clouddrift.sphere.tangentplane_to_cartesian#
- clouddrift.sphere.tangentplane_to_cartesian(up: float | ndarray, vp: float | ndarray, longitude: float | ndarray, latitude: float | ndarray) tuple[float] | tuple[ndarray][source]#
Return the three-dimensional Cartesian components of a vector contained in a plane tangent to a spherical Earth.
The Cartesian coordinate system is a right-handed system whose origin lies at the center of a sphere. It is oriented with the Z-axis passing through the north pole at lat = 90, the X-axis passing through the point lon = 0, lat = 0, and the Y-axis passing through the point lon = 90, lat = 0.
Parameters#
- up: float or np.ndarray
First component of vector on tangent plane (positive eastward).
- vp: float or np.ndarray
Second component of vector on tangent plane (positive northward).
- longitudefloat or np.ndarray
Longitude in degrees of tangent point of plane.
- latitudefloat or np.ndarray
Latitude in degrees of tangent point of plane.
Returns#
- ufloat or np.ndarray
First component of Cartesian vector.
- vfloat or np.ndarray
Second component of Cartesian vector.
- wfloat or np.ndarray
Third component of Cartesian vector.
Examples#
>>> u, v, w = tangentplane_to_cartesian(1, 1, 45, 90)
Notes#
This function is inverted by
cartesian_to_tangetplane().See Also#