Ejemplo n.º 1
0
 def kepler_state(self, dt):
     sma, ecc, inc, node, peri, true_ano = self.elements
     mean_ano = kepler.true_to_mean(true_ano, ecc)
     mean_ano1 = dt*self.mean_motion + mean_ano
     true_ano1 = kepler.mean_to_true(mean_ano1, ecc) 
     rv = kepler.cartesian(self.body.mu, sma, ecc, inc, node, peri, true_ano1)
     return State(rv[:3]*self.r.unit, rv[3:]*self.v.unit,
         self.t+TimeDelta(dt, format='sec'),
         self.frame, self.body)
Ejemplo n.º 2
0
 def kepler_state(self, dt):
     sma, ecc, inc, node, peri, true_ano = self.elements
     mean_ano = kepler.true_to_mean(true_ano, ecc)
     mean_ano1 = dt * self.mean_motion + mean_ano
     true_ano1 = kepler.mean_to_true(mean_ano1, ecc)
     rv = kepler.cartesian(self.body.mu, sma, ecc, inc, node, peri,
                           true_ano1)
     return State(rv[:3] * self.r.unit, rv[3:] * self.v.unit,
                  self.t + TimeDelta(dt, format='sec'), self.frame,
                  self.body)
Ejemplo n.º 3
0
 def kepler_orbit(self, n=100):
     dt = np.linspace(0, self.period, n)
     sma, ecc, inc, node, peri, ano1 = self.elements
     mean_ano = kepler.true_to_mean(ano1, ecc)
     mean_ano1 = dt*self.mean_motion + mean_ano
     ano = units.Quantity([kepler.mean_to_true(m, ecc) for m in mean_ano1])
     sma = np.repeat(sma, n)
     ecc = np.repeat(ecc, n)
     inc = np.repeat(inc, n)
     node = np.repeat(node, n)
     peri = np.repeat(peri, n)
     epochs = self.t + TimeDelta(dt, format='sec')
     states = kepler.cartesian(self.body.mu, sma, ecc, inc, node, peri, ano)
     return Orbit(
         deepcopy(self), dt, epochs, states,
         elements=[sma, ecc, inc, node, peri, ano]
     )
Ejemplo n.º 4
0
 def kepler_orbit(self, n=100):
     dt = np.linspace(0, self.period, n)
     sma, ecc, inc, node, peri, ano1 = self.elements
     mean_ano = kepler.true_to_mean(ano1, ecc)
     mean_ano1 = dt * self.mean_motion + mean_ano
     ano = units.Quantity([kepler.mean_to_true(m, ecc) for m in mean_ano1])
     sma = np.repeat(sma, n)
     ecc = np.repeat(ecc, n)
     inc = np.repeat(inc, n)
     node = np.repeat(node, n)
     peri = np.repeat(peri, n)
     epochs = self.t + TimeDelta(dt, format='sec')
     states = kepler.cartesian(self.body.mu, sma, ecc, inc, node, peri, ano)
     return Orbit(deepcopy(self),
                  dt,
                  epochs,
                  states,
                  elements=[sma, ecc, inc, node, peri, ano])