Explorer 4 spacecraft
E1081748
UNEXPLORED
Explorer 4 was a 1958 NASA satellite that conducted pioneering studies of Earth’s radiation environment, including detailed measurements of the Van Allen belts.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Explorer 4 | 1 |
| Explorer 4 spacecraft canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T14149593 — 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: Explorer 4 spacecraft Context triple: [Earth’s outer radiation belt, isDetectedBy, Explorer 4 spacecraft]
-
A.
Explorer 12
Explorer 12 was an early 1961 NASA scientific satellite that studied Earth’s radiation belts and interplanetary space as part of the Explorer program.
-
B.
Explorer 6
Explorer 6 was an early NASA Earth-orbiting satellite launched in 1959 that returned some of the first images of Earth from space and studied the planet’s radiation environment.
-
C.
Explorer 10
Explorer 10 was an early NASA scientific satellite launched in 1961 to study Earth’s magnetic field and the solar wind in near-Earth space.
-
D.
Magellan spacecraft
The Magellan spacecraft was a NASA robotic probe launched in 1989 that used radar mapping to produce the first detailed global images of the surface of Venus.
-
E.
Ulysses spacecraft
The Ulysses spacecraft was a joint ESA–NASA mission launched in 1990 to study the Sun’s polar regions and the heliosphere from a unique high-inclination orbit.
- 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: Explorer 4 spacecraft Target entity description: Explorer 4 was a 1958 NASA satellite that conducted pioneering studies of Earth’s radiation environment, including detailed measurements of the Van Allen belts.
-
A.
Explorer 12
Explorer 12 was an early 1961 NASA scientific satellite that studied Earth’s radiation belts and interplanetary space as part of the Explorer program.
-
B.
Explorer 6
Explorer 6 was an early NASA Earth-orbiting satellite launched in 1959 that returned some of the first images of Earth from space and studied the planet’s radiation environment.
-
C.
Explorer 10
Explorer 10 was an early NASA scientific satellite launched in 1961 to study Earth’s magnetic field and the solar wind in near-Earth space.
-
D.
Magellan spacecraft
The Magellan spacecraft was a NASA robotic probe launched in 1989 that used radar mapping to produce the first detailed global images of the surface of Venus.
-
E.
Ulysses spacecraft
The Ulysses spacecraft was a joint ESA–NASA mission launched in 1990 to study the Sun’s polar regions and the heliosphere from a unique high-inclination orbit.
- F. None of above. chosen
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Explorer 3
this entity surface form:
Explorer 4