The Supplementary Measurement Being An Inertial Measurement; E.g., Tightly Coupled Inertial (ipc) Patents (Class 342/357.3)
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Publication number: 20120044104Abstract: A device and method for three-dimensional positioning are provided. The three-dimensional positioning of a common reference point is determined by fusion of supplied measurements, taking into account a lever arm compensation between the reference point, a global navigation satellite system (GNSS) receiver antenna, at least one radar antenna, and an inertial measuring unit.Type: ApplicationFiled: August 17, 2011Publication date: February 23, 2012Applicant: Astrium GmbHInventor: Susanne SCHLOETZER
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Publication number: 20110254729Abstract: Embodiments of the disclosure provide a cross coupled position engine architecture for sensor integration in a Global Navigation Satellite System. In one embodiment, a data processing engine for processing inertial sensor data within a positioning system receiver is disclosed. The data processing engine includes a first input for receiving the sensor data, and a second input for receiving a positioning data. The data processing system also includes a memory and a processor. The processor of the data processing system is coupled to the memory and to the first and second input. The processor of the data processing system is configured to calculate a net acceleration profile data from the inertial sensor data and from the positioning data. The net acceleration profile data calculated by the processor of the data processing system is used for the Global Positioning System (GPS) receiver to subsequently calculate a position and a velocity data.Type: ApplicationFiled: June 17, 2011Publication date: October 20, 2011Applicant: Texas Instruments IncorporatedInventors: Goutam Dutta, Tarkesh Pande, Sandeep Rao, Deric W. Waters
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Publication number: 20110175772Abstract: When a positioning request is made, position measurement using a positioning satellite is executed, and when the position measurement is executed, positioning result data is obtained as position data responded to the positioning request. On the other hand, when the position measurement using the positioning satellite is not executed, position measurement result data based on the measurement of a moving direction and a moving amount is obtained as position data responded to the positioning request.Type: ApplicationFiled: December 17, 2010Publication date: July 21, 2011Applicant: CASIO COMPUTER CO., LTD.Inventor: Masao Sambongi
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Publication number: 20110169689Abstract: An Ultra-Tightly Coupled GPS-inertial navigation system for use in a moving agile platform includes a range residual extractor that uses best curve fitting of a third order polynomial for estimating range residual. The curve-fitted residual is used to update an error Kalman filter. The error Kalman filter includes correction for navigation solution, and IMU and GPS parameters. The navigation solution together with GPS parameter corrections are used in a Tracking Predictor to generate high-sampling-rate carrier and code replicas. The curve-fitting error covariance indicates signal to noise ratio for the tracked GPS signal and may be used for early indication of interference or jamming.Type: ApplicationFiled: August 4, 2009Publication date: July 14, 2011Inventors: Hanching Grant Wang, Bruce Cordell Detterich
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Publication number: 20110140956Abstract: A method for determining geolocation of a mobile device, and a system for performing the method. The mobile device includes a location component, a local positioning component, and a reference positioning component. The method includes determining a local-positioning period based on an identified factor, and obtaining a location fix for the device from the reference positioning component. The method further includes commencing the period and measuring movement using the location component. The method also includes determining a present location of the device, using the location component, based on the location fix and the movement data and, during the period, repeating the measuring and determining steps. The method further includes, after the period expires, updating the location fix with a new location fix from the reference positioning component, resetting the local-positioning period; and repeating the steps for determining location during the reset period using the new location fix.Type: ApplicationFiled: December 15, 2009Publication date: June 16, 2011Inventors: Paul Henry, Christopher Rice
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Patent number: 7962286Abstract: When a CPU 11 controls a drawing control and storage unit 14 according to an operation performed on an operation unit 3 not to perform any navigation display on a monitoring unit 2, the CPU controls a switch SW1 to an off state during a time period during which the CPU does not perform this navigation display, and stops the supply of electric power to a secondary storage unit 13 to stop the operation of this secondary storage unit 13, thereby reducing the consumption of the secondary storage unit.Type: GrantFiled: July 26, 2007Date of Patent: June 14, 2011Assignee: Mitsubishi Electric CorporationInventor: Nobuo Yoshida
