I was speaking more generally with the towers and their range.... there has to be a general idea of how far towers reach IMO
Anyway, like I said, it's a wait and see thing now because we just don't have the ping/tower information.
So, my understanding is that the three sectors of a tower cover different areas(they are calculated in degrees), as noted above in my post. So, you are looking at a pie shape for each sector.
Ideally it's best to have 3 towers, but it can be done with 2--It's just not as precise. (We do have 2 towers on TH's bill)(reference ICell and LCell on her cell records) My understanding, is the first digit references which of the 3 sectors the phone is pinging off of. (1 for the 1st sector, 2 for the 2nd sector, and 3 for the 3rd sector) We know that TH's phone was pining off the 2nd sector because it begins with a 2)
So, for Tower #1, you determine the distance that sector can reach and draw it out on a map, this will determine the coverage area. (Not an easy task and you have to use a formula to do it) (Which I posted in the Cornell Law doc above) I was looking for a program that would do this for me last night because I didn't want to figure it out my hand) What I was able to figure out using the formula was for one of those towers--it was 26.62 kilometers (which can easily translate into miles)
So for Tower #2, you do the same thing.
Then you look for where they intersect. The tricky part with only 2 towers they can intersect at 2 different points--but--with 3, you are almost guaranteed---a really good location.
I'm not good at paint--but I'll give it a try to graphically explain it--why 2 towers can be tricky.