Providing Data For Correcting Measured Positioning Data; E.g., Dgps [differential Gps] Or Ionosphere Corrections (ipc) Patents (Class 342/357.44)
  • Patent number: 10598792
    Abstract: An augmentation information adjustment unit (102) reduces an amount of information in augmentation information by combining: update cycle adjustment processing (1021) to set an update cycle of the augmentation information to be an integer multiple of a predetermined update cycle; geographic interval error value adjustment processing (1022) to reduce the number of geographic interval error values by selecting from among a plurality of the geographic interval error values each of which is an error at every predetermined geographic interval out of a plurality of error values, a geographic interval error value at every geographic interval that is an integer multiple of the predetermined geographic interval; and bit count adjustment processing (1023) to reduce a bit count of the error value for each error value.
    Type: Grant
    Filed: November 26, 2015
    Date of Patent: March 24, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masakazu Miya, Seigo Fujita, Yoshihiro Shima, Hisao Sone, Ryoichiro Yasumitsu, Natsuki Kondo, Tsutomu Nakajima, Kazuhiro Terao, Masayuki Saito
  • Patent number: 10592935
    Abstract: An event recording is received. The event is associated with an event entity and occurs over an event duration at an event location. A tag is received responsive to user interaction with a communication device. The tag is associated with at least one of the particular entity associated with the event entity, a particular time period associated with the event duration, and a particular location associated with the event location. Additional information associated with the event recording is received, and the tag is matched with at least a portion of the event recording based on at least one of the particular entity, the particular time period, and the particular location associated with the received tag. The portion of the event recording matching the received tag is presented for review along with the received additional information associated with the event recording.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: March 17, 2020
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Luis Albisu, Joseph Bentfield
  • Patent number: 10473790
    Abstract: A system for generating satellite positioning corrections includes a global correction module that generates a set of global pre-corrections based on modeling of global positioning error, a set of local correction modules that, for each local correction module of the set, takes input from a unique reference source and generates a set of local pre-corrections based on modeling of local positioning error; and a correction generator that generates a positioning correction from the set of global pre-corrections and the sets of local pre-corrections to correct a position of the mobile receiver.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: November 12, 2019
    Assignee: Swift Navigation, Inc.
    Inventors: Fergus Noble, Anthony Cole
  • Patent number: 10439799
    Abstract: Indirect fire protocol according to several embodiments of the present invention can include the initial step establishing a grid and locating a forward observer (FO) and a firing unit (FU) in the grid. The FO can estimate the bearing and range to a High Value Target (HVT) within the grid, and can homomorphically encrypting said HVT estimated position data. FO can then transmit the encrypted HVT estimated position data over cloud network architecture to a Fire Direction Center (FDC), using the FDC's Keypublic. The FDC can outsource the calculation of an absolute position of said HVT in said grid to non-secure internet cloud architecture, but with encrypted HVT estimation data and the FO position data in the grid (which the FDC knows). Once calculated, the HVT encrypted absolute position data can be decrypted, and then transmitted from FDC to a FU, using the FU's Keypublic.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: October 8, 2019
    Assignee: United States of America as represented by Secretary of the Navy
    Inventors: Mamadou H. Diallo, Roger Alexander Hallman, Michael Anthony August, Megan Elane Monteverde Kline, Henry Gwok Wing Au
  • Patent number: 10386202
    Abstract: A navigation system for determining quality and integrity of source information includes one or more data sources that provide the source information, a situation module that provides situation data, an information module that determines an estimate of the quality and an estimate of the integrity of the source information based on the source information and the situation data, an integrity monitor module that determines the integrity and the quality of the source information based on the estimate of the quality and the estimate of the integrity of the source information from the information module, and that validates the source information based on the integrity of the source information and/or the quality of the source information, and a navigation state estimator that determines the navigation information of the one or more objects based on the validated source information and corresponding quality of the source information received from the integrity monitor module.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: August 20, 2019
    Assignee: The Charles Stark Draper Laboratory, Inc.
