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Lambert Exposin Test
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import PyKEP as pk | |
import matplotlib as mpl | |
from mpl_toolkits.mplot3d import Axes3D | |
import matplotlib.pyplot as plt | |
r1 = [149.0e9, 0.0, 0.0] | |
r2 = [300.0e9, -100.0e9, 0.0] | |
mu = 1.32e20 | |
tof = 86400 * 550.0 | |
lw = True | |
isp = 5000 | |
mass = 4000 | |
prob = pk.lambert_exposin(r1,r2,tof,mu,lw) | |
print prob | |
exp1 = prob.get_exposins()[0] | |
print 'Final mass: %.1f kg' % exp1.get_final_mass(mu, isp, mass) | |
print 'Maximum thrust needed: %.3f N' % exp1.get_maximum_thrust(mu, isp, mass) | |
fig = plt.figure() | |
axis = fig.gca(projection='3d') | |
axis.scatter([0],[0],[0],color='y') | |
axis.scatter([r1[0]],[r1[1]],[r1[2]],color='b') | |
axis.scatter([r2[0]],[r2[1]],[r2[2]],color='b') | |
pk.orbit_plots.plot_lambert_exposin(prob,axis,sol=0) | |
plt.show() |
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