Lyman Alpha Photometer
E262983
Lyman Alpha Photometer is a scientific instrument aboard India's Mars Orbiter Mission designed to study the Martian upper atmosphere by measuring hydrogen and deuterium emissions in the Lyman-alpha spectral line.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Lyman Alpha Photometer canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T2402179 — 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: Lyman Alpha Photometer Context triple: [Mars Orbiter Mission, hasInstrument, Lyman Alpha Photometer]
-
A.
Goddard High Resolution Spectrograph
The Goddard High Resolution Spectrograph was a highly sensitive ultraviolet spectrograph aboard the Hubble Space Telescope used to study the composition, temperature, and motion of astronomical objects.
-
B.
Faint Object Spectrograph
The Faint Object Spectrograph was an early-generation Hubble Space Telescope instrument designed to obtain detailed spectra of very dim astronomical objects across a wide range of wavelengths.
-
C.
Faint Object Camera
The Faint Object Camera was a high-resolution imaging instrument on the Hubble Space Telescope designed to observe very dim and distant astronomical objects in ultraviolet and visible light.
-
D.
Cosmic Origins Spectrograph
The Cosmic Origins Spectrograph is a highly sensitive ultraviolet spectrograph on the Hubble Space Telescope designed to study the origins and evolution of galaxies, stars, and the intergalactic medium.
-
E.
Dark Energy Camera
The Dark Energy Camera is a powerful wide-field astronomical imaging instrument designed to study dark energy and map the large-scale structure of the universe.
- 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: Lyman Alpha Photometer Target entity description: Lyman Alpha Photometer is a scientific instrument aboard India's Mars Orbiter Mission designed to study the Martian upper atmosphere by measuring hydrogen and deuterium emissions in the Lyman-alpha spectral line.
-
A.
Goddard High Resolution Spectrograph
The Goddard High Resolution Spectrograph was a highly sensitive ultraviolet spectrograph aboard the Hubble Space Telescope used to study the composition, temperature, and motion of astronomical objects.
-
B.
Faint Object Spectrograph
The Faint Object Spectrograph was an early-generation Hubble Space Telescope instrument designed to obtain detailed spectra of very dim astronomical objects across a wide range of wavelengths.
-
C.
Faint Object Camera
The Faint Object Camera was a high-resolution imaging instrument on the Hubble Space Telescope designed to observe very dim and distant astronomical objects in ultraviolet and visible light.
-
D.
Cosmic Origins Spectrograph
The Cosmic Origins Spectrograph is a highly sensitive ultraviolet spectrograph on the Hubble Space Telescope designed to study the origins and evolution of galaxies, stars, and the intergalactic medium.
-
E.
Dark Energy Camera
The Dark Energy Camera is a powerful wide-field astronomical imaging instrument designed to study dark energy and map the large-scale structure of the universe.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
Mars orbiter payload
ⓘ
scientific instrument ⓘ spaceborne ultraviolet photometer ⓘ |
| abbreviation | LAP ⓘ |
| agency |
Indian Space Research Organisation
ⓘ
surface form:
ISRO
|
| countryOfOperator | India ⓘ |
| dataType |
deuterium abundance profiles
ⓘ
hydrogen abundance profiles ⓘ ultraviolet radiance measurements ⓘ |
| enablesStudyOf |
D/H ratio in Martian upper atmosphere
ⓘ
water loss from Mars over geological time ⓘ |
| hostMission |
Mars Orbiter Mission
ⓘ
surface form:
Mangalyaan
|
| hostMissionLaunchDate | 2013-11-05 ⓘ |
| hostMissionMarsOrbitInsertionDate | 2014-09-24 ⓘ |
| hostMissionOrbitType | highly elliptical Mars orbit ⓘ |
| hostMissionType | Mars orbiter ⓘ |
| locatedOnSpacecraft |
Mars Orbiter Mission
ⓘ
surface form:
Mars Orbiter Mission spacecraft
|
| measurementTechnique | photometry ⓘ |
| measures |
Lyman-alpha brightness of deuterium
ⓘ
Lyman-alpha brightness of hydrogen ⓘ |
| missionPhase | Mars orbit ⓘ |
| missionType | planetary science ⓘ |
| observationalGeometry |
limb observations of Mars
ⓘ
nadir observations of Mars ⓘ |
| observesRegion |
Martian exosphere
ⓘ
Martian upper atmosphere ⓘ |
| operator | Indian Space Research Organisation ⓘ |
| partOf | Mars Orbiter Mission ⓘ |
| platformOrbit | areocentric orbit ⓘ |
| primaryObjective | study Martian upper atmosphere ⓘ |
| scientificDiscipline |
planetary atmospheres
ⓘ
space physics ⓘ ultraviolet astronomy ⓘ |
| scientificObjective |
measure deuterium Lyman-alpha emissions
ⓘ
measure hydrogen Lyman-alpha emissions ⓘ |
| spectralLineObserved |
Lyman series in hydrogen spectrum
ⓘ
surface form:
Lyman-alpha
|
| status | operational during early Mars Orbiter Mission phase ⓘ |
| studies |
escape of deuterium from Mars
ⓘ
escape of hydrogen from Mars ⓘ evolution of Martian atmosphere ⓘ |
| targetBody | Mars ⓘ |
| usedFor |
constraining atmospheric escape rates at Mars
ⓘ
constraining history of Martian water inventory ⓘ |
| wavelengthRegion | ultraviolet ⓘ |
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: Lyman Alpha Photometer Description of subject: Lyman Alpha Photometer is a scientific instrument aboard India's Mars Orbiter Mission designed to study the Martian upper atmosphere by measuring hydrogen and deuterium emissions in the Lyman-alpha spectral line.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Mangalyaan