Except for the UAPs flying into and out of the mesa. That seems to be a busy area.
That's where the UAP I&IIBD Skinwalker
©️™️®️ location (Intergalactic & Interstellar Intransit Beverage Depot Skinwalker
©️™️®️) is.
That 1.62ghz signal is the ToGo Order Line. When The Team starts sending up rockets and drones through the Triangle it increases the Pilots and Passengers extreme levels of stress having to evade them and the signal is turned ON. They turn it OFF when restocking the inventory.