The original Joint Surveillance System (JSS) plans for Gibbsboro AFS, NJ, called for the site to be replaced by the FAA long-range radar site at Trevose, PA (located just north of Philadelphia, next to the US Rte 1 interchange with the PA Turnpike). The problem was, an environmental study discovered that the beam from an Air Force nodding height-finder radar (AN/FPS-116), to have been installed at Trevose, would have swept too close to existing inhabited buildings. So, the Air Force decided to keep Gibbsboro AFS open after all. During the change-out of the AN/FPS-27 search radar at Gibbsboro AFS, the FAA`s Trevose site was used as a temporary data-tie until an AN/FPS-117 could be installed at Gibbsboro AFS. The AN/FPS-117 radar reportedly had problems, and it was decided to send that radar to Murphy Dome AFS, AK. Again, Trevose was used as a data-tie, and was designated as JSS Site J-61. In the mid 1990`s, the Air Force began replacing the radars at most of its shared CONUS radar sites with the new ARSR-4 long-range 3-D radar (designated also as AN/FPS-130). Gibbsboro AFS received one of these new ARSR-4 radars, and the data-tie with Trevose was subsequently terminated. Once the ARSR-4 at Gibbsboro was fully certified by the FAA, the Trevose site was closed. The Trevose FAA site (which originally operated an ARSR-1, and later an ARSR-60) was located at latitude 40°08`04"N and longitude 74°59`13.5"W. It may be viewed in satellite imagery at URL: http://terraserver-usa.com/image.aspx?S=10&T=1&X=2505&Y=22213&Z=18&W=2