Hi Frankfish, welcome to the group. You will find a lot of help. I only have a little to add to what's been said; one is that VHF signals travel (usually) line of sight from the antenna and that is why taller towers (think FM and TV stations) are for the most part, better. Unlike plain old AM broadcast radio, there should be no difference day or night. Sorry that's probably not much help.
Second, unless I missed it, and corrections will come if I did, I don't think there is a STARS site at Div 1 HQ. Most of the metro area is covered from the big tower at HQ on Midlothian Tpk. It's that huge self-supporter near Buford rd. Look at the list of towers in the database.
Well, good luck and nice to meet ya'