`pos_from_lla`#

Ellipsoid.pos_from_lla(self, lat: double | ndarray[double], lon: double | ndarray[double], alt: double | ndarray[double]) → ndarray[double]#

Compute ECEF position vector(s) from geodetic coordinates.

Given a scalar or 1-D arrays of geodetic latitude \(\phi\), longitude \(\lambda\), and altitude \(h\) (in radians and metres, SI), return the corresponding Earth-Centered, Earth-Fixed (ECEF) coordinate(s) \([x, y, z]\).

Parameters:

latfloat or ndarray of float, shape () or (N,): Geodetic latitude \(\phi\) in radians.
lonfloat or ndarray of float, shape () or (N,): Geodetic longitude \(\lambda\) in radians.
altfloat or ndarray of float, shape () or (N,): Altitude \(h\) above the reference ellipsoid in metres.

Returns:

rndarray of float, shape (3,) or (N, 3)

ECEF position vector(s) in metres, where

\[N(\phi) = \]

rac{a}{sqrt{1 - e^2 sin^2phi}}

x = igl(N(phi) + higr)cosphi coslambda

y = igl(N(phi) + higr)cosphi sinlambda

z = Bigl(N(phi),(1 - e^2) + hBigr)sinphi

Raises:

AssertionError: If lat, lon, and alt are not all scalars or 1-D arrays of the same length.

pos_from_lla#

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`pos_from_lla`#