-
公开(公告)号：US20230062246A1
公开(公告)日：2023-03-02
申请号：US17411705
申请日：2021-08-25
发明人： Min WANG
摘要： Described are methods, systems, and devices for determining position using Differential Global Navigation Satellite (DGNSS) measurements. Techniques described herein involve taking carrier phase measurements at a reference station or other GNSS receiver at a known location, and combining the carrier phase measurements with pseudorange measurements taken at the reference station to resolve carrier phase ambiguity and to, in combination with pseudorange measurements taken at a mobile device, obtain a differentially corrected measurement that can be used to estimate a position of the mobile device. The differentially corrected measurement can be a double differential measurement based on signals from a pair of GNSS satellites.
-
公开(公告)号：US11578979B2
公开(公告)日：2023-02-14
申请号：US16994209
申请日：2020-08-14
申请人： Raytheon Company
发明人： Shuwu Wu , Fang Sheng
摘要： FAST provides a method of “bootstrapping” a pseudo-range (PR) stage and one or more carrier-phase (CP) stages to quickly produce a highly accurate, high integrity receiver-to-receiver lever arm survey based on differential GNSS processing. The lever arm estimates of a previous stage are used to resolve the carrier phase ambiguities of the next stage. The method can be integrated with the warm-up of the integrity monitors to reduce the entire survey and warm-up startup time to 90 minutes or less, which is critical for mobile and make shift and precision approach and (automated) landing operations.
-
公开(公告)号：US11480690B2
公开(公告)日：2022-10-25
申请号：US17343327
申请日：2021-06-09
发明人： Paul Grgich , Lloyd Maza , Philippe Brocard
摘要： A method and system for determining a receiver position comprising receiving satellite observations from a set of satellites, determining differenced observations based on the satellite observations, determining an all-in-view position of the receiver based on the differenced observations, determining a set of fault modes each associated with a subset of the differenced observations, for a fault mode of the set of fault modes, determining a fault-tolerant position of the receiver using the subset of differenced observations associated with the fault mode, when the all-in-view position and the fault tolerant position of the receiver for each fault mode are within a solution separation threshold, calculating a protection level associated with the all-in-view position of the receiver.
-
公开(公告)号：US11428821B2
公开(公告)日：2022-08-30
申请号：US16604198
申请日：2018-03-01
申请人： Robert Bosch GmbH
发明人： Jens Strobel , Markus Langer
摘要： A method for monitoring an integrity of reference stations, having known and fixed coordinates, of a correction service system for a satellite-supported navigation system. A first group of the reference stations is operated to receive satellite signals of a plurality of satellites of the satellite-supported navigation system. It is provided that a) a first reference station is selected from the first group, and b) at least one first correction value is ascertained as a function of the satellite signals respectively received by the remaining reference stations of the first group, and c) the monitoring of the integrity is carried out in that first coordinates of the first reference station, determined using the satellite signals received by the first reference station and using the at least one first correction value, are compared with the known coordinates of the first reference station and checked for at least one first deviation.
-
公开(公告)号：US11415708B2
公开(公告)日：2022-08-16
申请号：US16957716
申请日：2018-12-21
摘要： A positioning device includes a first GNSS receiver; a communication link configured to receive a spatial position, code measurements and carrier phase measurements of a second GNSS receiver; an input interface to a processing logic, the processing logic being configured to: calculate a position of the first positioning device from communicated data; and to estimate one or more parameters representative of multipath at the position of the first positioning device; wherein the communication link is configured to communicate to a second positioning device the parameters representative of multipath at the position of the first positioning device. Described developments comprise the use of multipath severity indicators, the determination of relative distances between receivers, validity conditions in time and/or space of multipath, various embodiments in a train or in a group of vehicles. Software aspects are discussed.
