state_vector_from_geodetic_state

Ellipsoid.state_vector_from_geodetic_state(self, geostate: ndarray[GeodeticState_dtype]) → tuple[ndarray[double], 2]

Convert geodetic state(s) to Cartesian state vector(s).

Given an array of geodetic states (longitude, latitude, altitude, and their rates), this method computes the corresponding Cartesian position and velocity vectors in an Earth-centered frame.

Parameters:

geostatendarray of GeodeticState_dtype, shape (N,)

Structured array with fields:

• lonfloat

  Geodetic longitude [radians].

• latfloat

  Geodetic latitude [radians].

• altfloat

  Geodetic altitude [meters].

• lon_dotfloat

  Time derivative of longitude [radians/second].

• lat_dotfloat

  Time derivative of latitude [radians/second].

• alt_dotfloat

  Time derivative of altitude [meters/second].

Returns:

rndarray of shape (N, 3)

Position vectors in Cartesian coordinates [meters].

vndarray of shape (N, 3)

Velocity vectors in Cartesian coordinates [meters/second].

Notes

• The function processes each geodetic state entry to compute the corresponding position and velocity vectors.

• Internally calls a Cython implementation for performance.

• All angles are in radians.