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Rapid recovery of precise position after temporary signal loss

A fast recovery, satellite signal technology, used in satellite radio beacon positioning systems, measurement devices, instruments, etc., to solve problems such as inaccuracy and wasted downtime

Active Publication Date: 2019-01-04
DEERE & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some prior art attempts to use the last available position estimate prior to loss of lock, the assumption that the last available position estimate did not change substantially prior to the outage period may be inaccurate
As a result, operators of heavy equipment, agricultural equipment, construction equipment, forestry equipment, or other work vehicles may have significantly wasted downtime waiting for the signal to converge, rather than performing work tasks with the work vehicle

Method used

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  • Rapid recovery of precise position after temporary signal loss
  • Rapid recovery of precise position after temporary signal loss
  • Rapid recovery of precise position after temporary signal loss

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Embodiment Construction

[0016] Position-determining receivers, position-determining receivers, or satellite receivers, such as Global Navigation Satellite System (GNSS) receivers, are capable of receiving signals subject to ambiguity (e.g., an entire ambiguity) affects the carrier phase measurements. An epoch or measurement time means a time interval (eg, at some corresponding frequency or rate) at which the carrier phase is measured by a mobile receiver at a particular instant in time in the navigation satellite system. As used herein, mobile receiver is synonymous with the term rover or rover. The receiver determines or resolves the ambiguity of the carrier phase measurements to accurately estimate the precise location or coordinates of the receiver. Although code phase measurements or pseudorange measurements by GNSS receivers are independent of the integer ambiguity in the cycle of the receiving satellite, code phase measurements do not provide the centimeter-level position accuracy required for...

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Abstract

A real-time kinematic (RTK) filter (48) uses the backup data to estimate a relative position vector between the mobile receiver (20) at the first measurement time and the mobile receiver (20) at the second measurement time and to provide recovery data associated with a satellite-differenced double-difference estimation for the mobile receiver (20) between the first measurement time and the secondmeasurement time. A navigation positioning estimator (50) can apply the relative position vector, the backup data, the recovery data from the RTK filter (48), and received correction data with preciseclock and orbit information on the satellite signals, as inputs, constraints, or both for convergence or resolution of wide-lane and narrow-lane ambiguities, and determination of a precise position,in accordance with a precise positioning algorithm.

Description

[0001] Related applications [0002] This article, including the drawings, claims the benefit of priority and filing date based on US Provisional Application No. 62 / 310,062, filed March 18, 2016, under 35 U.S.C. §119(e), wherein the The provisional application is hereby incorporated by reference. technical field [0003] The present disclosure relates to a method and satellite receiver system for rapidly recovering a precise position after a temporary signal loss of one or more satellite signals. Background technique [0004] In some prior art satellite navigation receivers, such as Global Navigation Satellite System (GNSS) receivers, can provide centimeter-level position estimates. Such satellite navigation receivers typically rely on carrier phase measurements that are affected by the integer ambiguity of the period of the received satellite signal. In some prior art, the long initialization period (also known as the post-normalization time) is typically 30 to 45 minutes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/43G01S19/01G01S19/51
CPCG01S19/04G01S19/32G01S19/44
Inventor 戴礼文王敏黄舜植
Owner DEERE & CO