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| Number | Title | Issue Date |
| 7313477 | Vehicle dash-mounted navigation device A GPS system (10) which may be mounted on a dashboard (12) of any vehicle (14) after the vehicle has been manufactured yet appears to be integral with the dashboard. The GPS system (10) includes a GPS device (16), a hood (18... | 12/25/2007 |
| 7289466 | Localization for low cost sensor network Wireless devices, systems and approaches or methods having the capability of determining the location of a given wireless device. An example system includes a wireless device that generates at least one pulse as a part of an output signal, and the at least one pulse... | 10/30/2007 |
| 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 |
| 7142152 | Device and method for calibrating and improving the accuracy of barometric altimeters with GPS-derived altitudes A portable, handheld electronic navigation device includes an altimeter and a GPS unit. An internal memory stores cartographic data, for displaying the cartographic data on a display of the navigation device. Accordingly, the device is capable of displaying cartogra... | 11/28/2006 |
| 7142980 | Vehicle dash-mounted navigation device A GPS system (10) which may be mounted on a dashboard (12) of any vehicle (14) after the vehicle has been manufactured yet appears to be integral with the dashboard. The GPS system (10) includes a GPS device (16), a hood (18... | 11/28/2006 |
| 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 |
| 7069147 | Airborne based monitoring A weather monitoring and prediction system that uses a fleet of aircraft to obtain data. Each aircraft has a local air data system that facilitates the measurement, recordation, and transmittal of local atmospheric data such as barometric pressure, and the correspon... | 06/27/2006 |
| 7019693 | Estimating altitude of a communications device The altitude of a communications device, which communicates with a communications system via at least one antenna, is estimated. The altitude estimation is based at least on altitude information of said at least one antenna. The altitude estimate of the communicatio... | 03/28/2006 |
| 6992624 | Attitude determination system using null-steered array Apparatus and process for determining the position and heading or attitude of an antenna array are described based on radiating sources, preferably GNSS or other such satellite positioning systems. An optimum satellite is selected and the antenna array is “null st... | 01/31/2006 |
| 6965344 | Firefighter locator A wireless system and method for locating the position of a movable signal emitter located inside or adjacent to a structure includes establishing at least three base station sites at known locations around the structure. The signal emitter then transmits an omni-di... | 11/15/2005 |
| 6950056 | Methods and apparatus for determination of a filter center frequency A method for calculating a center frequency and a bandwidth for a radar doppler filter is herein described. The center frequency and bandwidth are calculated to provide radar performance over varying terrain and aircraft altitude, pitch, and roll. The method include... | 09/27/2005 |
| 6947734 | Method and system for location accuracy analysis A wireless telecommunications network uses a wireless location technology to determine the locations of mobile stations. As part of a location accuracy analysis process, the wireless location technology is used to obtain a measured latitude and longitude for a mobil... | 09/20/2005 |
| 6943704 | Method for collecting altitude-related data along roads A method is disclosed for obtaining altitude-related data along roads. A vehicle includes equipment capable of determining the current absolute positions of the vehicle as it is being driven. The vehicle also includes equipment capable of determining a distance trav... | 09/13/2005 |
| 6930638 | Passive moving object detection system and method using signals transmitted by a mobile telephone station A passive object detection system (1) comprises first and second antennas (4, 6) and a processor (8). The first antenna (4) is adapted to receive a signal transmitted by a mobile telephone base station; the second antenna (6) is ad... | 08/16/2005 |
| 6927725 | System and method for radar detection and calibration A system and method for radar detection and calibration. By measuring the true range of a calibration target on entry to the radar's detection zone, the actual detection capability of the radar in current atmospheric conditions with the actual radar can be determine... | 08/09/2005 |
| 6919565 | Infrared imaging apparatus and infrared monitoring apparatus for vehicle To obtain an image signal in which the distance to a target can be recognized, an infrared imaging apparatus 47 comprises an infrared irradiation unit 48 for radiating infrared radiation in an attenuation wavelength range in which the infrared radiatio... | 07/19/2005 |
| 6792352 | Vehicle data bus system with positioning means A vehicle data bus system includes locating means which comprise a locating computing unit and a locating sensor system which contains at least one GPS receiver with associated GPS antenna and gyro data acquisition means, and a data bus via which connects a pluralit... | 09/14/2004 |
| 6768449 | Device and method for calibrating and improving the accuracy of barometric altimeters with GPS-derived altitudes A portable, handheld electronic navigation device includes an altimeter and a GPS unit. An internal memory stores cartographic data, for displaying the cartographic data on a display of the navigation device. Accordingly, the device is capable of displaying cartogra... | 07/27/2004 |
| 6584384 | Device, method and computer program product for altimetry system An apparatus, system, method and computer program product to verify proper operation of an aircraft altimetry system. Aural and visual alerts may optionally be provided when a fault in the altimetry is detected.... | 06/24/2003 |
| 6549165 | Ocean altimetry interferometric method and device using GNSS signals A method for performing Earth altimetry comprising the steps of: receiving by an upward-looking antenna onboard a platform above the Earth surface, direct signals having at least two different carrier frequencies transmitted by GNSS satellites in view of ... | 04/15/2003 |