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Patent number: 7941759Abstract: A method of improving workflow while performing a network adjustment associated with surveying data is disclosed. A first window containing a plan view which graphically displays at least one input is provided. The input is associated with surveying data. A second window contains a report which displays the input in text form is provided. In sync with each other, the plan view and the report are arranged within a GUI to present at least one network adjustment result utilizing the input. A status of at least one network adjustment result is indicated within the plan view and the report, wherein the status may include an error associated with the input. Additionally, interactive analysis capabilities and interactive modification capabilities are provided, wherein a change in the plan view is reflected in the report and a change in the report is reflected in the plan view.Type: GrantFiled: September 27, 2007Date of Patent: May 10, 2011Assignee: Trimble Navigation LimitedInventors: Ralph Kreissl, Joachim Tappe
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Publication number: 20110084874Abstract: Hybrid system (1) comprising an elementary hybrid system (2) comprising an extended processing module CALC (100) determining a first protection radius of the hybrid system RHG1, associated with a position quantity G, using a first extended variance/covariance matrix MHYPE1 as a function of a predetermined first false alarm probability PFA1, of a predetermined non-integrity level PNI and of a predetermined first probability PP1 of occurrence of an undetected hardware failure of a satellite positioning receiver.Type: ApplicationFiled: September 9, 2010Publication date: April 14, 2011Applicant: THALESInventor: Jacques Coatantiec
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Patent number: 7916070Abstract: A system and method for generating a navigation solution in high interference and dynamic environments using Global Positioning System (GPS) and navigation such as dead reckoning is described. The system configuration is a multi-satellite tracking loop structure obtained by closing each satellite's tracking loop through a multi-state navigation filter. This generates a robust navigation solution that can track GPS signals in a lower signal to noise ratio than can the standard GPS tightly coupled tracking loops. The system contains an Advanced Tightly Coupled (ATC) tracking processor which accepts early, late, and on-time I and Q data from the GPS signal tracker and outputs vehicle to satellite range, range rate and range acceleration residual measurements to a navigation Kalman filter. The ATC includes nonlinear discriminators which transform I and Q data into residual measurements corrupted by unbiased, additive, and white noise.Type: GrantFiled: April 28, 2006Date of Patent: March 29, 2011Assignee: L-3 Communications CorporationInventor: Steven B. Alexander
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Publication number: 20110068973Abstract: A method for upgrading GNSS equipment to improve position, velocity and time (PVT) accuracy, increase PVT robustness in weak-signal or jammed environments and protect against counterfeit GNSS signals (spoofing). A GNSS Assimilator couples to an RF input of existing GNSS equipment, e.g., a GPS receiver, and extracts navigation and timing information from available RF signals, including non-GNSS signals, or direct baseband aiding, e.g., from an inertial navigation system, frequency reference, or GNSS user. The Assimilator fuses the diverse navigation and timing information to embed a PVT solution in synthesized GNSS signals provided to a GNSS receiver RF input. The code and carrier phases of the synthesized GNSS signals are aligned with those of actual GNSS signals to appear the same at the target receiver input. The Assimilator protects against spoofing by continuously scanning incoming GNSS signals for signs of spoofing, and mitigating spoofing effects in the synthesized GNSS signals.Type: ApplicationFiled: September 23, 2010Publication date: March 24, 2011Applicant: COHERENT NAVIGATION, INC.Inventors: Todd E. Humphreys, Brent M. Ledvina, William J. Bencze, Bryan T. Galusha, Clark E. Cohen
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Patent number: 7911380Abstract: The invention relates to a method of determining the position of an aircraft by combining inertial data with range data between the aircraft and satellites, in which: a) the range is stored in a FIFO memory so as make delayed range data available at the output from the memory; b) the delayed range data is combined with inertial data to obtain an estimate of position data for the aircraft; and c) a watch is maintained for the appearance of a fault in the range data, and when such a fault is detected, at least some of the data stored in the FIFO memory is modifying so as to be neutralized.Type: GrantFiled: February 12, 2007Date of Patent: March 22, 2011Assignee: EurocopterInventor: Jean-Paul Petillon
