PROBLEM TO BE SOLVED: To provide a satellite positioning system that derives certainty of positioning accuracy of a positioning computation result based on a navigation signal.SOLUTION: A satellite positioning system includes: a plurality of navigation satellites that broadcasts a GNSS-purpose navigation signal; and a positioning terminal that conducts positioning. The positioning terminal is configured to: continuously receive each navigation signal from each of navigation satellites; in a process of continuously executing a positioning computation based on a plurality of navigation signals, in parallel with positioning computation processing for obtaining a positioning computation result, perform calculation processing of a standard deviation value of continuity of clock offset values obtained in the positioning computation process from the plurality of navigation signals, and an amount of change in a time error difference in real time; determine two positioning accuracy indexes of the calculated positioning computation result in real time on the basis of each of the calculated standard deviation value and the amount of change in the time error difference; associate the determined two positioning accuracy indexes with the calculated positioning computation result in real time; and output a positioning computation result associated with at least two positioning accuracy indexes in real time.SELECTED DRAWING: Figure 1
【課題】航法信号に基づく測位演算結果について、その測位精度の確からしさを導出する衛星測位システムを提供する。【解決手段】GNSS用の航法信号を放送する複数のナビゲーション衛星と、測位を行う測位端末とを含み、測位端末は、各々のナビゲーション衛星から各々の航法信号を継続的に受信し、複数の航法信号に基づく測位演算を継続的に実施する過程で、測位演算結果を得る測位演算処理と並列的に、複数の航法信号から測位演算過程で求めたクロックオフセット値の連続性の標準偏差値と時刻誤差差の変化量をリアルタイムに算出処理し、算出した標準偏差値と時刻誤差差の変化量に各々基づいて、算定した測位演算結果の2つの測位精度指標をリアルタイムに決定し、決定した2つの測位精度指標を算定した測位演算結果にリアルタイムに対応付け、少なくとも2つの測位精度指標が対応付いた測位演算結果をリアルタイムに出力する。【選択図】図1
SATELLITE POSITIONING SYSTEM, POSITIONING TERMINAL, POSITIONING METHOD AND PROGRAM
衛星測位システム、測位端末、測位方法、及びプログラム
2017-09-28
Patent
Elektronische Ressource
Japanisch
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