code: def fx(x, dt):
      """state transition function for sstate [downrange, vel, altitude]"""
      F = np.array([[1.0, dt, 0.0], [0.0, 1.0, 0.0], [0.0, 0.0, 1.0]])
  
      return np.dot(F, x)
  
file_path: filterpy/filterpy/examples/RadarUKF.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import numpy
  import scipy.linalg
  import matplotlib.pyplot
  from GetRadar import get_radar
  from filterpy.kalman import UnscentedKalmanFilter
  from filterpy.common import Q_discrete_white_noise
label_desc: Use image node_id 1 for calling a global function with example usage: fx(x, dt) and returns: np