| 6522298 | Device and method for calibrating and improving the accuracy of barometric altimeters with GPS-derived altitudes A portable, handheld electronic navigation device includes an altimeter and a GPS unit. An internal memory stores cartographic data, for displaying the cartographic data on a display of the navigation device. Accordingly, the device is capable of displayi... | 02/18/2003 |
| 6518918 | Wireless assisted altitude measurement Disclosed is a communication device and method for estimating a more accurate vertical position or altitude of a communication device using atmospheric pressure measurements. In one embodiment, a first communication device comprises a pressure sensor for ... | 02/11/2003 |
| 6421010 | Atmospheric sondes and method for tracking A system for wind profiling comprises sondes for being borne through the atmosphere by balloons and transmitting signals enabling identifying the sondes, and received by receivers capable of determining the angle of arrival (AOA) of the signals from the s... | 07/16/2002 |
| 6307504 | Method and system for using altitude information in a satellite positioning system A method and apparatus for determining a position of a mobile satellite positioning system (SPS) receiver. In one example of a method, a cell object information is determined; this cell object information comprises at least one of a cell object location o... | 10/23/2001 |
| 6298287 | System and method of compensating for pressure sensor errors and noise in inertial vertical loop data A system and method for improving the accuracy of altitude determinations in an inertial navigation system. The system utilizes pressure measurements which are taken by a barometric altimeter and converted into an estimated pressure altitude using any kno... | 10/02/2001 |
| 6252525 | Anti-collision system An anti-collision system is provided to enhance the conspicuousness of an aircraft to a second aircraft presenting a collision threat. When the computer of an airborne Traffic Collision Avoidance System (TCAS) designates a second proximately located aircr... | 06/26/2001 |
| 6242907 | Apparatus and method of determining the orientation of an object relative to a magnetic field A method and apparatus for determining the orientation of an object relative to a reference magnetic field includes establishing generally adjacent to the object a modifiable magnetic field. The direction of the modifiable magnetic field is changed among ... | 06/05/2001 |
| 6222487 | System and method for measurement A method and a system for determining an altitude of an object of interest, for example, an airplane that transmits electromagnetic radiation in the form of radar signals. A number of sub-units that can detect the radar signals are spread out in an area, ... | 04/24/2001 |
| 6216064 | Method and apparatus for determining altitude Methods and apparatus for determining altitude, specifically altitude in an aircraft, and an estimated error of the altitude. The altitude determination preferably uses a first altitude based on hydrostatic calculations, including local pressure and tempe... | 04/10/2001 |
| 6073077 | Method for determining gravity in an inertial navigation system The invention is a method for determining gravity in an inertial navigation system which periodically produces and stores in memory position coordinates. The method comprises the steps of (a) retrieving the most recently determined position coordinates, (... | 06/06/2000 |
| 6061018 | Method and system for using altitude information in a satellite positioning system A method and apparatus for determining a position of a mobile satellite positioning system (SPS) receiver. In one example of a method, a cell object information is determined; this cell object information comprises at least one of a cell object location o... | 05/09/2000 |
| 5940035 | Method for calibrating aircraft altitude sensors A method for calibrating a pressure-sensing altitude sensor of an aircraft while the aircraft is in flight. The method includes the steps of obtaining a set of reference atmospheric pressures as a function of height above a base station by affixing a refe... | 08/17/1999 |
| 5889491 | Calibration for pilot warning system A calibration system for a pilot warning system includes first and second calibration antennas spaced apart on an aircraft. The first and second calibration antennas receive the same pulsed RF signal, suitable delayed so that, after emission from the cali... | 03/30/1999 |
| 5850197 | Attitude determination using fewer than three antennas Method and apparatus for determining the attitude or angular orientation of a moving vehicle or other moving body, using either two spaced apart antennas or a single antenna attached to or connected with the vehicle. Where two antennas are used, the spati... | 12/15/1998 |
| 5652592 | Radio location with enhanced Z-axis determination An enhanced system for calculating the Z-Axis, or relative height or altitude, of a radio beacon. The present invention uses a barometric pressure sensing device co-located with the radio emitter to transmit data representing relative altitude. To further... | 07/29/1997 |
| 5506590 | Pilot warning system This invention relates to a system to alert an aircraft pilot of the presence and general location of other aircraft that might constitute a collision threat to the pilot's aircraft. A first and second antenna on the upper paid lower surfaces of the aircr... | 04/09/1996 |
| 5434574 | System for detecting an altitude of a vehicle dependent on a global positioning system It is determined that an altitude of a vehicle can not be calculated from data applied from satellites. When the calculation can not be performed, a provisional altitude is obtained with a following equation: H=(1-)HG +HO wh... | 07/18/1995 |
| 5126748 | Dual satellite navigation system and method A system and method for determining the position of an airborne object, using a fixed station and a pair of earth orbit satellites whose positions are known. Separate periodic signals are transmitted from the fixed station via the first and second satelli... | 06/30/1992 |
| 4965586 | Position determination and message transfer system employing satellites and stored terrain map A radio position determation and message transfer system is implemented using a pair of satellites in geostationary orbit for replaying interrogation and replay signals between a ground station and a user-carried transceiver. The user portion is calculate... | 10/23/1990 |