    Inventors: Michael Aucoin, Juha-Pekka J. Laine
  • Patent number: 10380889
    Abstract: Examples provided herein describe a method for determining car positions. For example, a physical processor of an edge computing device may receive position data for a legacy car and information about a make and model of the legacy car. The first edge device may also receive, from a sensor-rich car, a set of sensor data about a set of observed cars in the vicinity of the sensor-rich car, a set of position data for the set of observed cars, and a set of visual data of the set of observed cars, wherein the set of observed cars includes the legacy car and the sensor-rich car. The edge device may then determine an updated position for the legacy car based on the set of position data for the set of observed cars, the set of visual data, and the set of sensor data and provide the updated position of the legacy car.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: August 13, 2019
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Puneet Jain, Soteris Demetriou, Kyu-Han Kim
  • Patent number: 10241844
    Abstract: First and second circuits in an integrated circuit that generate local hot spots are activated at different times in order to reduce heat generation within each of the first and second circuits. The first and second circuits in the integrated circuit have the same circuit architecture. The first circuit processes data during a first time period, and heat generation is reduced in the second circuit during the first time period. A data path of the data is then switched from the first circuit to the second circuit. The second circuit then processes the data during a second time period after the first time period, and heat generation is reduced in the first circuit during the second time period. The data path of the data is then switched from the second circuit back to the first circuit. The first circuit then processes the data again.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: March 26, 2019
    Assignee: Intel Corporation
    Inventors: David Mendel, Rajiv Kane
  • Patent number: 10234562
    Abstract: A method and system for delivery of location-dependent time-specific corrections. In one embodiment, a first extended-lifetime correction for a first region is generated. A distribution timetable is used to determine a first time interval for transmitting the first extended-lifetime correction to the first region. The first extended-lifetime correction is then transmitted via a wireless communication network to said first region in accordance with said distribution timetable.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: March 19, 2019
    Assignee: Trimble Inc.
    Inventors: James M. Janky, Ulrich Vollath, Nicholas C. Talbot
  • Patent number: 10122831
    Abstract: A method comprises obtaining data points, each comprised of a time stamp and measurement; dividing the data points into sequences of consecutive data points; limiting the maximum time between consecutive data points in the same sequence; limiting the maximum time between the earliest and latest data points in each sequence; calculating a polynomial of lowest transmission cost for each sequence; limiting the approximation error between the data points in a sequence and the associated polynomial; and transmitting, to a server, data based on the calculated polynomial.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: November 6, 2018
    Assignee: HERE Global B.V.
    Inventors: Jeffrey Adachi, Xiaoqing Liu
  • Patent number: 9922570
    Abstract: Systems and methods for predicting aircraft navigation performance are provided. In one embodiment, a method can include determining that one or more navigational aid measurements are not available to the aircraft. The method can include estimating a future actual navigation performance of the aircraft for a future point in the flight plan. The method can include determining a future required navigation performance associated with the future point in the flight plan. The method can include comparing the future actual navigation performance to the future required navigation performance to determine if the future actual navigation performance satisfies the future required navigation performance. The method can include providing, to an onboard system of the aircraft, information indicative of whether the future actual navigation performance satisfies the future required navigation performance.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: March 20, 2018
    Assignee: GE Aviation Systems, LLC
    Inventor: Gregory Alan Stark
  • Patent number: 9798011
    Abstract: Methods and apparatuses to assist a global positioning system (GPS) module to determine GPS position estimates for a wireless communication device is disclosed. Processing circuitry in the wireless communication device determines a potential or an actual inaccuracy in a GPS position estimate obtained from a GPS module. The processing circuitry obtains a set of map vector data stored in or associated with the wireless communication device. The processing circuitry determines a location estimate of the wireless communication device based on at least a portion of the set of map vector data. The processing circuitry provides the location estimate to the GPS module and obtains an updated GPS position estimate from the GPS module, the updated GPS position estimate based at least in part on the location estimate provided to the GPS module.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: October 24, 2017
    Assignee: Apple Inc.
    Inventors: Glenn D. MacGougan, Robert W. Mayor, Stephen J. Rhee
  • Patent number: 9784846
    Abstract: Systems, methods, and apparatuses are provided for compensating for ionospheric delay in multi constellation Global Navigation Satellite Systems (GNSSs). In one method, a single Radio Frequency (RF) path receiver receives a first signal at a first frequency from a first satellite in a first GNSS constellation, receives a second signal at a second frequency from a second satellite in a second GNSS constellation, and calculates the ionospheric delay using the received first signal and the received second signal.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: October 10, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Phanikrishna Sagiraju, William Nolte
  • Patent number: 9733359
    Abstract: Methods and apparatus for processing of GNSS data derived from multi-frequency code and carrier observations are presented which make available correction data for use by a rover located within the region, the correction data comprising: the ionospheric delay over the region, the tropospheric delay over the region, the phase-leveled geometric correction per satellite, and the at least one code bias per satellite. In some embodiments the correction data includes an ionospheric phase bias per satellite. Methods and apparatus for determining a precise position of a rover located within a region are presented in which a GNSS receiver is operated to obtain multi-frequency code and carrier observations and correction data, to create rover corrections from the correction data, and to determine a precise rover position using the rover observations and the rover corrections.
