50 MHz radio horizon

 

This image shows the radiohorizon as seen in a 20km radius. Only 4 spots give me a positive horizon, the main one at 67° which is only 1km away. But seen the occupied azimuth range it is to be neglected. All other directions give me a negative horizon and hughe ground gain. Most important is that it gives me a low take off angle. The take off angle off the array is between 1° and 2°. I have noticed echos on EME with 30 watts output