In message , Art Unwin
KB9MZ writes
Looking for a site or information on incoming
radiation angles specifically for 160 metres.

1 How is it measured ?

The same way it was measured in the 20's for B/C reception. Two
separated antennas at different heights feeding an oscilloscope to
produce an ellipse. The phase difference between the antennas allows the
angle to be calculated.

Mike

--
M.J.Powell