    Type: Grant
    Filed: February 14, 2011
    Date of Patent: August 15, 2017
    Assignee: Trimble Inc.
    Inventors: Xiaoming Chen, Ulrich Vollath, Kendall Ferguson
  • Patent number: 9733364
    Abstract: Methods and systems for a dual mode global navigation satellite system may comprise selectively enabling a medium Earth orbit (MEO) radio frequency (RF) path and a low Earth orbit (LEO) RF path in a wireless communication device to receive RF satellite signals. The signals may be processed to determine a position of the wireless device. The signals may be digitized and buffered before further processing. The RF paths may be time-division duplexed by the selective enabling of the MEO and LEO paths. Acquisition and tracking modules in the MEO RF path may be blanked when the LEO RF path is enabled. The MEO RF path may be powered down when the LEO RF path is enabled. The signals may be down-converted to an intermediate frequency before down-converting to baseband frequencies or may be down-converted directly to baseband frequencies. In-phase and quadrature signals may be processed.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: August 15, 2017
    Assignee: Maxlinear, Inc.
    Inventors: Maxime Leclercq, Ioannis Spyropoulos, Nishant Kumar
  • Patent number: 9651664
    Abstract: A space-based augmentation system improving the accuracy and reliability of satellite navigation system data includes, each at least: a ground station transmitting data to satellites, a ground station receiving signals transmitted by a satellite and by a satellite equipped with transmitting/receiving means for transmitting data received from the ground transmitting station for a given geographical area; two ground computing centers, redundantly and respectively calculating navigation message streams and transmitting to the ground transmitting station navigation message streams and information representative of Quality of Service provided by the system, from signals transmitted by the ground receiving stations. The computing centers, ground receiving station and ground transmitting station are connected by a communication network.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: May 16, 2017
    Assignee: Thales
    Inventors: Bernard Charlot, Gonzagues Bertin De La Hautiere, Sebastien Trilles
  • Patent number: 9645241
    Abstract: Positioning data generated by the positioning module of a portable device is received. The positioning data was generated using signals received at the portable receiver from respective signal sources (such as satellites). Positioning data generated by one or more non-surveyed devices is also received. The positioning data from the one or more non-surveyed devices has a high degree of reliability as compared with the position data from the portable device. The highly reliable positioning data from the one or more non-surveyed devices is further processed to develop positioning corrections for the portable device.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: May 9, 2017
    Assignee: GOOGLE INC.
    Inventor: Fred P. Pighin
  • Patent number: 9612340
    Abstract: Systems, methods, devices and subassemblies for creating and delivering crowd-sourced GNSS models include receiving at one or more navigation receivers first signals transmitted by one or more navigation beacons, determining by the navigation receivers first navigation observables based on the received first signals, receiving at an augmentation server information associated with the first navigation observables, determining by the augmentation server augmentation information based on at least the received information associated with the first navigation observables and computational models, transmitting the augmentation information to the navigation receivers, receiving by the navigation receivers the augmentation information, receiving by the navigation receivers second signals transmitted by the one or more navigation beacon, determining by the navigation receivers second navigation observables based on the received second signals and determining by the navigation receivers a respective high-precision posi
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: April 4, 2017
    Assignee: Apple Inc.
    Inventors: Isaac T. Miller, Brent M. Ledvina
  • Patent number: 9611057
    Abstract: A three-dimensional map of an environment with buildings is used to computationally predict locations and times of global navigation satellite system (GNSS) blockages. For example, in urban environments some of the GNSS satellites are occluded by buildings. These blockages can be modeled. A computing system can make a map showing which satellites are or are not visible as a function both of location and time. The map can be used by a mobile GNSS receiver to determine which satellites to use or whether to use a backup system for navigation. The system can determine when a given satellite will enter or leave a GNSS receiver view during a route. The map can be stored in the GNSS receiver (or a host of the GNSS) or can be stored by a network service. This mapping can be used to predict multi-path effects of a satellite transmission at a location.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: April 4, 2017
    Assignee: ELWHA LLC
    Inventors: Tom Driscoll, Joseph R. Guerci, Russell J. Hannigan, Roderick A. Hyde, Muriel Y. Ishikawa, Jordin T. Kare, Nathan P. Myhrvold, David R. Smith, Clarence T. Tegreene, Yaroslav A. Urzhumov, Charles Whitmer, Lowell L. Wood, Jr., Victoria Y. H. Wood
  • Patent number: 9578452
    Abstract: A method and mobile terminal for communicating with a smart card. The method includes transmitting, to the smart card, terminal profile information; receiving, from the smart card, a geographical location request for acquiring a current geographical location based on the terminal profile information; and transmitting, to the smart card, a terminal response indicating whether the geographical location request has been successfully processed. The mobile terminal processes only one of multiple geographical location requests based on a receiving order, when the multiple geographical location requests are received from the smart card.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: February 21, 2017
    Assignee: LG ELECTRONICS INC.
