So, I used the Hawking Radiation theory, the theory that black-body radiation is released by black holes because of quantum effects near the black hole event horizon, because Selvig was able to confirm some similarities between multidimensional portal gateways and black holes.
But the readings were way off, and it took me forever to adjust everything to account for the fact that there's a literal radon canyon just west of town that produced enough interference that I basically had to reprogram my equipment to accommodate it.
But now, we'll have some idea of when a portal will open, and where. There's a few cluster spaces that get a lot of portal activity too, so they might be easy to keep track of to a degree