International Geomagnetic Reference Field
E651434
The International Geomagnetic Reference Field is a standardized mathematical model describing Earth’s main magnetic field and its secular variation, used globally for navigation, geophysical research, and defining geomagnetic coordinates.
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
geomagnetic field model
ⓘ
mathematical model ⓘ scientific standard ⓘ |
| abbreviation | IGRF NERFINISHED ⓘ |
| applicationDomain |
aeronautics
ⓘ
geodesy ⓘ geomagnetism ⓘ marine navigation ⓘ space weather ⓘ |
| assumes |
no electric currents in modeling region
ⓘ
potential field outside Earth’s core ⓘ |
| coordinateSystem | geocentric spherical harmonic representation ⓘ |
| dataSources |
magnetic observatories
ⓘ
marine and aeromagnetic surveys ⓘ satellite magnetic measurements ⓘ |
| describes |
Earth’s main magnetic field
ⓘ
secular variation of Earth’s magnetic field ⓘ |
| doesNotModel | external magnetic field sources ⓘ |
| doesNotModel | small-scale crustal magnetic anomalies ⓘ |
| epochInterval | 5 years ⓘ |
| firstEpochYear | 1965 ⓘ |
| governingBody | International Association of Geomagnetism and Aeronomy NERFINISHED ⓘ |
| latestVersionPublisher | International Association of Geomagnetism and Aeronomy NERFINISHED ⓘ |
| mathematicalForm | spherical harmonic expansion ⓘ |
| models | internal part of Earth’s magnetic field ⓘ |
| parentOrganization | International Union of Geodesy and Geophysics NERFINISHED ⓘ |
| provides | Gauss coefficients of Earth’s main field ⓘ |
| referenceFrame | Earth-centered Earth-fixed ⓘ |
| relatedConcept |
World Magnetic Model
NERFINISHED
ⓘ
geomagnetic coordinates ⓘ geomagnetic dipole ⓘ |
| sponsor | International Association of Geomagnetism and Aeronomy NERFINISHED ⓘ |
| standardizedBy | International Association of Geomagnetism and Aeronomy NERFINISHED ⓘ |
| timeDependence |
epoch-based representation
ⓘ
piecewise-linear secular variation model ⓘ |
| updatedBy | IAGA Working Group V-MOD NERFINISHED ⓘ |
| updateFrequency | every 5 years ⓘ |
| usedAs | global geomagnetic reference standard ⓘ |
| usedFor |
aeromagnetic survey data reduction
ⓘ
defining geomagnetic coordinates ⓘ geophysical research ⓘ magnetic observatory data interpretation ⓘ navigation ⓘ satellite data analysis ⓘ space physics applications ⓘ |
| validRegion |
Earth’s surface
ⓘ
altitudes up to low Earth orbit ⓘ near-Earth space ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.