    Inventor: Paul Jolivet
  • Patent number: 9541626
    Abstract: A method, apparatus and system for globally referenced positioning in a shielded environment includes integrating and correlating information from a UWB receiver, a GPS receiver, and a bent-path GPS receiver adapted to extract a GPS radio frequency wave from a heterodyned GPS signal. The method, apparatus, and system is resistant to interference and can be used in a shielded environment such as indoors or behind a line-of-sight barrier.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: January 10, 2017
    Assignee: Lightwaves Systems, Inc.
    Inventors: Bruce D. Melick, David M. Snyder, Leslie D. Baych, Philip T. Kennedy
  • Patent number: 9429658
    Abstract: Methods and systems for a dual mode global navigation satellite system may comprise selectively enabling a medium Earth orbit (MEO) radio frequency (RF) path and a low Earth orbit (LEO) RF path in a wireless communication device to receive RF satellite signals. The signals may be down-converted to determine a position of the wireless device. The signals may be down-converted utilizing local oscillator signals from a phase locked loop (PLL). The RF paths may be time-division duplexed by the selective enabling of the MEO and LEO paths. Acquisition and tracking modules in the MEO RF path may be blanked when the LEO RF path is enabled. The MEO RF path may be powered down when the LEO RF path is enabled. The signals may be down-converted to an intermediate frequency before down-converting to baseband frequencies or may be down-converted directly to baseband frequencies. In-phase and quadrature signals may be processed.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: August 30, 2016
    Assignee: Maxlinear, Inc.
    Inventors: Maxime Leclercq, Ioannis Spyropoulos, Nishant Kumar
  • Patent number: 9395384
    Abstract: A system estimates the speed of a moving vehicle and hence the driving behavior of an individual driving the vehicle using accelerometer data when GPS is intermittent, unavailable, or inaccurate. To do so, the system may first determine time periods when GPS data is not available. For each time period, the system may analyze the accelerometer data to find idling points when the vehicle is not moving. Based on the idling points, the system may divide each time period into segments. The system may then determine the speed of the vehicle at the boundary points of each segment. For each segment, the system may analyze the accelerometer data to determine the acceleration of the vehicle for points when the vehicle is moving. Subsequently, the system may calculate the speed of the vehicle for the points when the vehicle is moving based on the acceleration of the vehicle at those points and the speed of the vehicle at the boundary points.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: July 19, 2016
    Assignee: STATE FARM MUTUAL AUTOMOBILE INSURANCE COMPANY
    Inventors: David J. Dosher, Scott T. Christensen, Sunish Shreenarayan Menon
  • Patent number: 9274230
    Abstract: Methods and apparatus are presented for determining position a GNSS rover antenna from single-frequency observations of GNSS signals collected at the antenna over multiple epochs and from correction data for at least one of the epochs. Coded raw data prepared from the single-frequency observations in a binary format are obtained and decoded to obtain decoded raw data. The decoded raw data are used to construct multiple epochs of measurement data of time, range and phase. Correction data are obtained for at least one of the epochs. The measurement data are processed with the correction data in a realtime kinematic positioning engine to obtain a position estimate for each of a plurality of epochs.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: March 1, 2016
    Assignee: Trimble Navigation Limited
    Inventors: Igor Artushkin, Alexey Boriskin, Dmitry Ivanov, Dmitry Kozlov, Evgeny Sunitsky, Gleb Zyryanov
  • Patent number: 9255992
    Abstract: A DGNSS-based guidance system, wherein a rover receiver first utilizes data from a master base station transceiver, a DGNSS reference network, or some other differential source to compute a differentially corrected location to establish a reference DGNSS relationship. Using this location and data observed only at the rover, the rover computes an internal set of differential corrections, which set is stored in computer memory, updated as necessary, and applied in future times to correct observations taken by the rover. As the rover enters into areas of other base station receiver reference networks, the rover transceiver will send positional information it receives from the master base station to the new, secondary base station. The secondary base station then calibrates its own reference information using information sent from the original master base station.
