Medium Earth orbit
E1030560
Medium Earth orbit is a region of space around Earth located between low Earth orbit and geostationary orbit, commonly used for navigation satellite constellations like GPS.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Medium Earth orbit canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T13256751 — 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: Medium Earth orbit Context triple: [LEO, isBelow, Medium Earth orbit]
-
A.
low Earth orbit
Low Earth orbit is the region of space relatively close to Earth’s surface, commonly used for satellites, space stations, and crewed missions due to its lower altitude and easier access.
-
B.
Molniya orbit
A Molniya orbit is a highly elliptical, high-inclination Earth orbit designed to provide long-duration coverage over high latitudes, particularly useful for communications and observation of polar regions.
-
C.
Clarke orbit
A Clarke orbit is a geostationary orbit directly above Earth's equator where a satellite appears fixed over one point on the surface, enabling continuous communication coverage.
-
D.
Sun-synchronous orbit
A Sun-synchronous orbit is a near-polar, low Earth orbit in which a satellite passes over any given point of the planet’s surface at the same local solar time, providing consistent lighting conditions for imaging and observation.
-
E.
Earth orbit
Earth orbit is the gravitationally bound path around our planet followed by natural and artificial objects such as satellites and space stations.
- 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: Medium Earth orbit Target entity description: Medium Earth orbit is a region of space around Earth located between low Earth orbit and geostationary orbit, commonly used for navigation satellite constellations like GPS.
-
A.
low Earth orbit
Low Earth orbit is the region of space relatively close to Earth’s surface, commonly used for satellites, space stations, and crewed missions due to its lower altitude and easier access.
-
B.
Molniya orbit
A Molniya orbit is a highly elliptical, high-inclination Earth orbit designed to provide long-duration coverage over high latitudes, particularly useful for communications and observation of polar regions.
-
C.
Clarke orbit
A Clarke orbit is a geostationary orbit directly above Earth's equator where a satellite appears fixed over one point on the surface, enabling continuous communication coverage.
-
D.
Sun-synchronous orbit
A Sun-synchronous orbit is a near-polar, low Earth orbit in which a satellite passes over any given point of the planet’s surface at the same local solar time, providing consistent lighting conditions for imaging and observation.
-
E.
Earth orbit
Earth orbit is the gravitationally bound path around our planet followed by natural and artificial objects such as satellites and space stations.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
Earth orbit regime
ⓘ
orbital region ⓘ satellite orbit ⓘ |
| advantage |
good geometry for global navigation coverage
ⓘ
shorter signal path and latency than geostationary orbit ⓘ wider Earth surface coverage per satellite than low Earth orbit ⓘ |
| alsoKnownAs |
MEO
NERFINISHED
ⓘ
intermediate circular orbit ⓘ |
| altitudeRangeDescription | between low Earth orbit and geostationary orbit altitudes ⓘ |
| challenge |
high radiation levels for spacecraft electronics
ⓘ
longer signal travel time than low Earth orbit ⓘ |
| comparedToGeostationaryOrbit | lower altitude and shorter orbital period ⓘ |
| comparedToLowEarthOrbit | higher altitude and longer orbital period ⓘ |
| governedBy |
Earth’s gravitational field
ⓘ
orbital mechanics ⓘ |
| gravitationalInfluence | dominated by Earth gravity ⓘ |
| hasUser |
China
NERFINISHED
ⓘ
European Union NERFINISHED ⓘ India NERFINISHED ⓘ Russia NERFINISHED ⓘ United States NERFINISHED ⓘ |
| hostsConstellation |
BeiDou (MEO component)
NERFINISHED
ⓘ
GLONASS NERFINISHED ⓘ GPS NERFINISHED ⓘ Galileo NERFINISHED ⓘ |
| locatedBetween |
geostationary orbit
ⓘ
low Earth orbit ⓘ |
| orbitalPeriodRange_hours | approximately 2 to 24 ⓘ |
| orbitalShape | mostly circular for navigation constellations ⓘ |
| orbits | Earth NERFINISHED ⓘ |
| partOf | Earth-centered orbital classification ⓘ |
| passesThrough |
inner Van Allen belt (for some inclinations)
ⓘ
outer Van Allen belt (for some altitudes) ⓘ |
| radiationEnvironment | includes Van Allen radiation belts ⓘ |
| requires |
precise orbit determination
ⓘ
radiation-hardened spacecraft design ⓘ |
| subjectTo |
space debris concerns
ⓘ
space weather effects ⓘ |
| typicalAltitudeLowerBound_km | 2000 GENERATED ⓘ |
| typicalAltitudeUpperBound_km | 35786 GENERATED ⓘ |
| typicalInclination |
55 degrees (GPS)
ⓘ
56 degrees (Galileo) ⓘ 64.8 degrees (GLONASS) ⓘ |
| typicalNavigationOrbitAltitude_km | about 20000 GENERATED ⓘ |
| typicalNavigationOrbitPeriod_hours | about 12 GENERATED ⓘ |
| usedFor |
Earth observation (specialized missions)
ⓘ
communications satellites ⓘ global navigation satellite systems ⓘ navigation satellite constellations ⓘ space environment research ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Medium Earth orbit Description of subject: Medium Earth orbit is a region of space around Earth located between low Earth orbit and geostationary orbit, commonly used for navigation satellite constellations like GPS.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.