This was true for many years, not sure if it still is. I know they were trying to find a new observer at one point. I live in National Park (no I’m not the observer). The western part of our town is just the river’s width away from PHL. We are probably quite representative of ground truth on the eastern part of airport property but from what I remember there was no suitable location on that part of the airport. It often differs from some of the unofficial obj in center city, but generally what I experienced at my location jives pretty nicely with the airport. I think there was one storm that the back edge of a band we were in never made it across the river. I’m frequently not in town or I mighta done the obs and don’t trust others to faithfully follow the measurement protocols. I’ve still never come across who the observer was from my town. Lol y’all probably sent the person into observer witness protection.