Shallow Radar
E495764
Shallow Radar is a subsurface sounding radar instrument used to probe and map the shallow underground structure of Mars, including buried ice and layering.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Shallow Radar canonical | 1 |
| WISDOM ground-penetrating radar | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5126049 — 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: Shallow Radar Context triple: [Mars Reconnaissance Orbiter, instrumentFullName, Shallow Radar]
-
A.
APY-10 multi-mission surface search radar
The APY-10 multi-mission surface search radar is an advanced maritime surveillance and targeting radar system used on platforms like the Boeing P-8 Poseidon for detecting, tracking, and classifying surface and subsurface contacts in all weather conditions.
-
B.
Erieye radar
The Erieye radar is a Swedish airborne early warning and control (AEW&C) radar system known for its active electronically scanned array (AESA) technology and long-range surveillance capabilities.
-
C.
ASDIC sonar
ASDIC sonar was an early underwater detection system used primarily by Allied naval forces to locate and track submarines using sound waves.
-
D.
H2S radar
H2S radar was a World War II-era British airborne ground-mapping radar system used by bombers for navigation and target identification, especially at night and in poor weather.
-
E.
RIMFAX
RIMFAX is a ground-penetrating radar instrument on NASA’s Perseverance rover designed to image the subsurface structure of Mars.
- 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: Shallow Radar Target entity description: Shallow Radar is a subsurface sounding radar instrument used to probe and map the shallow underground structure of Mars, including buried ice and layering.
-
A.
APY-10 multi-mission surface search radar
The APY-10 multi-mission surface search radar is an advanced maritime surveillance and targeting radar system used on platforms like the Boeing P-8 Poseidon for detecting, tracking, and classifying surface and subsurface contacts in all weather conditions.
-
B.
Erieye radar
The Erieye radar is a Swedish airborne early warning and control (AEW&C) radar system known for its active electronically scanned array (AESA) technology and long-range surveillance capabilities.
-
C.
ASDIC sonar
ASDIC sonar was an early underwater detection system used primarily by Allied naval forces to locate and track submarines using sound waves.
-
D.
H2S radar
H2S radar was a World War II-era British airborne ground-mapping radar system used by bombers for navigation and target identification, especially at night and in poor weather.
-
E.
RIMFAX
RIMFAX is a ground-penetrating radar instrument on NASA’s Perseverance rover designed to image the subsurface structure of Mars.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
planetary science instrument
ⓘ
radar instrument ⓘ subsurface sounding radar ⓘ |
| abbreviation | SHARAD NERFINISHED ⓘ |
| arrivalAtMarsOfHostMission | 2006-03-10 ⓘ |
| bandwidth | 10 MHz ⓘ |
| centralFrequency | 20 MHz ⓘ |
| contributedToDiscovery |
buried impact basins and channels on Mars
ⓘ
internal structure of Martian polar layered deposits ⓘ thick ice-rich deposits in mid-latitudes of Mars ⓘ |
| dataArchive | NASA Planetary Data System NERFINISHED ⓘ |
| dataProduct |
radargrams
ⓘ
subsurface reflectivity profiles ⓘ |
| designedFor | high along-track resolution of Martian subsurface ⓘ |
| developedBy |
Italian Space Agency
NERFINISHED
ⓘ
Jet Propulsion Laboratory NERFINISHED ⓘ University of Rome La Sapienza NERFINISHED ⓘ |
| frequencyBand | VHF ⓘ |
| fullName | Shallow Radar NERFINISHED ⓘ |
| horizontalResolution | ~0.3–1 km along track ⓘ |
| hostMission | Mars Reconnaissance Orbiter NERFINISHED ⓘ |
| launchDateOfHostMission | 2005-08-12 ⓘ |
| measurementType |
radar sounding
ⓘ
subsurface profiling ⓘ |
| operatedOn | Mars Reconnaissance Orbiter NERFINISHED ⓘ |
| operatesIn |
nadir-looking mode
ⓘ
off-nadir clutter-suppression mode ⓘ |
| operatingEnvironment | Martian orbit ⓘ |
| operationalStatus | active for multiple Martian years after MRO arrival ⓘ |
| penetrationDepth |
up to several hundred meters in Martian subsurface
ⓘ
up to ~1 km in low-loss materials ⓘ |
| platformType | orbiter-mounted instrument ⓘ |
| primaryTarget | Mars NERFINISHED ⓘ |
| relatedInstrument | MARSIS NERFINISHED ⓘ |
| relatedInstrumentOn | Mars Express NERFINISHED ⓘ |
| scientificObjective |
characterize subsurface layering on Mars
ⓘ
map buried ice on Mars ⓘ probe shallow subsurface of Mars ⓘ study geologic structure of Martian crust ⓘ |
| spaceAgency | NASA ⓘ |
| uses |
detection of buried ice deposits
ⓘ
investigation of polar layered deposits ⓘ mapping of subsurface stratigraphy ⓘ study of volcanic and sedimentary structures ⓘ |
| verticalResolution |
~15 m in free space
ⓘ
~8–15 m in Martian subsurface materials ⓘ |
| wavelengthRange | ~15 m free-space wavelength ⓘ |
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: Shallow Radar Description of subject: Shallow Radar is a subsurface sounding radar instrument used to probe and map the shallow underground structure of Mars, including buried ice and layering.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
WISDOM ground-penetrating radar