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Patent number: 7904243Abstract: Data from GPS satellites within the field of view of a ground station are retransmitted to LEO satellites, such as Iridium satellites, and cross-linked if necessary before being transmitted to a user. The user is then able to combine the fed-forward data with data received directly from GPS satellites in order to resolve errors due to interference or jamming. Iridium and data aiding thus provides a means for extending GPS performance under a variety of data-impaired conditions because it can provide certain aiding information over its data link in real time.Type: GrantFiled: June 22, 2004Date of Patent: March 8, 2011Assignee: The Boeing CompanyInventors: Clark Cohen, Bart Ferrell, Greg Gutt, David Whelan
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Publication number: 20110050488Abstract: A positioning method whereby inertial positioning data is calculated based upon measurements of an Inertial Navigation System. Virtual satellite ranging data is then generated based upon the inertial positioning data. The virtual satellite ranging data is then combined with received satellite ranging data from one or more satellites forming part of a Global Navigation Satellite System (GNSS). A GNSS positioning solution is then calculated based upon the combined received satellite ranging data and the virtual satellite ranging data.Type: ApplicationFiled: September 26, 2008Publication date: March 3, 2011Applicant: LEICA GEOSYSTEMS AGInventors: Anthony Cole, William Kellar
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Publication number: 20100309042Abstract: The invention described herein relates to aiding a Satellite Positioning System (SPS) receiver of a platform with a data interface to the platform data. The platform, for example, could be a vehicle, ship, aircraft, or a pedestrian. The SPS receiver would be used to track the location of the platform. The data interface would facilitate access by the SPS receiver to the data of the platform, and the SPS receiver in turn could provide SPS data (such as position, speed, and heading) to the platform. A further aspect of the invention includes hardware or software used by the data interface and the SPS receiver to provide, format, time-stamp, synchronize, and match platform data or SPS receiver data.Type: ApplicationFiled: September 14, 2006Publication date: December 9, 2010Inventors: Jaime B. Colley, Lars Boeryd
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Publication number: 20100299066Abstract: An apparatus comprising a position system configured to determine a global positioning (GPS) change vector, and an inertial navigation system (INS) change vector. The position system is configured to determine a relative position between a first platform and a second platform based on the GPS change vector and the INS change vector, and the position system is configured to correct a GPS position calculation error based on the GPS change vector and the INS change vector.Type: ApplicationFiled: May 20, 2009Publication date: November 25, 2010Inventors: Gang Kevin Liu, Robert John Buchler
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Publication number: 20100283670Abstract: To provide a GPS compound device having a configuration including a GPS receiver, that accurately determines abnormality in an output from the GPS receiver based on a difference between a GPS pseudorange measurement and a Doppler frequency measurement, when detecting the abnormality in the outputs from the GPS receiver, while avoiding continuation of the abnormality at the time of the abnormality determination resulting from estimation errors of the GPS pseudorange measurement and the Doppler frequency measurement. When the abnormality of the outputs from the GPS receiver are detected, an abnormal period is counted. When the count value is below a predetermined threshold, the outputs from the GPS receiver are treated as abnormal, and after it exceeded the threshold, the outputs from the GPS receiver are treated as normal. Thus, the abnormality of the outputs from the GPS receiver can be determined accurately.Type: ApplicationFiled: October 26, 2007Publication date: November 11, 2010Applicant: Furuno Electric Company LimitedInventor: Hiroyuki Toda
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Publication number: 20100265126Abstract: The invention provides a positioning system. In one embodiment, the positioning system comprises a Global Navigation Satellite System (GNSS) module, a dead reckoning module, a Geographic Information System (GIS) module, and an calculating module. The GNSS module generates a first positioning data according to satellite communication. The dead reckoning module estimates a second positioning data according to a sensor's measurement data, the first positioning data, and a feedback positioning data of a previous epoch. The GIS module fits the first positioning data to a map to generate a third positioning data taken as a final output of the positioning system. The calculating module integrates the third positioning data and the second positioning data according to predetermined weights to obtain the feedback positioning data of a current epoch, which is recursively fed back to the dead reckoning module for a next estimation.Type: ApplicationFiled: June 30, 2010Publication date: October 21, 2010Applicant: MEDIA TEK INC.Inventor: Jen-Hao Mao