Using Virtual Radar Server, one can have it build up a coverage map over a short time. There is a box to check and location information that needs to be entered in on the server, but give it a whirl and see your coverage range and altitudes at distances. I only recently stumbled across this feature, as I was previously using Plane Finder to view a plot on a map.
The range rings on my map are at 50 nautical miles. Starting from the inner area the altitude plots in feet are from 0-9.9k, 10k-19.9k, 20k-29.9k, 30k and above. I'm using a DPD Productions outdoor ADS-B antenna that is up about nine meters (30') and uses RG-6 coaxial cable. Yep, 50 feet of RG-6.
Click the thumbnail to enlarge.
The range rings on my map are at 50 nautical miles. Starting from the inner area the altitude plots in feet are from 0-9.9k, 10k-19.9k, 20k-29.9k, 30k and above. I'm using a DPD Productions outdoor ADS-B antenna that is up about nine meters (30') and uses RG-6 coaxial cable. Yep, 50 feet of RG-6.
Click the thumbnail to enlarge.