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| Number | Title | Issue Date |
| 4914734 | Intensity area correlation addition to terrain radiometric area correlation A system which combines intensity area correlation is disclosed for use with terrain height radar and infrared emissivity systems to give a simultaneous three-mode map matching navigation system. The infrared system senses passive terrain emissions while ... | 04/03/1990 |
| 4905292 | High probability of detection, low false alarm multisensor ATR An Aided Target Recognition System (ATR) is provided wherein the recognit abilities of two ATR sensor subsystems with mutually exclusive false alarm characteristics are fused by a decision circuit to provide an improved false alarm rate versus the probab... | 02/27/1990 |
| 4866454 | Multi-spectral imaging system A multi-spectral imaging apparatus with a common collecting aperture, which combines a high performance infrared imaging system with a high performance millimeter wave transceiving system. Two mirror surfaces are combined with a refractive corrector in th... | 09/12/1989 |
| 4843459 | Method and device for the display of targets and/or target positions using data acquisition means of a weapons system The invention pertains mainly to a method and a device for the display of targets and/or target positions using the data acquisition means of a weapons system. The device of the present invention can be used to display the target or the direction of the t... | 06/27/1989 |
| 4820041 | Position sensing system for surveying and grading A position sensing apparatus and method useful for surveying, marking, and grading implement sensing and control is disclosed. The position sensing apparatus includes two laser reference stations, each of which projects a laser beam that periodically swee... | 04/11/1989 |
| 4780719 | Method of, and apparatus for, area and air space surveillance The proposed surveillance system for surveilling a given scenario in azimuth and in elevation comprises an infrared surveillance detection device passively operating in the infrared region and a radar search and/or tracking device operating in the active ... | 10/25/1988 |
| 4774515 | Attitude indicator This invention relates to providing aural indications to a person indicative of that person's environment and, more particularly, to providing such indications in three-dimensional form. More specifically, this invention relates to providing such three-di... | 09/27/1988 |
| 4761652 | Arrangement for measuring the distance separating the arrangement from a moving body A distance-measuring arrangement including transmission means for transmitting a wave in a measuring field, receiving means for receiving the wave reflected from a moving body moving in the measuring field and for producing a beat signal from the Doppler ... | 08/02/1988 |
| 4698638 | Dual mode target seeking system A dual mode target seeking system for airborne vehicles which operates under two different frequencies simultaneously includes a radio frequency antenna comprising a slotted plate defining a ground plane with an image plate positioned in front of the grou... | 10/06/1987 |
| 4652885 | Dual mode antenna for millimeter wave and infrared radiation A dual mode antenna that allows both millimeter wave and infrared radiation o enter a single aperture and propagate through a common transmission device to a point where the respective energies are divided to follow separate paths for subsequent processing... | 03/24/1987 |
| 4477814 | Dual mode radio frequency-infrared frequency system A combined RF/IR system in which a common surface is used in the dual modes of radiating and absorbing RF energy and of reflecting and focusing IR energy. The common surface is structured, configured, and used as the slotted array antenna for the RF energ... | 10/16/1984 |
| 4342032 | Device for the detection of and defense against masked helicopters A device for the detection of and defense against low-flying helicopters which are masked or hidden by ground cover has a heat-sensitive sensor and an optical filter to detect heat radiation which is modulated at a frequency corresponding to the frequency... | 07/27/1982 |
| 4333077 | Device for distance acquisition in a radar system A device for distance acquisition in a radar system, especially a tracking system, comprises a surveillance radar with a mobile directional antenna whose direction is known at each instant, a tracking unit whose line of sight is also known at each instant... | 06/01/1982 |
| 4317117 | Cross correlated doppler radar/infra red velocity and presence sensor A doppler radar and infra red sensor focused by common means onto a region, will, with appropriate cross correlation, provide improved velocity and presence sensing in a complex uncontrolled environment. The illustrative overhead, roadside traffic sensor ... | 02/23/1982 |
| 4282527 | Multi-spectral detection system with common collecting means A multi-spectral detection system for detecting radiation within frequency bands that are in diverse portions of the electromagnetic spectrum is disclosed. The preferred embodiment is a Cassegrain system including a primary reflector for reflecting radian... | 08/04/1981 |
| 4264907 | Rolling dual mode missile In a rolling missile a seeker system which is responsive to two forms of energy emanating from a target. The system has the capability to switch between guidance modes during its path towards its intended target.... | 04/28/1981 |
| 4193072 | Combination infrared radio fuze 2. A combination proximity fuze comprising a radio circuit and an infrared ircuit, said radio circuit operative to produce a first voltage impulse when a reflected electromagnetic wave is received from a target, said infrared circuit operative to produce a... | 03/11/1980 |
| 4050068 | Augmented tracking system An augmented tracking apparatus utilizing an optical tracker in conjunction with a radar sensor to lock on to and track a moving target aircraft.... | 09/20/1977 |
| 4019180 | Remote infrared signal communicator An infrared viewer is provided which has a radio link to a remote monitoring station. Both on site and remote monitoring capabilities are provided at all times with minimum power requirements at the site, although the viewer may be intentionally located a... | 04/19/1977 |
| 3992707 | Reproduction of a field of view as scanned by a remote controlled aircraft The field-of-view is line-scanned transverse to movement of a vehicle such as an aircraft and the line scan signal is transmitted to a ground station in which a frame is assembled on a line for line basis with updating by each new scanning line to obtain ... | 11/16/1976 |
| 3934250 | Helicopter blind landing and hover system A precision hover and landing system for use in a helicopter is provided. A elevision camera system, an infra-red scanner and a passive radar antenna array are located on a three-axis gimbal mounted on the helicopter. An airborne radar angle tracking recei... | 01/20/1976 |
