[strictnein]

This article finally answered a question I've had for a while: how they can do decent triangulation with just two towers.

> "We said that a tower covers a radius around it. In practice, this is sub optimal so that’s not how it’s done.

> Instead, a station is usually split in 3 independent beams of 120 degrees."

So it's not the intersection of two circles anymore, it's the intersection of two arcs, which will likely only have one intersection point, unlike circles.

[mostlyskeptical]

A step beyond that: some can get fairly accurate with a single "tower". We had at minimum 3 BTS on every site, generally at 120 degree spacing but this could vary, but each BTS had multiple antennas and would do some rudimentary triangulation based on signal arrival times to each antenna. We could generally get within a couple of hundred fee.

[mikepurvis]

Sometimes it's split even more: https://www.google.ca/search?q=sector+antenna&tbm=isch