    Type: Grant
    Filed: August 12, 2014
    Date of Patent: February 9, 2016
    Assignee: AgJunction, LLC
    Inventor: John A. McClure
  • Patent number: 9110157
    Abstract: A wireless location/position computation system, device, and method are directed to multiple aid-data sources each providing location-related aid information, a wireless device configured to communicate with the aid-data sources, and a location computation module either integrated with or external to the wireless device. The wireless device may include a transceiver to communicate wireless, data and other signals. The wireless device may receive a position request to compute a position of the wireless device, and in response, initiate a compute-position session. In the compute-position session, the wireless device sends aid requests to and retrieves the location-related aid information from the aid-data sources and processes the location-related aid information from the aid-data sources to generate integrated location information.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: August 18, 2015
    Assignee: Intel Corporation
    Inventors: Tirosh Levin, Tomer Daniel
  • Patent number: 9057613
    Abstract: A system for validating a correction to map data for a geographic location, the system comprising: a processing resource; and a navigation device; wherein the processing resource comprises: a user request generator that is configured to generate a user request for transmission to the navigation device; a transmitter for transmitting the generated user request to the navigation device; and a receiver for receiving a user response from said navigation device; and the navigation device comprises: a receiver for receiving the user request transmitted from the processing resource; a user request module configured to present said received user request to a user of the navigation device; a user response module for capturing a user response to said presented user request, and a transmitter for transmitting said captured user response to said processing resource.
    Type: Grant
    Filed: August 22, 2013
    Date of Patent: June 16, 2015
    Assignee: TOMTOM INTERNATIONAL B.V.
    Inventors: Paulus Gruijters, Robert Lukassen
  • Publication number: 20150145722
    Abstract: Systems and methods for using SBAS delay measurements to mitigate ionospheric error are provided. In an embodiment, an array of ionospheric delay measurements of a GNSS is provided, wherein a pierce point is associated with each delay measurement in the array. Further, at least one first element in the array and at least one second element in the array that has a different pierce point than the at least one first element are selected and it's determined whether the difference between the delay measurement of the at least one first element and the delay measurement of the at least one second element is less than a threshold. A level of inflation of error due to geometric screening techniques is adjusted if the difference between the delay measurement of the at least one first element and the delay measurement of the at least one second element is less than the threshold.
    Type: Application
    Filed: February 3, 2014
    Publication date: May 28, 2015
    Applicant: Honeywell International Inc.
    Inventors: Bruce G. Johnson, Kim A. Class
  • Patent number: 8912952
    Abstract: A global positioning system device and an ionosphere error estimation method thereof are provided. The global positioning system device is connected to a plurality of dual-band base stations, and receives a plurality of ionosphere pierce point coordinates and a plurality of ionosphere errors from the dual-band base stations. The global positioning system device calculates a user ionosphere error by an interpolation method based on the ionosphere pierce point coordinates and the ionosphere errors of the dual-band base stations and a user ionosphere pierce point coordinate of the global positioning system device.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: December 16, 2014
    Assignee: Institute for Information Industry
    Inventors: Ming Yang, Shau-Shiun Jan, An-Lin Tao, Chih-Hung Li, Shan-Yuan Yang
  • Publication number: 20140347215
    Abstract: Disclosed herein is a mounting device for an antenna, including: a first supporting part fixed to any geodetic point in a first direction and having a first length; a second supporting part extended from the first supporting part in a second direction and having a second length; a first mounting part extended from a first point of the second supporting part in the first direction and mounted with a first antenna receiving a first satellite navigation signal transmitted from a navigation satellite; and a second mounting part extended from a second point of the second supporting part in the first direction and mounted with a second antenna receiving a second satellite navigation signal transmitted from the navigation satellite.
    Type: Application
    Filed: February 13, 2014
    Publication date: November 27, 2014
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Seong-Kyun JEONG, Sang-Uk LEE, Jae-Hoon KIM
  • Patent number: 8842041
    Abstract: The present invention provides a system for increasing the reliability of location data received from a container monitoring unit. According to a first embodiment, the system includes a GPS mesh network device to communicate with existing GPS devices and a remote monitoring station which receives data from unit devices applying back-end analysis for determining the most accurate and robust geo-location for each unit. The present invention provides a method to coordinate analysis of data to improve determination of the exact location and status of assets. This increased visibility will enable the customer to pinpoint the real time location of a single box more. This level of real time asset management translates into greater operational efficiency and performance, cost reductions, and improved safety and security.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: September 23, 2014
    Assignee: GlobalTrak, LLC
    Inventor: Richard C. Meyers
  • Publication number: 20140266877
    Abstract: A global navigation satellite system (GNSS) based precision accuracy navigation and location system includes a Smart device with a hardwired Wi-Fi or Bluetooth connection to a GNSS receiver. Differential GNSS corrections are received over the Internet from a base receiver for precision accuracy positioning, GIS, navigation and other applications.
