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| Number | Title | Issue Date |
| 7671794 | Attitude estimation using intentional translation of a global navigation satellite system (GNSS) antenna A system determines three-dimensional attitude of a stationary or moving platform using signals from a Global Navigation Satellite System (GNSS) antenna that undergoes deliberate translation, which may be occasional. The system uses single GNSS receiver, a single GN... | 03/02/2010 |
| 7626541 | Orientation transfer device and method A self-contained device and method provides that a first body or unit is held in, mounted on or otherwise place in a predetermined position relative to an orientation transfer device that determines its orientation and/or position. The orientation transfer device is... | 12/01/2009 |
| 7504995 | Method and system for circular polarization correction for independently moving GNSS antennas A system and method for compensating for changes in relative antenna attitude in a single-receiver position detection system, such as a differential carrier phase GPS system, utilizes sensor input to detect changes in the relative attitude of at least two antennas o... | 03/17/2009 |
| 7468695 | GPS attitude determination system and method using baseline extension The baseline of a GPS attitude determination system is extended beyond the confines of the platform to improve attitude determination. A structurally detached GPS antenna is located away from the platform defining an extended baseline to a body-fixed GPS antenna att... | 12/23/2008 |
| 7400956 | Satellite position and heading sensor for vehicle steering control A sensor system for vehicle steering control comprising: a plurality of global navigation satellite sensor systems (GNSS) including receivers and antennas at a fixed spacing to determine a vehicle position, velocity and at least one of a heading angle, a pitch angle... | 07/15/2008 |
| 7397422 | Method and system for attitude determination of a platform using global navigation satellite system and a steered antenna A system and method for determining the attitude of a platform is provided. The method includes: (a) Searching and scanning for one or more GPS satellite(s) to determine initial platform position; wherein a single directionally steered antenna scans for the GPS/GNSS... | 07/08/2008 |
| 7388538 | System and method for obtaining attitude from known sources of energy and angle measurements A system and method of determining an orientation of a spinning object at a known GPS location comprises radially deploying antennae around a plurality of axes of measurement of the spinning object; determining a spin axis of a first end of the spinning object; meas... | 06/17/2008 |
| 7388539 | Carrier track loop for GNSS derived attitude A method and system for reducing Global Navigation Satellite System (GNSS) carrier tracking loop ambiguities comprising: receiving a plurality of GNSS satellite signals with a first antenna in operable communication with a first tracking device and a second antenna ... | 06/17/2008 |
| 7362531 | Controlling hard disk drive based on portable terminal movements A portable wireless communication terminal includes a sensor to detect a movement of the portable wireless communication terminal and output a first signal based on an acceleration of the movement and a second signal based on a velocity of the movement and a control... | 04/22/2008 |
| 7355549 | Apparatus and method for carrier phase-based relative positioning A carrier phase-based relative positioning apparatus includes a plurality of antennas fixedly mounted on a moving body for receiving positioning signals from satellites, an inertial measurement unit (IMU) for measuring accelerations and angular velocities of the mov... | 04/08/2008 |
| 7346452 | Inertial GPS navigation system using injected alignment data for the inertial system An inertial (“INS”)/GPS receiver uses injected alignment data to determine the alignment of the INS sub-system when the receiver is in motion during start-up. The alignment data is determined from parameterized surface information, measured GPS velocity, and a k... | 03/18/2008 |
| 7333815 | Power-saving remote locator system and method A server for authenticating subscribers in a tracking and locating system and method is disclosed. The locating system provides positional information of locator devices in the form of pages viewable by subscribers over a network. ... | 02/19/2008 |
| 7328074 | Real-time quadratic programming for control of dynamical systems Real-time control of a dynamical system is provided by determining control variables that get as close as possible to producing a desired response. Additional consideration of physical limitations leads to a convex Quadratic Program with inequality constraints that ... | 02/05/2008 |
