chaosmagpy.coordinate_utils.gg_to_geo¶
- chaosmagpy.coordinate_utils.gg_to_geo(height, beta, X=None, Z=None)[source]¶
Compute spherical geographic coordinates and components from geodetic coordinates and components as defined by the World Geodetic System 1984 (WGS84).
The equatorial and polar radius of the ellipsoid that approximates Earth’s surface are stored in
chaosmagpy.basicConfig['params.ellipsoid'].- Parameters:
- heightndarray, shape (…)
Altitude in kilometers.
- betandarray, shape (…)
Geodetic colatitude
- Xndarray, shape (…), optional
Geodetic northward vector component.
- Zndarray, shape (…), optional
Geodetic downward vector component.
- Returns:
- radiusndarray, shape (…)
Radius in kilometers.
- thetandarray, shape (…)
Geocentric colatitude in degrees.
- B_radiusndarray, shape (…), optional
Radially upward vector component (only returned if
XandZare provided).- B_thetandarray, shape (…), optional
Spherical southward vector component (only returned if
XandZare provided).
References
The coordinate transformations are taken from Equations (51)-(53) in “The main field” (chapter 4) by Langel, R. A. in: “Geomagnetism”, Volume 1, Jacobs, J. A., Academic Press, 1987. The vector rotation is taken from Equation (4) in “5.02 - The Present and Future Geomagnetic Field” by Hulot et al. in: Treatise on Geophysics, Elsevier, 2015.