def test1():
tel = Telescope()
# Spiral parameters for inner and outer regions.
start_inner = 417.82
end_inner = 1572.13
b_inner = 0.513
start_outer = 2146.78
end_outer = 6370.13
b_outer = 0.52
# Add all stations out to 6500 m.
tel.add_ska1_v5(r_min=500, r_max=6500)
# Add the cluster centres.
tel.add_symmetric_log_spiral(5, start_inner, end_inner, b_inner,
3, 'cluster_centres_inner', -48)
tel.add_symmetric_log_spiral(5, start_outer, end_outer, b_outer,
3, 'cluster_centres_outer', 135)
# Fill in the gaps with spirals.
b = 0.515
tel.add_symmetric_log_spiral(60, start_inner, end_outer, b,
3, 'spiral_arms', -48)
tel.plot_layout(plot_radii=[start_inner, end_inner, start_outer, end_outer],
show_decorations=False)
def test2():
tel = Telescope()
tel.add_uniform_core(200, 1000)
tel.add_ska1_v5(r_min=1000)
tel.add_ska1_v5(r_min = 500, r_max = 1000)
fig = tel.plot_layout()
ax = fig.gca()
ax.add_artist(plt.Circle((0, 0), radius=500, fill=False, color='r'))
ax.add_artist(plt.Circle((0, 0), radius=1000, fill=False, color='r'))
plt.show()
plt.close(fig)
def test3():
tel = Telescope()
tel.add_uniform_core(368, 5000)
tel.add_ska1_v5(r_min=5000)
x, y, z = tel.coords()
fig, ax = plt.subplots()
for xy in zip(x, y):
ax.add_artist(plt.Circle(xy, radius=(tel.station_diameter_m / 2),
fill=False))
ax.set_aspect('equal')
ax.set_xlim(-8000, 8000)
ax.set_ylim(-8000, 8000)
plt.show()
plt.close(fig)
def test3():
# Current SKA1 V5 design.
tel = Telescope()
tel.add_ska1_v5(None, 6400)
tel.plot_layout(plot_radii=[500, 6400], color='k')
# Generate new telescopes by expanding each station cluster.
b = 0.515
theta0_deg = -48
start_inner = 417.82
num_arms = 3
d_theta = 360 / num_arms
# Get cluster radii.
cluster_x, cluster_y, arm_index = Telescope.cluster_centres_ska_v5(0, 6400)
cluster_r = (cluster_x**2 + cluster_y**2)**0.5
cluster_r = cluster_r[::3] # Get every 3rd radius.
delta_theta_deg = Telescope.delta_theta(
cluster_x[0], cluster_y[0], cluster_x[3], cluster_y[3], start_inner, b)
# Loop over cluster radii.
for i in range(len(cluster_r)):
# Create the telescope and add the core.
tel1 = Telescope()
tel1.add_ska1_v5(None, 500)
# Add SKA1 V5 clusters from this radius outwards.
if i < len(cluster_r) - 1:
r = cluster_r[i + 1]
tel1.add_ska1_v5(r - 90, 6400)
# Add spiral sections up to this radius.
for j in range(i + 1):
for k in range(num_arms):
idx = num_arms * j + k
tel1.add_log_spiral_section(
6, start_inner,
cluster_x[idx], cluster_y[idx],
b, delta_theta_deg / 2.0,
theta0_deg + arm_index[idx] * d_theta)
tel1.add_circular_arc(
6, cluster_x[idx], cluster_y[idx], d_theta)
# NOTE(BM) Telescope exists here ... add metrics
tel1.plot_layout(plot_radii=[500, 6400], color='k', show_decorations=True)