| 7315781 | System and method for determining orientation based on solar positioning Determination of the orientation of a unit is based on solar positioning. An actual measurement of the position of the sun is taken and compared to a theoretical determination of the position of the sun. By comparing the actual and theoretical positions, the orienta... | 01/01/2008 |
| 7310062 | Dual antenna diversity method to detect GPS signal tampering A method of detecting GPS signal tampering uses two GPS receivers. A first receiver measures carrier phases of two or more satellite signals and of a tampered signal. A second receiver measures carrier phases of the two or more satellite signals and the tampered sig... | 12/18/2007 |
| 7292185 | Attitude determination exploiting geometry constraints A method and system for determining at least one attitude angle of a rigid body. The method comprising: receiving a plurality of Global Navigation Satellite System (GNSS) satellite signals with a plurality of antennas; establishing at least one pair of antennas such... | 11/06/2007 |
| 7292183 | GPS reference system providing synthetic reference phases for controlling accuracy of high integrity positions A positioning system or synthetic phase processor or rover station for providing high integrity positions with graduated accuracies. The positioning system includes one or more real time kinematic (RTK) reference stations for receiving GPS signals at established ref... | 11/06/2007 |
| 7292186 | Method and system for synchronizing multiple tracking devices for a geo-location system A method and system of synchronizing multiple tracking devices in a geo-location receiver system comprising: receiving a first plurality of geo-location signals with a first tracking device; and receiving a second plurality of geo-location signals with a second trac... | 11/06/2007 |
| 7266589 | Service-portal enabled automation control module (ACM) The invention presents a system and a method for assisting automation control module (ACM) customers to retrieve information relevant to their specific ACM(s). A service-portal ACM combines a conventional ACM with a service portal and/or a general-purpose computer t... | 09/04/2007 |
| 7250904 | Navigation satellite acquisition in satellite positioning system receiver A method in a mobile satellite positioning system receiver operating in cold-start mode, including searching for and detecting (310) a first satellite in a constellation of orbiting satellites, searching (320) for a second satellite based on detection ... | 07/31/2007 |
| 7248948 | Apparatus and method for estimating attitude using inertial measurement equipment An apparatus for estimating attitude using an inertia measuring apparatus comprising: a Kalman filter 3 adapted to receive a quantity of state ω(t) from the inertia measuring apparatus 1, input the quantity of state into a predetermined system equatio... | 07/24/2007 |
| 7245256 | GPS position-finding system and method of finding position of GPS terminal A position-finding system is comprised of a terminal having a global positioning system (GPS) for finding a position thereof, and a server which calculates altitude data, based on terrain data in an area in which the terminal is. The terminal includes a controller w... | 07/17/2007 |
| 7239944 | Programmable lawn mower A robotic apparatus for traversing a selected area autonomously that senses orientation relative to the Earth's magnetic field or other “environmental” signals. The robotic apparatus is provided in two models, a master that can record directive and compass or ... | 07/03/2007 |
| 7233864 | Method for improving GPS integrity and detecting multipath interference using inertial navigation sensors and a network of mobile receivers A method for checking the integrity of GPS measurements for a moving vehicle includes determining a first inter-vehicle distance between a first vehicle and a second vehicle based on GPS measurements obtained at both vehicles, independently determining a second inte... | 06/19/2007 |
| 7230567 | Azimuth/attitude detecting sensor The sensor successively calculates a rolling angle, pitch angle and azimuth from the coordinate transformation matrix with the level error and azimuth error compensated. It calculates azimuth error compensatory values using the GPS direction signal and calculates a ... | 06/12/2007 |
| 7227496 | GPS rover station having position dithering for controlling accuracy of secure positions A positioning system or synthetic phase processor or rover station for providing high integrity positions with graduated accuracies. The positioning system includes one or more real time kinematic (RTK) reference stations for receiving GPS signals at established ref... | 06/05/2007 |
