QZSS Michibiki navigation satellites

E410447

regional satellite navigation system satellite constellation

The QZSS Michibiki navigation satellites are Japan’s regional satellite navigation system designed to enhance GPS accuracy and reliability over the Asia-Oceania region, particularly Japan.

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All labels observed (4)

Label	Occurrences
QZSS	7
Michibiki system	1
QZSS Michibiki navigation satellites canonical	1
Quasi-Zenith Satellite System	1

How this entity was disambiguated

This entity first appeared as the object of triple T4065576 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: QZSS Michibiki navigation satellites
Context triple: [H-IIA launch vehicle, launchesNotablePayload, QZSS Michibiki navigation satellites]

A. NavIC satellites
NavIC satellites are a constellation of Indian regional navigation spacecraft that provide accurate position, navigation, and timing services over India and surrounding areas.
B. Galileo satellite navigation system
The Galileo satellite navigation system is the European Union’s global navigation satellite system designed to provide highly accurate positioning and timing services worldwide as an independent alternative to GPS and other GNSS constellations.
C. BeiDou
BeiDou is China's satellite-based global navigation system that serves as an alternative to and competitor of GPS.
D. Iridium satellite system
The Iridium satellite system is a global network of low Earth orbit communication satellites that provides worldwide voice and data coverage, including for remote sensing platforms like Argo floats.
E. Himawari meteorological satellites
The Himawari meteorological satellites are a series of Japanese geostationary weather satellites that provide continuous, high-resolution monitoring of weather and environmental conditions over the Asia-Pacific region.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: QZSS Michibiki navigation satellites
Target entity description: The QZSS Michibiki navigation satellites are Japan’s regional satellite navigation system designed to enhance GPS accuracy and reliability over the Asia-Oceania region, particularly Japan.

A. NavIC satellites
NavIC satellites are a constellation of Indian regional navigation spacecraft that provide accurate position, navigation, and timing services over India and surrounding areas.
B. Galileo satellite navigation system
The Galileo satellite navigation system is the European Union’s global navigation satellite system designed to provide highly accurate positioning and timing services worldwide as an independent alternative to GPS and other GNSS constellations.
C. BeiDou
BeiDou is China's satellite-based global navigation system that serves as an alternative to and competitor of GPS.
D. Iridium satellite system
The Iridium satellite system is a global network of low Earth orbit communication satellites that provides worldwide voice and data coverage, including for remote sensing platforms like Argo floats.
E. Himawari meteorological satellites
The Himawari meteorological satellites are a series of Japanese geostationary weather satellites that provide continuous, high-resolution monitoring of weather and environmental conditions over the Asia-Pacific region.
F. None of above. chosen

Statements (50)

Predicate	Object
instanceOf	regional satellite navigation system ⓘ satellite constellation ⓘ
alsoKnownAs	QZSS Michibiki navigation satellites ⓘ surface form: Michibiki system QZSS Michibiki navigation satellites ⓘ surface form: Quasi-Zenith Satellite System
applicationDomain	autonomous driving ⓘ aviation navigation ⓘ disaster management ⓘ precision agriculture ⓘ surveying ⓘ
augmentationServiceName	MADOCA ⓘ SLAS ⓘ
augmentationSystemType	SBAS-like ⓘ
country	Japan ⓘ
coverageFocus	high elevation over Japan ⓘ
designedFor	mountainous terrain ⓘ urban canyon environments ⓘ
designedToEnhance	GPS accuracy ⓘ GPS reliability ⓘ
developedBy	Japan ⓘ
firstLaunchDate	2010-09-11 ⓘ
firstLaunchVehicle	H-IIA launch vehicle ⓘ surface form: H-IIA
firstSatelliteName	Michibiki-1 ⓘ
interoperableWith	BeiDou ⓘ GLONASS ⓘ GPS ⓘ Galileo ⓘ
L6SignalUse	centimeter-level augmentation ⓘ sub-meter augmentation ⓘ
launchSite	Tanegashima Space Center ⓘ
nominalConstellationSize	4 satellites ⓘ
operator	Cabinet Office of Japan ⓘ Japan Aerospace Exploration Agency ⓘ
orbitType	geosynchronous orbit ⓘ quasi-zenith orbit ⓘ
plannedConstellationExpansion	7 satellites ⓘ
primaryPurpose	augmentation of GPS ⓘ satellite navigation ⓘ
providesSignal	L1 C/A ⓘ L1C ⓘ L2C ⓘ L5 ⓘ L6 ⓘ
regionServed	Asia-Pacific ⓘ surface form: Asia-Oceania Japan ⓘ
serviceType	augmentation ⓘ messaging ⓘ navigation ⓘ
shortName	QZSS Michibiki navigation satellites self-linksurface differs ⓘ surface form: QZSS
status	operational ⓘ
timeStandard	Japan Standard Time referenced system time ⓘ

How these facts were elicited