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| Number | Title | Issue Date |
| 7786924 | DVOR apparatus and sideband antenna fault detecting method According to one embodiment, a DVOR apparatus includes a main device outputting a radio frequency (RF) signal, a distributor distributing the RF signal output from a main device into a plurality of systems, and sideband antennas radiating the RF signal, wherein, the... | 08/31/2010 |
| 7324040 | Method of automatically setting the gain of an interrogator receiver within a non-contacting identification system An attack is activated in a receiver amplifier of an interrogator whenever an amplified input signal exceeds an attack threshold voltage value Vatt, and the receiver amplifier at least during a waiting period, the length of which preferrably equals the double length... | 01/29/2008 |
| 7248219 | Correlation of flight track data with other data sources A method of triangulating aircraft transponder signals using a number of receivers connected to a central station over communication links includes applying at least one logic rule at each receiver to incoming transponder signals to filter redundant transponder sign... | 07/24/2007 |
| 7231274 | Method of programming a tire monitoring system A process for identifying TPMS electronic wheel sensors on a production line is disclosed. The line of identification data is transmitted in digital bit stream between the electronic wheel sensor and the production line database. Data from the electronic wheel senso... | 06/12/2007 |
| 7203688 | Analysing tactical data link messages A method of analyzing data link messages is disclosed. These messages include a message type field and at least one message content field whose meaning is determined by the message type. The method includes storing the plurality of data link messages in a database. ... | 04/10/2007 |
| 7132982 | Method and apparatus for accurate aircraft and vehicle tracking A direct multilateration target tracking system is provided with the TOA time stamp as an input. A technique of tracking targets with varying receiver combinations is provided. Methods of correlating and combining Mode A, Mode C, and Mode S messages to enhance targe... | 11/07/2006 |
| 7126534 | Minimum safe altitude warning A ground-based CFIT warning system provides pilots with CFIT alerts. The system is based upon a ground-based tracking system, which provides surveillance of aircraft, such as the AirScene™ multilateration system manufactured by Rannoch Corporation of Alexandria, V... | 10/24/2006 |
| 7123192 | Correlation of flight track data with other data sources The surveillance system provides a means to augment Automatic Dependent Surveillance-Broadcast (ADS-B) with “look alike ADS-B” or “pseudo ADS-B” surveillance transmissions for aircraft which may not be ADS-B equipped. The system uses ground based surveillanc... | 10/17/2006 |
| 7046186 | Friend/foe identification system for a battlefield The invention relates to an IFF apparatus for ground applications, which comprises: (a) an encoder for forming an interrogating or response sequence of pulses, and conveying the same to a UWB transmitter; (b) an UWB transmitter for getting said interrogating or resp... | 05/16/2006 |
| 6992626 | Method and apparatus to correlate aircraft flight tracks and events with relevant airport operations information AirScene™, through a unique fusion process, is the only NOMS system to provide such data, digitally, and in a form that is integrated with flight tracks, noise events, complaint, and operations data. Other systems provide only the flight track, noise event, and co... | 01/31/2006 |
| 6931687 | Flexible over the wing passenger loading bridge Apparatus for moving passengers between an airport terminal building and a doorway of an aircraft located rearward of a wing of the aircraft which includes a passageway member pivotally anchored to one of the terminal building and a passenger loading bridge for serv... | 08/23/2005 |
| 6745008 | Multi-frequency communication system and method A multi-frequency RFID remote communication system is provided that includes a plurality of RFID tags configured to receive a first signal and to return a second signal, the second signal having a first frequency component and a second frequency component, the secon... | 06/01/2004 |
| 6646588 | Midair collision avoidance system A midair collision avoidance system (MCAS) employs an existing design of Traffic Alert and Collision Avoidance System (TCAS) as a module and seamlessly integrates it with a customized tactical module which is capable of providing unique tactical avoidance... | 11/11/2003 |
| 6606559 | Radio navigation emulating GPS system The present invention provides a radio navigation emulating GPS device. In one embodiment, the radio navigation emulating GPS device receives an identifier associated with a conventional radio navaid. The present radio navigation emulating GPS device then... | 08/12/2003 |
| 6531978 | Midair collision avoidance system A midair collision avoidance system (MCAS) employs an existing design of Traffic Alert and Collision Avoidance System (TCAS) as a module and seamlessly integrates it with a customized tactical module which is capable of providing unique tactical avoidance... | 03/11/2003 |
| 6430479 | Methods, apparatus and computer program products for determining the vertical speed of an aircraft A method, an apparatus and a computer program product are provided for accurately determining the vertical speed of an aircraft in a manner independent of signals provided by an air data computer, an inertial reference system and an inertial navigation sy... | 08/06/2002 |
| 6405107 | Virtual instrument pilot: an improved method and system for navigation and control of fixed wing aircraft A self contained electronic system for manual or automatic control and navigation of fixed winged aircraft using electronic position sensing such as GPS, DGPS, WAAS, and the like, as the primary sensor and making use of known flight characteristics of the... | 06/11/2002 |
| 6324448 | Methods, apparatus and computer program products for determining the vertical speed of an aircraft A method, an apparatus and a computer program product are provided for accurately determining the vertical speed of an aircraft in a manner independent of signals provided by an air data computer, an inertial reference system and an inertial navigation sy... | 11/27/2001 |
