• Enter up to four different transmitter locations.
• Don't enter the minus (-) sign on longitude data.
• K Factor of 1.0 is the true Earth radius, K Factor of Infinity is a flat Earth.
• Press Submit to see an example.
• It takes about 10 minutes, per location, for the plotting to complete.  Decrease Coverage Radius for faster plotting.
• Don't hit Stop half way through the process.
• Available elevation coordinates.