New user here. I was wondering how much of the antenna would need to visible in line of sight. The reason I ask is I use CalTopo for all of my off-road mapping and navigation. It’s a very powerful program that I barely scratch the surface of, but it is capable of running viewshed analysis. In short, you choose a location, set an “eye level” height, and the program shades everything that is visible from that point. There’s a repeater near where I’ll be camping soon and I wanted to run the viewshed to see where I’d be able to ping the antenna (if need be). So my question is what “eye height” should I use? Let’s say the antenna in question is 100’. How much of the antenna would need to be visible to successfully receive?