我尝试在极坐标图中以度数表示球坐标方位角和仰角。我有一组值可以测试0度,90度,180度和270度,并且可以清楚地看到它们并未以应有的方位角值绘制。
代码:
from matplotlib.pyplot import rc, grid, figure, plot, rcParams, savefig
def generate_satellite_plot(observer_lat, observer_lon):
rc('grid', color='#316931', linewidth=1, linestyle='-')
rc('xtick', labelsize=15)
rc('ytick', labelsize=15)
# force square figure and square axes looks better for polar, IMO
width, height = rcParams['figure.figsize']
size = min(width, height)
# make a square figure
fig = figure(figsize=(size, size))
ax = fig.add_axes([0.1, 0.1, 0.8, 0.8], polar=True, axisbg='#d5de9c')
ax.set_theta_zero_location('N')
ax.set_theta_direction(-1)
sat_positions = [[1, 30, 0], [2, 60, 90], [3, 30, 180], [4, 50, 270]]
for (PRN, E, Az) in sat_positions:
ax.annotate(str(PRN),
xy=(Az, 90-E), # theta, radius
bbox=dict(boxstyle="round", fc = 'green', alpha = 0.5),
horizontalalignment='center',
verticalalignment='bottom')
ax.set_yticks(range(0, 90, 10)) # Define the yticks
yLabel = ['90', '', '', '60', '', '', '30', '', '', '']
ax.set_yticklabels(yLabel)
grid(True)
savefig('foo.png')
这是结果,显然是不准确的:
我更改了轴,使它们从0度开始,然后沿顺时针方向旋转,并且半径表示高程(从圆心的90º到边界的0º)。
迟了,但是:
代码:
from matplotlib.pyplot import rc, grid, figure, plot, rcParams, savefig
from math import radians
def generate_satellite_plot(observer_lat, observer_lon):
rc('grid', color='#316931', linewidth=1, linestyle='-')
rc('xtick', labelsize=15)
rc('ytick', labelsize=15)
# force square figure and square axes looks better for polar, IMO
width, height = rcParams['figure.figsize']
size = min(width, height)
# make a square figure
fig = figure(figsize=(size, size))
ax = fig.add_axes([0.1, 0.1, 0.8, 0.8], polar=True, axisbg='#d5de9c')
ax.set_theta_zero_location('N')
ax.set_theta_direction(-1)
sat_positions = [[1, 30, 0], [2, 60, 90], [3, 30, 180], [4, 50, 270]]
for (PRN, E, Az) in sat_positions:
ax.annotate(str(PRN),
xy=(radians(Az), 90-E), # theta, radius
bbox=dict(boxstyle="round", fc = 'green', alpha = 0.5),
horizontalalignment='center',
verticalalignment='center')
ax.set_yticks(range(0, 90+10, 10)) # Define the yticks
yLabel = ['90', '', '', '60', '', '', '30', '', '', '']
ax.set_yticklabels(yLabel)
grid(True)
savefig('foo.png')
结果:
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