5039991 Perturbation modeling system for use in processing direction-finding antenna outputs |
| 08/09/1991 | WO1991012539A1 Lightning direction finder controller (ldfc) |
| 08/01/1991 | DE4102196A1 Image processing for endoscope field - has CCD camera output interpolated to determine X and Y position signals |
| 07/31/1991 | EP0439334A2 Motion analysis system |
| 07/30/1991 | US5036498 Method for determining the motion of a target in underwater acoustics |
| 07/30/1991 | US5036464 Methods of detecting endoscope insertion direction |
| 07/30/1991 | US5036334 Lightning direction finder controller (LDFC) |
| 07/30/1991 | US5036333 Antenna-rotation compensation apparatus and method for phased array antennas |
| 07/30/1991 | US5035381 Method of and apparatus for returning an earth orbiting spacecraft to an earth pointing attitude after displacement therefrom |
| 07/26/1991 | WO1991011730A1 Precision landing system |
| 07/25/1991 | WO1991011037A1 Real time signal separation method and device |
| 07/25/1991 | WO1991010918A1 Collision avoidance transmit system with autocalibration |
| 07/16/1991 | US5033034 Onboard acoustic tracking system |
| 07/16/1991 | US5032844 Sky wave direction finder |
| 07/09/1991 | US5031226 Arrangement for determining contrasting objects in a picture |
| 07/09/1991 | US5031049 Automatic object image follow-up device |
| 07/09/1991 | US5030959 Enhanced automatic bearing indicator system |
| 07/09/1991 | US5030004 Process and apparatus for controlling the alignment of a transmit laser beam of a coherent detection optical communications transmitter/receiver terminal |
| 07/03/1991 | EP0435768A1 Method and device of attitude measurement of a moving body by tracking a pattern placed on the body |
| 07/03/1991 | CN1013062B Method and device in antenna and receiving system of radio theodolite |
| 06/29/1991 | CA2033228A1 Position and heading detecting device for self controlled vehicle |
| 06/29/1991 | CA2032412A1 Mobile movement restitution method through observation of a marking on said mobile, and device for executing said process |
| 06/26/1991 | EP0275266B1 Rosette scanning surveillance sensor |
| 06/25/1991 | US5027413 Target detection systems |
| 06/25/1991 | US5026162 Optical interference position measurement system |
| 06/20/1991 | DE3941391A1 Passive detection of weapon firing - sensing first by IR and UV cameras coupled to processing circuit |
| 06/19/1991 | EP0432294A1 Method to determine the azimuth and elevation angles of incoming direction of high frequency pulses by means of monopulse amplitude evaluation |
| 06/18/1991 | US5025148 Laser warning sensor with frequency-coded position information |
| 06/18/1991 | CA1285052C Installation for the detection and location by interferometry, in real time and at great distance of lightning strikes |
| 06/18/1991 | CA1285048C Integrated-optics implementation of an interferometric spectrum analyser |
| 06/13/1991 | CA2005446A1 Radar reflector to enchance radar detection |
| 06/12/1991 | EP0432014A1 Optoelectronic assistance system for air-raid missions and navigation |
| 06/11/1991 | US5023441 Method to measure the angle of incidence for radiation and a detector to carry out the method |
| 06/11/1991 | US5023440 Tracker using angle-converting cones |
| 06/02/1991 | CA2031178A1 Optoelectronic system for enhancing air attack and navigational missions |
| 05/29/1991 | EP0429349A1 Method and device for transmission of broadband signals with a mobile equipment |
| 05/29/1991 | EP0429089A2 Horizon sensor for satellites |
| 05/29/1991 | EP0275302B1 Correlated sampling amplifier |
| 05/28/1991 | US5018509 Endoscope insertion controlling apparatus |
| 05/22/1991 | EP0428345A2 A receiving head for a radiation detector having a defined field of view |
| 05/21/1991 | US5017930 Precision landing system |
| 05/16/1991 | WO1991006874A1 Process for determining the direction and range of noise-generating targets |
| 05/16/1991 | WO1991006873A1 Anti-collision detection and warning system |
| 05/15/1991 | EP0427537A2 Image tracking |
| 05/14/1991 | US5016019 Method and apparatus for processing synthetic aperture aerial signals |
| 05/14/1991 | US5015844 Optical surveillance sensor apparatus |
| 05/07/1991 | US5014250 Acoustic detection device |
| 05/02/1991 | EP0425355A1 Position finding system for a moving object |
| 05/02/1991 | EP0292546B1 Circuit for determining the extreme value of a voltage |
| 04/30/1991 | US5012270 Image shake detecting device |
| 04/30/1991 | US5012082 Two-dimensional incident position detector device for light or radiation |
| 04/30/1991 | US5012081 Strapdown stellar sensor and holographic lens therefor |
| 04/24/1991 | EP0423984A2 Synergistic tracker |
| 04/24/1991 | EP0423254A1 Emergency rescue system |
| 04/23/1991 | US5010343 Method and device in the antenna and receiving system of a radio theodolite |
| 04/23/1991 | US5010244 Method to detect radiation and measure its angle of incidence and a detector arrangement to carry out the method |
| 04/16/1991 | US5008844 Collision avoidance transmit system with autocalibration |
| 04/16/1991 | US5008522 Device for the selective detection of objects |