地上型衛星航法補強システム、及び、可用性予測方法

Japanese Patent JP6741005

B2

In order to improve the availability of a ground type satellite navigation reinforcement system, the present invention is provided with: a worst case ionospheric delay amount difference calculation unit which calculates a worst case ionospheric delay amount difference table for a ground system and an onboard system; a differential correction value calculation unit which creates usable satellite information; a geometric screening unit which guarantees that an error experienced by the onboard system will not exceed a protection level, regardless of which satellite set of positioning satellites is used by the onboard system; an availability prediction unit which creates availability loss information if the protection level when all usable satellites are used exceeds an alert limit; and an eliminated satellite determination unit which eliminates a prescribed number of positioning satellites from the positioning satellites included in the usable satellite information to calculate an eliminated satellite indicator, excludes from the positioning satellites included in the usable satellite information the positioning satellite which was eliminated when the eliminated satellite indicator was minimized, and using the result therefrom as usable satellite update information, causes the geometric screening unit to calculate an integrity parameter.

Suzuki Kazufumi

JP2017526182A

August 19, 2020

June 29, 2016

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NEC

G01S19/15; G01C21/20; G01S19/07; G01S19/28; G01S19/43

JP2014182150A

US20150145722
US20040088111

吉原貴之,齋藤亨,藤井直樹,工藤正博,福島荘之介,齊藤真二,日本におけるGBASの電離層モニタ方式に関する検討,電子航法研究所研究発表会講演概要,日本,国立研究開発法人 海上・港湾・航空技術研究所 電子,2009年 6月11日,Vol.9th,ISSN 1344-1191,p.83-86

Masahiko Desk
Naoki Shimosaka

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