    Type: Application
    Filed: March 17, 2014
    Publication date: September 18, 2014
    Applicant: AgJunction LLC
    Inventors: John A. McClure, Landon Morris, Greg S. Guyette
  • Patent number: 8803735
    Abstract: A DGNSS-based guidance system, wherein a rover receiver first utilizes data from a master base station transceiver, a DGNSS reference network, or some other differential source to compute a differentially corrected location to establish a reference DGNSS relationship. Using this location and data observed only at the rover, the rover computes an internal set of differential corrections, which set is stored in computer memory, updated as necessary, and applied in future times to correct observations taken by the rover. As the rover enters into areas of other base station receiver reference networks, the rover transceiver will send positional information it receives from the master base station to the new, secondary base station. The secondary base station then calibrates its own reference information using information sent from the original master base station.
    Type: Grant
    Filed: November 20, 2011
    Date of Patent: August 12, 2014
    Assignee: AgJunction LLC
    Inventor: John A. McClure
  • Patent number: 8760344
    Abstract: A method for processing radionavigation signals coming from satellites that broadcast the radionavigation signals on at least two distinct frequencies, comprises receiving the signals for each satellite, realizing, for each satellite, non-differentiated measurements of code and phase (10), determining the widelane ambiguities in a coherent manner on the group of satellites (12, 13, 14) by using the widelane biases associated with the satellites, received from a reference system, and global positioning of the receiver with the help of measurements of code and phase and the coherent widelane ambiguities (16, 18). The global positioning comprises, for each satellite, the determination (16) of a pseudo distance by means of an ionosphere-free combination of the measurements of code and of the difference of the phase measurements, compensated for the widelane ambiguity, this ionosphere-free combination being optimized in terms of noise.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: June 24, 2014
    Assignee: Centre National d'Etudes Spatiales
    Inventors: Flavien Mercier, Denis Laurichesse
  • Publication number: 20140132444
    Abstract: This application discloses a GNSS reference apparatus having a vector error generator and a reference data server. The vector error generator generates one or more sequences of keyed intentional errors made confidential with confidential error keys, and then combines the sequences to generate a sequence of reference erroneous positions. The reference data server issues GNSS position-determination reference data based on the reference erroneous positions where the keyed intentional errors for at least one of the confidential sequences are reversible with confidential access to the corresponding confidential error key for determining a GNSS-based position.
    Type: Application
    Filed: November 13, 2012
    Publication date: May 15, 2014
    Inventor: David G. Bird
  • Patent number: 8723725
    Abstract: In one embodiment, a method for ionospheric delay compensation is provided. The method includes determining an ionospheric delay based on a signal having propagated from the navigation satellite to a location below the ionosphere. A scale factor can be applied to the ionospheric delay, wherein the scale factor corresponds to a ratio of an ionospheric delay in the vertical direction based on an altitude of the satellite navigation system receiver. Compensation can be applied based on the ionospheric delay.
    Type: Grant
    Filed: November 23, 2011
    Date of Patent: May 13, 2014
    Assignee: Honeywell International Inc.
    Inventors: Hui Zhao, John Savoy
  • Patent number: 8665146
    Abstract: This invention relates to the troposphere delay produced when the electromagnetic waves from a satellite or astronomical body pass through the troposphere, in particular, it is related to a calculation method of an estimated value of the amount of zenith troposphere delay in real time, and troposphere delay of the satellite positioning signal in the case of positioning using the estimated value of this calculated amount of zenith troposphere delay is related with a correcting method.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: March 4, 2014
    Assignee: Electronic Navigation Research Institute
    Inventors: Noboru Takeichi, Takeyasu Sakai, Sounosuke Fukushima, Ken Ito
  • Patent number: 8659474
    Abstract: A system and method for providing improved correction information to navigation receivers includes receiving, from a plurality of reference stations at known locations, a plurality of satellite navigation measurements of signals from a plurality of global navigation satellites. A state of the plurality of global navigation satellites is computed based on the received satellite navigation measurements. Baselines, each corresponding to a pair of the reference stations, are identified. For each identified baseline, computing floating and integer values for a double-differenced integer ambiguity. Double-differenced integer ambiguities that satisfy a set of predefined conditions are identified, and the computed state of the plurality of global navigation satellites is adjusted in accordance with an integer value constraint applied to each double-differenced integer ambiguity that satisfies the set of predefined conditions.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: February 25, 2014
    Assignee: Navcom Technology, Inc.