-
公开(公告)号：US11300685B2
公开(公告)日：2022-04-12
申请号：US16400775
申请日：2019-05-01
发明人： Thomas Konschak , Josef Krammer
摘要： To provide correction data for determining position, first position data are determined and/or made available to a vehicle depending on an incoming Global Navigation Satellite System (GNSS) signal, the vehicle having a GNSS receiver or a differential GNSS (DGNSS) receiver for receiving the incoming GNSS signal, and the first position data being determined when the vehicle is in a charging position at a predefined charging station. Second position data are also determined and/or made available, the second position data including information which is representative of a global position of the predefined charging station. Correction data is determined depending on the first position data and the second position data. The correction data is made available to at least one further device to determine the position of the at least one further device.
-
公开(公告)号：US20220082704A1
公开(公告)日：2022-03-17
申请号：US17022412
申请日：2020-09-16
摘要： Techniques for detecting GNSS spoofing using inertial mixing data are disclosed. One or more navigation parameters are determined by at least one GNSS receiver and a plurality of IRS from at least two periods of time. The navigation parameters from the GNSS receiver(s) and the IRS are compared at each time period, and the difference(s) between the compared navigation parameters are further compared to generate at least one differential value. A system can detect GNSS spoofing by comparing the at least one differential value to a suitable threshold. In one aspect each IRS navigation parameter is compared with a corresponding GNSS navigation parameter, wherein the plurality of differential values is mixed before threshold comparison. In another aspect, each IRS navigation parameter is mixed before comparison with a GNSS navigation parameter, and the resulting differential value is then compared against a threshold.
-
公开(公告)号：US20220075082A1
公开(公告)日：2022-03-10
申请号：US17244418
申请日：2021-04-29
发明人： Zdenek Kana , Radek Baranek , Jindrich Dunik , Jussi Raasakka , Milos Sotak
摘要： Systems and methods for estimating attitude and heading are provided. The systems and methods utilize carrier phase single difference (CSD) measurements or carrier phase double difference (CDD) measurements and a validation test for CSD or CDD measurement residuals. The systems and methods include applying a wrapping function with limit of ±half of the GNSS carrier signal wavelength to CSD or CDD measurement residuals to generate refined CSD or CDD measurement residuals and validating the refined CSD or CDD measurement residuals variance to determine valid CSD or CDD measurements. By using the validated CSD and CDD measurements, the systems and methods enable low grade hybrid inertial navigation systems to estimate attitude and heading with integrity and without a magnetometer or the need for integer ambiguity resolution even during the static or steady phases of flight/operation.
-
公开(公告)号：US11181643B2
公开(公告)日：2021-11-23
申请号：US16398839
申请日：2019-04-30
摘要： A microservice node can receive a request for information identifying a corrected physical location of a client device. The request can include raw satellite data associated with the client device. The microservice node can convert the raw satellite data to a Radio Technical Commission for Maritime Services (RTCM) format. The microservice node can determine, based on converting the raw satellite data to the RTCM format, an estimated physical location of the client device. The microservice node can receive, based on transmitting a request to a network real-time kinematics (RTK) device, corrections data associated with the estimated physical location of the client device. The microservice node can determine, using a cloud RTK engine, the corrected physical location of the client device based on the estimated physical location and corrections data. The microservice node can transmit, to the client device, the information identifying the corrected physical location of the client device.
-
公开(公告)号：US20210293977A1
公开(公告)日：2021-09-23
申请号：US17202336
申请日：2021-03-15
发明人： Guoxiu PAN
摘要： A method for tracking a target object using a tracking device includes obtaining an estimated location of a target object and a correction measurement, determining, according to the estimated location of the target object and the correction measurement, a corrected location of the target object and a corrected location of the tracking device, determining, based on the corrected location of the target object and the corrected location of the tracking device, a position of the tracking device relative to the target object, and adjusting, according to a predetermined distance between the tracking device and the target object, the position of the tracking device relative to the target object such that the position of the tracking device relative to the target object satisfies the predetermined distance.
-
-
-
-
-
-
-
-
-
搜索结果
536 条记录 (耗时 0.035 秒)