It’s also possible to get at the actual visibilities in a UV data set. Here is a little script that uses matplotlib to make a UV coverage plot:

from Wizardry.AIPSData import AIPSUVData
from AIPS import AIPS
 
from pylab import plot, show
 
AIPS.userno = 667
 
data = AIPSUVData('MULTI', 'UVDATA', 1, 3)
u = []
v = []
for visibility in data:
    u.append(visibility.uvw[0])
    v.append(visibility.uvw[1])
 
plot(u, v, '.')
show()