    Inventors: Liwen L. Dai, Ronald R. Hatch, Yujie Zhang, Min Wang
  • Patent number: 8660586
    Abstract: A method in a mobile terminal for estimating a position of the mobile terminal includes: receiving an expected measurement map indicative of an expected measurement of a parameter by the mobile terminal; receiving parameters of a matrix corresponding to the expected measurement map; capturing, by the mobile terminal, actual measurements of the parameter for a plurality of communication devices; and utilizing the received parameters and actual measurements to estimate the position of the mobile terminal, where each of the actual measurements and the expected measurement map comprise values indicative of a delay in a communication path between the mobile terminal and one or more of the plurality of communication devices.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: February 25, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Ravi Palanki, Ayman Fawzy Naguib
  • Patent number: 8633852
    Abstract: A first position of a satellite is calculated at a first time in dependence on received orbit data corresponding to an orbit path of the satellite. Anan orbit path of the satellite is modeled from the first position at the first time to a second time to determine a second position of the satellite at the second time. A third position of the satellite is then calculated at the second time in dependence on the received orbit data. The second position and third position are compared to determine a validity of the orbit data.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: January 21, 2014
    Assignee: STMicroelectronics (Research & Development) Limited
    Inventor: Peter Bagnall
  • Patent number: 8630805
    Abstract: A method of mapping a space using a combination of radar scanning and optical imaging. The method includes steps of providing a measurement vehicle having a radar system and an image acquisition system attached thereto; aligning a field of view of the radar system with a field of view of the image acquisition system; obtaining at least one radar scan of a space using the radar scanning system; obtaining at least one image of the space using the image acquisition system; and combining the at least one radar scan with the at least one image to construct a map of the space.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: January 14, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Jan Becker, Oliver Schwindt
  • Patent number: 8626435
    Abstract: A method for determining location such as vehicle location receives data at a predetermined frequency, validates the received data, stores the received data based on the validation and computes a location based on the stored data. The validation includes verifying a presence of particular data substrings within the received data, verifying a presence of a plurality of data fields within each data substring, computing a parameter based on information contained in two of the plurality of data fields and comparing the computer parameter with a pre-defined threshold.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: January 7, 2014
    Assignee: Volvo Group North America LLC
    Inventors: Raymond Gardea, James Gwynn, John Bate
  • Patent number: 8604966
    Abstract: A method determines the atmospheric refraction of a radar beam by utilizing a stabilized optical telescope directed toward a star near the radar target location. This allows measuring the target refraction as observed from ships at sea without a-priori knowledge of the local refraction index or weather conditions in the target area. The telescope may employ an infra-red (IR) sensor and is capable of imaging stars. The atmospheric refraction of the star light is determined by pointing the telescope based on star ephemeris data, and measuring the star image deviation from the center of the telescope's field-of-view (FOV). The corresponding refraction of the radar beam can be determined by employing a conversion factor relating the IR-to-RF atmospheric propagation characteristics. This conversion factor can be obtained by dedicated tracking measurements.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: December 10, 2013
    Assignee: Lockheed Martin Corporation
    Inventors: Jerzy W. Luk-Paszyc, Jonathan A. Boardman
  • Patent number: 8599065
    Abstract: Disclosed herein is a Satellite Based Augmentation System (SBAS) receiver. The SBAS receiver is configured to receive SBAS messages containing augmentation data and to provide one or more served GPS receivers with augmentation information based on the augmentation data extracted from the received SBAS messages. The SBAS receiver is designed to implement a Finite State Machine (FSM) intended to be common to all served GPS receivers, and configured to evolve based on the received SBAS messages and to store the augmentation data contained therein. The common FSM is further configured to cooperate with a number of correction modules equal to the number of served GPS receivers, each correction module being configured to receive GPS data from a corresponding served GPS receiver, and to compute an augmented position for the corresponding served GPS receiver based on the corresponding GPS data and on augmentation data retrieved from the common FSM.
    Type: Grant
    Filed: March 20, 2008
    Date of Patent: December 3, 2013
    Assignee: Telespazio S.p.A.
