docs: def enu_to_ecef_vector(east, north, up, glat, glong):
      """Converts vector from East, North, Up components to ECEF
      
      Position of vector in geospace may be specified in either
      geocentric or geodetic coordinates, with corresponding expression
      of the vector using radial or ellipsoidal unit vectors.
      
      Parameters
      ----------
      east : float or array-like
          Eastward component of vector
      north : float or array-like
          Northward component of vector
      up : float or array-like
          Upward component of vector
      latitude : float or array_like
          Geodetic or geocentric latitude (degrees)
      longitude : float or array_like
          Geodetic or geocentric longitude (degrees)
      
      Returns
      -------
      x, y, z
          Vector components along ECEF x, y, and z directions
      
      """
      
      # convert lat and lon in degrees to radians
      rlat = np.radians(glat)
      rlon = np.radians(glong)
      
      x = -east*np.sin(rlon) - north*np.cos(rlon)*np.sin(rlat) + up*np.cos(rlon)*np.cos(rlat)
      y = east*np.cos(rlon) - north*np.sin(rlon)*np.sin(rlat) + up*np.sin(rlon)*np.cos(rlat)
      z = north*np.cos(rlat) + up*np.sin(rlat)
  
      return x, y, z