Package org.orekit.models.earth

This package provides models that simulate certain physical phenomena of Earth and the near-Earth environment.

Currently the following models are included:

• Tropospheric Delay
• Ionospheric Delay
• Global weather
• Geomagnetic Field
• Geoid
• Atmospheric refraction
• Displacement of ground points
• Tessellation of zones of interest as tiles
• Sampling of zones of interest as grids of points

Geoid

A Geoid is an equipotential surface of Earth's gravity field. This package provides the means to compute a Geoid from the gravity field harmonic coefficients, as in the following example. See the comment for Geoid for some important caveats.

 ReferenceEllipsoid ellipsoid
         = new ReferenceEllilpsoid(a, f, bodyFrame, GM, spin);
 Geoid geoid = new Geoid(
         GravityFieldFactory.getNormalizedProvider(degree, order),
         ellipsoid);
 double undulation = geoid.getUndulation(lat, lon, date);
 

Author:

T. Neidhart, E. Ward

Interface Summary

Interface	Description
EarthShape	All models of Earth's shape have some common properties that are not shared with arbitrary BodyShapes.
GeoMagneticFields	Methods for obtaining geomagnetic fields.

Class Summary

Class	Description
EarthITU834AtmosphereRefraction	Implementation of refraction model for Earth exponential atmosphere based on ITU-R P.834-9 recommendation.
EarthStandardAtmosphereRefraction	Implementation of refraction model for Earth standard atmosphere.
Geoid	A geoid is a level surface of the gravity potential of a body.
GeoMagneticElements	Contains the elements to represent a magnetic field at a single point.
GeoMagneticField	Used to calculate the geomagnetic field at a given geodetic point on earth.
GeoMagneticFieldFactory	Factory for different GeoMagneticField models.
GeoMagneticModelLoader	Loads geomagnetic field models from a given input stream.
LazyLoadedGeoMagneticFields	Loads magnetic fields on request and can be configured after creation.
ReferenceEllipsoid	A Reference Ellipsoid for use in geodesy.

Enum Summary

Enum	Description
GeoMagneticFieldFactory.FieldModel	The currently supported geomagnetic field models.