class_docstr: Simulates the radar signal returns from an object flying
  at a constant altityude and velocity in 1D. Assumes random
  process noise - altitude and velocity varies a bit for each call.
class_docstr_tok: ["Simulates","the","radar","signal","returns","from","an","object","flying","at","a","constant","altityude","and","velocity","in","1D",".","Assumes","random","process","noise","-","altitude","and","velocity","varies","a","bit","for","each","call","."]
code: def __init__(self, dt, pos=0.0, vel=100.0, alt=1000.0):
      self.dt = dt
      self.pos = pos
      self.vel = vel
      self.alt = alt
  
imports: from numpy.random import randn
label_desc: Use image node_id 1 to create a new RadarSim object from inherited base classes: object with example: obj = RadarSim(dt, pos, vel, alt)