Free Fresnel Zone for Google Earth

I like to study high frequency RF propagation using Google Earth.  Here is a way to get a plot of the Fresnel Zone for free.

First you need to know the Longitude, Latitude, and Altitude from sea level of the Node of both locations.  You will also need to know the frequency that will be using.  Enter this information at the following website along with the Zone.  Zone of 1 = the 1st fresnel zone.  Enter .6 for the 60% clearance zone i guess.

http://www.radiofresnel.com/

Now just click "Get kml" and download the file.

If you do not have Google Earth download that.  Google Earth Pro is free.

https://www.google.com/earth/download/gep/agree.html

Load the kml file in Google Earth to see the path.  To manipulate the image with mouse to get the view you desire do the following:

Tilt & Rotate: press the wheel on the mouse and drag to tilt and rotate the view.
Zoom In/Out:  Turn the wheel to zoom in/out.
Pan:  Left button drag pans the view.

Below is an example