    Inventors: Filippo Rodriguez, Gian Paolo Plaia
  • Patent number: 8583146
    Abstract: A method in a mobile terminal for estimating a position of the mobile terminal includes: receiving an expected measurement map indicative of expected measurement values of a parameter; receiving parameters of a matrix corresponding to the expected measurement map; capturing actual measurement values of the parameter for a plurality of communication devices; and utilizing the received parameters and actual measurement values to estimate a position of the mobile terminal, where the expected measurement map includes, for each of a plurality of hypothesis locations (Loc(i,j)), a set of expected measurement values ({right arrow over (?)}Loc(i,j)) containing expected measurements for the parameter, each of the expected measurements corresponding to a respective communication device of the plurality of communication devices.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: November 12, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Ravi Palanki, Ayman Fawzy Naguib
  • Patent number: 8570216
    Abstract: System, methods, and devices for a self-sustaining differential corrections network that employs roving reference devices (RRDs) as reference stations for improving positioning, navigation, and timing (PN&T) solutions for other enabled local roving and/or stationary receiving devices (RDs) are disclosed herein. The disclosed differential correction system enhancement leverages RRDs enabled for a non-global positioning system (non-GPS), secondary PN&T signal to characterize local errors. These local errors are then used by local RDs in combination with a signal to calculate an improved PN&T estimate for the RDs.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: October 29, 2013
    Assignee: The Boeing Company
    Inventors: Gregory M. Gutt, Arun Ayyagari, David A. Whelan, Michael Lee O'Connor, David G. Lawrence
  • Patent number: 8564480
    Abstract: A system for augmenting the availability and performance of a satellite geolocation system uses a behavior model of at least one of the satellites of the satellite geolocation system. The behavior model includes parameters with which to augment the nominal operating range of the geolocation system. The behavior model also includes an indicator of the deviation between the behavior model and the real behavior of the at least one satellite, to enable a receiver to continue to use at least one satellite to determine the position of the receiver using the behavior model outside the nominal operating range of the satellite geolocation system. The parameters of the behavior model include at least a model of distortion of code chips transmitted by the at least one satellite to the receiver, or a model of distortion of the phase of the signal transmitted by the at least one satellite to the receiver.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: October 22, 2013
    Assignee: Thales
    Inventors: Thibaud Calmettes, Michel Monnerat, Damien Kubrak
  • Patent number: 8521179
    Abstract: A mobile unit's position measurement apparatus is provided. The apparatus includes an observation data selection portion that calculates a plurality of estimated error values that correspond respectively to the plurality of pieces of observation data obtained by observing the signals received by the reception portion, that generates groups each of which includes estimated error values corresponding to at least a predetermined number of satellites, and then extracts, from the estimated error value groups generated, in which a difference between a maximum value and a minimum value of the estimated error values included is less than a predetermined value, and that consequently selects pieces of observation data provided by the signals from the satellites that correspond to the estimated error values that are included in an estimated error value group whose standard deviation of the estimated error values is smallest among the estimated error value groups extracted.
    Type: Grant
    Filed: November 19, 2009
    Date of Patent: August 27, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Naoto Hasegawa
  • Patent number: 8515670
    Abstract: In a method for refining a position estimate of a low earth orbiting (LEO) satellite a first position estimate of a LEO satellite is obtained with a GNSS receiver on-board the LEO satellite. The first position estimate is communicated to a Virtual Reference Station (VRS) processor. VRS corrections are received at the LEO satellite, the VRS corrections having been calculated for the first position estimate by the VRS processor. The VRS corrections are processed on-board the LEO satellite such that a VRS corrected LEO satellite position estimate of the LEO satellite is generated for the first position estimate.
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: August 20, 2013
    Assignee: Trimble Navigation Limited
    Inventors: James M. Janky, Nicholas C. Talbot, Ulrich Vollath, Bruce D. Riter
  • Publication number: 20130141278
    Abstract: A method and system for transmitting navigation data to a satellite navigation receiver for reducing time to first fix is provided. A signal generation system generates a navigation data structure comprising a first sub-frame and a second sub-frame for accommodating selective ephemeris data, a third sub-frame for accommodating first parameters of almanac data, and a fourth sub-frame for accommodating a text message comprising second parameters of almanac data, and transmits the selective ephemeris data and the first and second parameters of almanac data to the satellite navigation receiver. The configuration of the navigation data structure enables the satellite navigation receiver to collect the navigation data in reduced time.
    Type: Application
    Filed: January 20, 2012
    Publication date: June 6, 2013
    Inventor: Vyasaraj Guru Rao
  • Patent number: 8451168
    Abstract: A new method for bias estimation on multiple frequencies with a Kalman filter is proposed. It consists of four steps: First, a least-squares estimation of ranges, ionospheric delays, ambiguities, receiver phase biases and satellite phase biases is performed. The code biases are absorbed in the ranges and ionospheric delays, and a subset of ambiguities is mapped to the phase biases to remove linear dependencies between the unknown parameters. In a second step, the accuracy of the bias estimates is efficiently improved by a Kalman filter. The real-valued a posteriori ambiguity estimates are decorrelated by an integer ambiguity transformation to reduce the time of ambiguity resolution. Once the float ambiguities have sufficiently converged, they are fixed sequentially in a third step. Finally, a second Kalman filter is used to separate the receiver and satellite code biases and the tropospheric delays from the ranges.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: May 28, 2013
    Assignee: DLR Deutsches Zentrum für Luft- und Raumfahrt e.V.
    Inventors: Patrick Henkel, Zhibo Wen, Christoph Guenther