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公开(公告)号：US20200088888A1
公开(公告)日：2020-03-19
申请号：US16687544
申请日：2019-11-18
Applicant: Deere & Company
Inventor： Yiqun Chen , Liwen L. Dai
Abstract: A moveable object determines a preliminary position for the moveable object using received satellite navigation signals and satellite orbit correction information and satellite clock correction information. A position correction is determined by identifying which cell, of a predefined set of geographical cells, corresponds to the determined preliminary position, and obtaining from a database, pre-computed tectonic terrestrial plate position information for the identified cell. Based on the information for the identified cell, a tectonic terrestrial plate, corresponding to the determined preliminary position of the moveable object is identified. Based on the identified tectonic terrestrial plate, a position correction is determined, the position correction corresponding to the identified tectonic terrestrial plate and a reference epoch, and a corrected position of the moveable object is generated in accordance with the determined preliminary position of the moveable object and the determined position correction.
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公开(公告)号：US10564293B2
公开(公告)日：2020-02-18
申请号：US15448466
申请日：2017-03-02
Applicant: Deere & Company
Inventor： Yujie Zhang , Liwen L. Dai , Yiqun Chen
Abstract: A satellite corrections generation system receives reference receiver measurement information from a plurality of reference receivers at established locations. In accordance with the received reference receiver measurement information, and established locations of the reference receivers, the system determines narrow-lane navigation solutions for the plurality of reference receivers. The system also determines clusters of single-difference (SD) narrow-lane floating ambiguities, each cluster comprising pairs of SD narrow-lane floating ambiguities for respective pairs of satellites. A satellite narrow-lane bias value for each satellite of a plurality of satellites is initially determined in accordance with fractional portions of the SD narrow-lane floating ambiguities in the clusters, and then periodically updated by a Kalman filter. A set of navigation satellite corrections for each satellite, including the satellite narrow-lane bias value for each satellite, is generated and transmitted to navigation receivers for use in determining locations of the navigation receivers.
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3.发明申请公开(公告)号：US20170269225A1
公开(公告)日：2017-09-21
申请号：US15448474
申请日：2017-03-02
Applicant: Deere & Company
Inventor： Liwen L. Dai , Yiqun Chen , Yujie Zhang
Abstract: A satellite corrections generation system receives reference receiver measurement information from a plurality of reference receivers at established locations. In accordance with the received reference receiver measurement information, and established locations of the reference receivers, the system determines wide-lane navigation solutions for the plurality of reference receivers. The system also determines clusters of single-difference (SD) wide-lane floating ambiguities. A satellite wide-lane bias value for each satellite of a plurality of satellites is initially determined in accordance with fractional portions of the SD wide-lane floating ambiguities in the clusters and over-range adjustment criteria. A set of navigation satellite corrections for each satellite, including the satellite wide-lane bias value for each satellite, is generated and transmitted to navigation receivers for use in determining locations of the navigation receivers.
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4.发明申请公开(公告)号：US20170269224A1
公开(公告)日：2017-09-21
申请号：US15448466
申请日：2017-03-02
Applicant: Deere & Company
Inventor： Yujie Zhang , Liwen L. Dai , Yiqun Chen
Abstract: A satellite corrections generation system receives reference receiver measurement information from a plurality of reference receivers at established locations. In accordance with the received reference receiver measurement information, and established locations of the reference receivers, the system determines narrow-lane navigation solutions for the plurality of reference receivers. The system also determines clusters of single-difference (SD) narrow-lane floating ambiguities, each cluster comprising pairs of SD narrow-lane floating ambiguities for respective pairs of satellites. A satellite narrow-lane bias value for each satellite of a plurality of satellites is initially determined in accordance with fractional portions of the SD narrow-lane floating ambiguities in the clusters, and then periodically updated by a Kalman filter. A set of navigation satellite corrections for each satellite, including the satellite narrow-lane bias value for each satellite, is generated and transmitted to navigation receivers for use in determining locations of the navigation receivers.
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5.发明授权公开(公告)号：US10564294B2
公开(公告)日：2020-02-18
申请号：US15448474
申请日：2017-03-02
Applicant: Deere & Company
Inventor： Liwen L. Dai , Yiqun Chen , Yujie Zhang
Abstract: A satellite corrections generation system receives reference receiver measurement information from a plurality of reference receivers at established locations. In accordance with the received reference receiver measurement information, and established locations of the reference receivers, the system determines wide-lane navigation solutions for the plurality of reference receivers. The system also determines clusters of single-difference (SD) wide-lane floating ambiguities. A satellite wide-lane bias value for each satellite of a plurality of satellites is initially determined in accordance with fractional portions of the SD wide-lane floating ambiguities in the clusters and over-range adjustment criteria. A set of navigation satellite corrections for each satellite, including the satellite wide-lane bias value for each satellite, is generated and transmitted to navigation receivers for use in determining locations of the navigation receivers.