| 6278396 | Midair collision and avoidance system (MCAS) A midair collision avoidance system (MCAS) employs an existing design of Traffic Alert and Collision Avoidance System (TCAS) as a module and seamlessly integrates it with a customized tactical module which is capable of providing unique tactical avoidance... | 08/21/2001 |
| 6262679 | Midair collision avoidance system A midair collision avoidance system (MCAS) employs an existing design of Traffic Alert and Collision Avoidance System (TCAS) as a module and seamlessly integrates it with a customized tactical module which is capable of providing unique tactical avoidance... | 07/17/2001 |
| 6163753 | Radio navigation emulating GPS system The present invention provides a radio navigation emulating GPS device. In one embodiment, the radio navigation emulating GPS device receives an identifier associated with a conventional radio navaid. The present radio navigation emulating GPS device then... | 12/19/2000 |
| 6133867 | Integrated air traffic management and collision avoidance system A collision avoidance system utilizes a satellite navigational system to continuously determine object motion parameters relative to the earth's surface and exchanges this information with other objects. The system calculates collision potential with othe... | 10/17/2000 |
| 5801659 | Apparatus and method for coupling satellite navigation signals to a VOR system A navigation and control apparatus having a link to a GPS device for receiving positional and navigational data therefrom, a converter to convert the GPS signals into a VOR format, and a VOR signal generator to transmit the converted signals to a VOR rece... | 09/01/1998 |
| 5627546 | Combined ground and satellite system for global aircraft surveillance guidance and navigation The present invention provides a combined ground and satellite system for global aircraft surveillance, navigation, landing guidance and collision avoidance which comprises a satellite subsystem consisting of both a satellite constellation and associated ... | 05/06/1997 |
| 5424746 | Method and system for monitoring vehicles System for tracking a vehicle equipped with a transponder which emits a first reply signal containing data identifying the vehicle in response to a first interrogation signal and emits a second reply signal containing data specifying the altitude of the v... | 06/13/1995 |
| 5185609 | Signal monitor utilizing digital signal processing A VOR monitor employs a microprocessor-based system in which, after initial analog detection of a transmitted VOR signal, the critical parameters of the signal are extracted by digital signal processing to ensure that the transmitted signal in space remai... | 02/09/1993 |
| 5157408 | Low probability of interception relative position determination system A radio system for determining the range and bearing of mobile equipment, such as an aircraft, relative to reference equipment such as an aircraft carrier, with low probability of interception (LPI). The aircraft remains equipped with high power range and... | 10/20/1992 |
| 5144315 | System for accurately monitoring aircraft position during training exercises Tracking system for monitoring aircraft position during simulated training exercises. Standard IFF transponders on the aircraft are periodically enabled by a squitter transmitter mounted on the aircraft. On the ground a plurality of receiving stations are... | 09/01/1992 |
| 5128873 | Aircraft rendezvous using low data rate two-way TACAN bearing information Aircraft rendezvous is facilitated by operating airborne remote aircraft TACAN stations in the inverse bearing mode and using low data rate range interrogation and range reply signals for determining bearing. An aircraft determines its bearing to another ... | 07/07/1992 |
| 4843399 | Portable navigational communications transceiver A hand held navigational-communications transceiver is compressed into a case having a volume of about 37 cubic inches by defining functional implementation for VOR (VHF omni-directional range) navigation. The transceiver can be selectively switched to pr... | 06/27/1989 |
| 4454510 | Discrete address beacon, navigation and landing system (DABNLS) An aircraft surveillance, navigation, landing, guidance and collision avoidance system is provided which takes the form of a two-way data communication link between each of a plurality of controlled aircraft and a ground station, and appropriate measuring... | 06/12/1984 |
| 4162495 | Updating an en-route Tacan navigation system to a precision landing aid High accuracy distance measurements are achieved with a low accuracy Tacan set by utilizing signals available within the Tacan set at a point of sufficient accuracy to provide accurate distance measurements to be made and thus upgrade an en-route navigati... | 07/24/1979 |
| 4143376 | Method for sampling Tacan signal envelope This invention relates to a method for supplying samples of the received signal envelope in airborne Tacan equipment to the airborne bearing circuitry. During the DME search phase, the airborne DME equipment searches for only those replies which have been... | 03/06/1979 |
| 4069412 | Area navigation system There is disclosed an area navigation system including signal averaging and lag compensation circuits to overcome VOR signal propagation instabilities and a meter sensitivity control circuit which decreases the sensitivity of a track angle deviation left-... | 01/17/1978 |
| 3969616 | Digital range computer systems for air navigation systems such as tacan A digital range computer which may be incorporated in a Tacan air navigation set is described. The computer includes a calculation unit which calculates the range from information as to the elapsed time between interrogation and reply signals. The signals... | 07/13/1976 |
| 3940763 | Digital tacan system A digital tacan system which provides improved bearing and range accuracy and allows faster acquisition. In computing, both bearing and range updates are maintained current using a Kalman filter. Portions of the computation may be performed in an on-board... | 02/24/1976 |