| 7202813 | GPS reference system providing a synthetic offset vector for dithering a rover station position A positioning system or synthetic phase processor or rover station for providing high integrity positions with graduated accuracies. The positioning system includes one or more real time kinematic (RTK) reference stations for receiving GPS signals at established ref... | 04/10/2007 |
| 7193559 | Inertial GPS navigation system with modified kalman filter An inertial (“INS”)/GPS receiver includes an INS sub-system which incorporates, into a modified Kalman filter, GPS observables and/or other observables that span previous and current times. The INS filter utilizes the observables to update position information r... | 03/20/2007 |
| 7187323 | Apparatus for controlling antenna in stratospheric platform and stratospheric platform system having the same Provided is an antenna control apparatus for controlling an antenna mounted on a stratospheric platform of the stratospheric communication system. The apparatus includes a plurality of location signal receivers, each receiver being positioned at each of predefined d... | 03/06/2007 |
| 7184926 | Method for estimating the orientation of a machine A method for estimating the orientation of the machine which provides a motive power unit and a working tool, in which the working tool is pivoted to the motive power unit and carries a 3D sensor and a rotational angle sensor; the method includes collecting a buffer... | 02/27/2007 |
| 7174242 | Ship motion predictor There is disclosed a predictive filter for predicting the future position of a look direction of a rotating directional antenna mounted on a vessel. Prediction of a look direction of the antenna at any instant is made from input of ship's compass data including roll... | 02/06/2007 |
| 7136014 | System and method for estimating the azimuth pointing angle of a moving monopulse antenna An invention is provided for determining the azimuth pointing angle of a moving monopulse antenna. Pulses of energy are broadcast at the surface of a planetary body. Reflected signals are received from the surface of the planetary body using a plurality of feeds. A ... | 11/14/2006 |
| 7123187 | Technique for determining relative yaw using phase windup A technique uses “phase windup” to determine relative yaw of a craft from a plurality circularly polarized signals transmitted from one or more transmission sources. A first difference in carrier phase measurements taken simultaneously at time t1 is d... | 10/17/2006 |
| 7116270 | Method and system for multipath detection A navigation system including a GPS receiver; a variable directivity antenna capable of forming a null point in at least one direction; a null point setting unit for setting the null point of the variable directivity antenna in the direction of a GPS satellite that ... | 10/03/2006 |
| 7107132 | Programmable lawn mower A robotic apparatus for traversing a selected area autonomously that senses orientation relative to the Earth's magnetic field. The robotic apparatus is provided in two models, a master that can record directive and compass readings to provide at least one command r... | 09/12/2006 |
| 7103457 | Programmable lawn mower A robotic apparatus for traversing a selected area autonomously that senses orientation relative to the Earth's magnetic field or other “environmental” signals. The robotic apparatus is provided in two models, a master that can record directive and compass or ... | 09/05/2006 |
| 7089019 | Location systems and cellular communication networks A location system for use in a mobile communication network includes base stations which transmit known signals at predetermined times for use in deriving location data; a first transmitting and receiving units; a unit for determining times of arrival of the known s... | 08/08/2006 |
| 7084769 | Intelligent station using multiple RF antennae and inventory control system and method incorporating same An inventory control system and method that tracks inventories of items with RFID tags, includes a reader unit and an intelligent station that tracks RFID tags to determine item information of items to be inventoried. The reader unit transmits and receives RF signal... | 08/01/2006 |
| 7079075 | GPS rover station for synthesizing synthetic reference phases for controlling accuracy of high integrity positions A positioning system or synthetic phase processor or rover station for providing high integrity positions with graduated accuracies. The positioning system includes one or more real time kinematic (RTK) reference stations for receiving GPS signals at established ref... | 07/18/2006 |
| 7076342 | Attitude sensing apparatus for determining the attitude of a mobile unit An attitude sensing apparatus for determining the attitude of a mobile unit is provided that can reliably estimate an alignment angle between a GPS antenna coordinate system and an IMU coordinate system with good accuracy regardless of the magnitude of the alignment... | 07/11/2006 |
