<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_range(self, process_err_pct=0.05):
 """ Returns slant range to the object. Call once for each new measurement at dt time from last call. """


        vel = self.vel + 5 * randn()
        alt = self.alt + 10 * randn()

        self.pos += vel*self.dt

        err = (self.pos * process_err_pct) * randn()
        slant_range = (self.pos**2 + alt**2)**.5 + err

        return slant_range