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1. WO2020139578 - ERROR CORRECTION IN GPS SIGNAL

Publication Number WO/2020/139578
Publication Date 02.07.2020
International Application No. PCT/US2019/066085
International Filing Date 12.12.2019
IPC
G01S 19/23 2010.01
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
19Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
01Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS , GLONASS or GALILEO
13Receivers
23Testing, monitoring, correcting or calibrating of a receiver element
CPC
G01S 19/072
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
19Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
01Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
03Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
07providing data for correcting measured positioning data, e.g. DGPS [differential GPS] or ionosphere corrections
072Ionosphere corrections
G01S 19/40
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
19Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
38Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
39the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
40Correcting position, velocity or attitude
G01S 19/43
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
19Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
38Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
39the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
42Determining position
43using carrier phase measurements, e.g. kinematic positioning; using long or short baseline interferometry
Applicants
  • ALIBABA GROUP HOLDING LIMITED
Inventors
  • LIN, Ming
  • SONG, Xiaomin
  • QIAN, Qi
  • SUN, Liang
  • ZHU, Shenghuo
  • JIN, Rong
Agents
  • NELSON, Brett, L.
Priority Data
16/235,48728.12.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ERROR CORRECTION IN GPS SIGNAL
(FR) CORRECTION D'ERREUR DANS UN SIGNAL GPS
Abstract
(EN)
Methods and systems for correcting an error of a GPS signal are provided. The method includes receiving a request for positioning service from a computing device at a location; estimating a Total Electron Content (vTEC) value associated with the location of the object based at least in part on a plurality of vTEC values of a plurality of ground stations equipped with a plurality of GPS receivers, the vTEC value being estimated based on an estimator that is trained using a filter-reweight-retrain robust algorithm; and sending information of the estimated vTEC value to the computing device to allow the computing device to correct an error of a GPS signal received by the computing device, the error of the GPS signal being associated with an ionospheric delay.
(FR)
L'invention concerne des procédés et des systèmes de correction d'une erreur d'un signal GPS. Le procédé consiste à : recevoir une demande de service de positionnement provenant d'un dispositif informatique au niveau d'un emplacement ; estimer une valeur de teneur totale en électrons (vTEC) associée à l'emplacement de l'objet, au moins en partie sur la base d'une pluralité de valeurs vTEC d'une pluralité de stations au sol équipées d'une pluralité de récepteurs GPS, la valeur vTEC étant estimée sur la base d'un estimateur qui est entraîné à l'aide d'un algorithme robuste de filtrage-repondération-réentraînement ; et envoyer au dispositif informatique des informations relatives à la valeur vTEC estimée pour permettre audit dispositif de corriger une erreur d'un signal GPS reçu par celui-ci, l'erreur du signal GPS étant associée à un retard ionosphérique.
Also published as
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