本文整理匯總了Python中galpy.orbit.Orbit.ra方法的典型用法代碼示例。如果您正苦於以下問題：Python Orbit.ra方法的具體用法？Python Orbit.ra怎麽用？Python Orbit.ra使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類galpy.orbit.Orbit的用法示例。
在下文中一共展示了Orbit.ra方法的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: test_orbmethods
# 需要導入模塊: from galpy.orbit import Orbit [as 別名]
# 或者: from galpy.orbit.Orbit import ra [as 別名]
def test_orbmethods():
from galpy.orbit import Orbit
from galpy.potential import MWPotential2014
o= Orbit([0.8,0.3,0.75,0.,0.2,0.]) # setup R,vR,vT,z,vz,phi
times= numpy.linspace(0.,10.,1001) # Output times
o.integrate(times,MWPotential2014) # Integrate
o.E() # Energy
assert numpy.fabs(o.E()+1.2547650648697966) < 10.**-5., 'Orbit method does not work as expected'
o.L() # Angular momentum
assert numpy.all(numpy.fabs(o.L()-numpy.array([[ 0. , -0.16, 0.6 ]])) < 10.**-5.), 'Orbit method does not work as expected'
o.Jacobi(OmegaP=0.65) #Jacobi integral E-OmegaP Lz
assert numpy.fabs(o.Jacobi(OmegaP=0.65)-numpy.array([-1.64476506])) < 10.**-5., 'Orbit method does not work as expected'
o.ER(times[-1]), o.Ez(times[-1]) # Rad. and vert. E at end
assert numpy.fabs(o.ER(times[-1])+1.27601734263047) < 10.**-5., 'Orbit method does not work as expected'
assert numpy.fabs(o.Ez(times[-1])-0.021252201847851909) < 10.**-5., 'Orbit method does not work as expected'
o.rperi(), o.rap(), o.zmax() # Peri-/apocenter r, max. |z|
assert numpy.fabs(o.rperi()-0.44231993168097) < 10.**-5., 'Orbit method does not work as expected'
assert numpy.fabs(o.rap()-0.87769030382105) < 10.**-5., 'Orbit method does not work as expected'
assert numpy.fabs(o.zmax()-0.077452357289016) < 10.**-5., 'Orbit method does not work as expected'
o.e() # eccentricity (rap-rperi)/(rap+rperi)
assert numpy.fabs(o.e()-0.32982348199330563) < 10.**-5., 'Orbit method does not work as expected'
o.R(2.,ro=8.) # Cylindrical radius at time 2. in kpc
assert numpy.fabs(o.R(2.,ro=8.)-3.5470772876920007) < 10.**-3., 'Orbit method does not work as expected'
o.vR(5.,vo=220.) # Cyl. rad. velocity at time 5. in km/s
assert numpy.fabs(o.vR(5.,vo=220.)-45.202530965094553) < 10.**-3., 'Orbit method does not work as expected'
o.ra(1.), o.dec(1.) # RA and Dec at t=1. (default settings)
# 5/12/2016: test weakened, because improved galcen<->heliocen
# transformation has changed these, but still close
assert numpy.fabs(o.ra(1.)-numpy.array([ 288.19277])) < 10.**-1., 'Orbit method does not work as expected'
assert numpy.fabs(o.dec(1.)-numpy.array([ 18.98069155])) < 10.**-1., 'Orbit method does not work as expected'
o.jr(type='adiabatic'), o.jz() # R/z actions (ad. approx.)
assert numpy.fabs(o.jr(type='adiabatic')-0.05285302231137586) < 10.**-3., 'Orbit method does not work as expected'
assert numpy.fabs(o.jz()-0.006637988850751242) < 10.**-3., 'Orbit method does not work as expected'
# Rad. period w/ Staeckel approximation w/ focal length 0.5,
o.Tr(type='staeckel',delta=0.5,ro=8.,vo=220.) # in Gyr
assert numpy.fabs(o.Tr(type='staeckel',delta=0.5,ro=8.,vo=220.)-0.1039467864018446) < 10.**-3., 'Orbit method does not work as expected'
o.plot(d1='R',d2='z') # Plot the orbit in (R,z)
o.plot3d() # Plot the orbit in 3D, w/ default [x,y,z]
return None示例2: Orbit
# 需要導入模塊: from galpy.orbit import Orbit [as 別名]
# 或者: from galpy.orbit.Orbit import ra [as 別名]
o.integrate(ts, MWPotential, method='dopr54_c')
##Integrating Forward in time
newOrbit = Orbit([o.R(TIME), -o.vR(TIME), -o.vT(TIME), o.z(TIME), -o.vz(TIME), o.phi(TIME)],ro=8.,vo=220.)
newOrbit.turn_physical_off()
newOrbit.integrate(ts, MWPotential, method='dopr54_c')
def randomVelocity(std=.001):
if type(std).__name__ == "Quantity":
return nu.random.normal(scale=std.value)*std.unit
return nu.random.normal(scale=std)
time1 = nu.arange(0, TIME.value, dt.value)*units.Myr
orbits_pos = nu.empty((len(time1) + 1,9,len(ts)), dtype=units.quantity.Quantity)
orbits_pos[0, :, :] = ts, newOrbit.x(ts), newOrbit.y(ts), newOrbit.z(ts), newOrbit.vx(ts), newOrbit.vy(ts), newOrbit.vz(ts), newOrbit.ra(ts), newOrbit.dec(ts)
orbits_pos[:,:,:] = orbits_pos[0,:,:]
i = 0
std = 0.004
stdR = std
stdT = std
stdz = std
for t in time1:
print t
dvR = randomVelocity(stdR)
dvT = randomVelocity(stdT)
dvz = randomVelocity(stdz)
#dvR, dvT, dvz = 0,0,0
tempOrbit = Orbit([newOrbit.R(t), newOrbit.vR(t) + dvR, newOrbit.vT(t) + dvT, newOrbit.z(t), newOrbit.vz(t) + dvz, newOrbit.phi(t)],ro=8.,vo=220.)
tempOrbit.turn_physical_off()
time = nu.arange(0,(TIME + step_size - t).value,step_size.value)*units.Myr