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Patent Agency Ranking
公开(公告)号：US10386496B2
公开(公告)日：2019-08-20
申请号：US15448481
申请日：2017-03-02
Applicant: Deere & Company
Inventor： Liwen L. Dai , Sonia Kuntz , Yiqun Chen , Yujie Zhang
Abstract: A satellite corrections generation system receives reference receiver measurement information from a plurality of reference receivers at established locations. In accordance with the received reference receiver measurement information, and established locations of the reference receivers, the system determines narrow-lane navigation solutions for the plurality of reference receivers. The system also determines, in accordance with the narrow-lane navigation solutions, at a first update rate, an orbit correction for each satellite of a plurality of satellites; at a second update rate, a clock correction for each such satellite; and at a third update rate that is faster than the second update rate, an update to the clock correction for each such satellite. Further, the system generates navigation satellite corrections for each such satellite, including the orbit correction updated at the first update rate, and the clock correction that is updated at the third update rate.
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公开(公告)号：US10338232B2
公开(公告)日：2019-07-02
申请号：US15448457
申请日：2017-03-02
Applicant: Deere & Company
Inventor： Yujie Zhang , Liwen L. Dai , Yiqun Chen
Abstract: A satellite corrections generation system receives reference receiver measurement information from a plurality of reference receivers at established locations. In accordance with the received reference receiver measurement information, and established locations of the reference receivers, the system determines wide-lane navigation solutions for the plurality of reference receivers. The system also determines clusters of single-difference (SD) wide-lane ambiguity values, each cluster comprising pairs of SD wide-lane floating ambiguities for respective pairs of satellites. A satellite wide-lane bias value for each satellite of a plurality of satellites is initially determined in accordance with fractional portions of the SD wide-lane floating ambiguities in the clusters, and then periodically updated by applying SD wide-lane integer constraints in a Kalman filter. A set of navigation satellite corrections for each satellite, including the satellite wide-lane bias value for each satellite, is generated and transmitted to navigation receivers for use in determining locations of the navigation receivers.
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公开(公告)号：US20170212247A1
公开(公告)日：2017-07-27
申请号：US15285409
申请日：2016-10-04
Applicant: Deere & Company
Inventor： Yiqun Chen , Liwen L. Dai
Abstract: A moveable object determines a preliminary position for the moveable object using received satellite navigation signals and satellite orbit correction information and satellite clock correction information. A position correction is determined by identifying which cell, of a predefined set of geographical cells, corresponds to the determined preliminary position, and obtaining from a database, pre-computed tectonic terrestrial plate position information for the identified cell. Based on the information for the identified cell, a tectonic terrestrial plate, corresponding to the determined preliminary position of the moveable object is identified. Based on the identified tectonic terrestrial plate, a position correction is determined, the position correction corresponding to the identified tectonic terrestrial plate and a reference epoch, and a corrected position of the moveable object is generated in accordance with the determined preliminary position of the moveable object and the determined position correction.
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公开(公告)号：US10802159B2
公开(公告)日：2020-10-13
申请号：US16687544
申请日：2019-11-18
Applicant: Deere & Company
Inventor： Yiqun Chen , Liwen L. Dai
Abstract: A moveable object determines a preliminary position for the moveable object using received satellite navigation signals and satellite orbit correction information and satellite clock correction information. A position correction is determined by identifying which cell, of a predefined set of geographical cells, corresponds to the determined preliminary position, and obtaining from a database, pre-computed tectonic terrestrial plate position information for the identified cell. Based on the information for the identified cell, a tectonic terrestrial plate, corresponding to the determined preliminary position of the moveable object is identified. Based on the identified tectonic terrestrial plate, a position correction is determined, the position correction corresponding to the identified tectonic terrestrial plate and a reference epoch, and a corrected position of the moveable object is generated in accordance with the determined preliminary position of the moveable object and the determined position correction.
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公开(公告)号：US10191157B2
公开(公告)日：2019-01-29
申请号：US15257092
申请日：2016-09-06
Applicant: Deere & Company
Inventor： Liwen L. Dai , Sonia U. Kuntz , Yujie Zhang , Yiqun Chen
Abstract: A wide-lane ambiguity and a respective satellite wide-lane bias are determined for the collected phase measurements for each satellite for assistance in narrow-lane ambiguity resolution. Satellite correction data is determined for each satellite in an orbit solution based on the collected raw phase and code measurements and determined orbital narrow-lane ambiguity and respective orbital satellite narrow-lane bias. A slow satellite clock correction is determined based on the satellite orbital correction data, the collected raw phase and code measurements, and clock narrow-lane ambiguity and respective satellite narrow-lane bias. A low latency clock module or data processor determines lower-latency satellite clock correction data or delta clock adjustment to the slow satellite clock based on freshly or recently updated measurements of the collected raw phase measurements that are more current than a plurality of previous measurements of the collected raw phase measurements used for the slow satellite clock correction to provide lower-latency clock correction data.
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