示例#1
0
def Asincos(i):
  epoch = t * i / N
  state = sp.conics(elts,epoch)
  trueAnom = sp.recrad(state[:3])[1]
  return state[3:5],numpy.array([math.cos(trueAnom),math.sin(trueAnom),1])
示例#2
0
inc=0.
lnode=0.
argp=0.
m0=0.
t0=0.
mu=398600.4415

a=rp/(1-ecc)
b=a*math.sqrt(1-ecc**2)
p=b*b/a

t=2*sp.pi()*math.sqrt(a**3/mu)

elts=[rp,ecc,inc,lnode,argp,m0,t0,mu]

print(sp.conics(elts,0.))
print(sp.conics(elts,0.+t/2))
print(sp.conics(elts,0.+t))

print(dict(a=a,b=b,p=p,t=t,elts=elts,sqrtMuOverP=math.sqrt(mu/p),eccSqrtMuOverP=ecc*math.sqrt(mu/p)))

N = 100

def Asincos(i):
  epoch = t * i / N
  state = sp.conics(elts,epoch)
  trueAnom = sp.recrad(state[:3])[1]
  return state[3:5],numpy.array([math.cos(trueAnom),math.sin(trueAnom),1])

tup = map(Asincos,xrange(N))