Earth gravity model
E79831
The Earth gravity model is a mathematical representation of Earth's gravitational field used for precise positioning, navigation, and geodetic calculations.
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
geophysical model
ⓘ
gravitational field model ⓘ mathematical model ⓘ |
| appliedIn |
GNSS positioning
ⓘ
crustal deformation studies ⓘ hydrology studies ⓘ ocean circulation studies ⓘ reference frame realization ⓘ satellite orbit propagation ⓘ space mission design ⓘ |
| approximates |
gravity anomalies
ⓘ
normal gravity field ⓘ |
| basedOn |
Newtonian celestial mechanics
ⓘ
surface form:
Newtonian gravity
spherical harmonics expansion ⓘ |
| characterizes |
Earth geoid shape
ⓘ
Earth mass distribution ⓘ |
| dataSource |
gravimetry measurements
ⓘ
oceanographic data ⓘ satellite altimetry ⓘ satellite tracking data ⓘ terrestrial gravity surveys ⓘ |
| dependsOn |
height above ellipsoid
ⓘ
latitude ⓘ longitude ⓘ time ⓘ |
| describes | Earth gravitational field ⓘ |
| developedBy |
geodesists
ⓘ
geophysical research institutions ⓘ space agencies ⓘ |
| hasComponent |
sectorial harmonics
ⓘ
tesseral harmonics ⓘ zonal harmonics ⓘ |
| includes |
Earth flattening
ⓘ
Earth rotation effects ⓘ atmospheric mass variations ⓘ ocean tides ⓘ solid Earth tides ⓘ tidal effects ⓘ |
| relatedTo |
WGS84
ⓘ
surface form:
World Geodetic System
geoid model ⓘ reference ellipsoid ⓘ |
| represents |
Earth gravitational potential
ⓘ
spatial variations of Earth gravity ⓘ |
| usedFor |
geodetic calculations
ⓘ
geoid determination ⓘ inertial navigation system calibration ⓘ mapping gravity anomalies ⓘ orbit determination ⓘ precise positioning ⓘ satellite navigation ⓘ sea level studies ⓘ |