available on the internet. Also in 1959, a contract to build a larger Wullenweber array — the AN/FLR-9 antenna receiving system — was awarded by the U.S. Air Force to GT&E Sylvania Electronics Systems (now General Dynamics Mission Systems). The first FLR-9 was installed at RAF Chicksands () in the United Kingdom in 1962. The second FLR-9 was installed at San Vito dei Normanni Air Station (), Italy also in 1962. Following base closures, the arrays at Chicksands and San Vito were dismantled in 1996 and 1993, respectively. A second contract was awarded to Sylvania to install AN/FLR-9 systems at Misawa AB, Japan; Clark AB, Philippine Islands; Pakistan (never built); Elmendorf AFB, Alaska; and Karamürsel AS, Turkey. The last two were completed in 1966. The Karamürsel AS was closed and array was dismantled in 1977 in retribution for the suspension of U.S. military aid to Turkey. The Clark AB array was decommissioned after the Mt. Pinatubo volcano eruption in 1991. It was later converted into an outdoor amphitheater. Demolition of the Misawa FLR-9 began in October 2014. A pair of FRD-10s not equipped for HF/DF were installed in 1969 at NAVRADSTA(R) Sugar Grove, WV (), for naval HF communications, replacing the NSS receiver site at the Naval Communications Station in Cheltenham, Maryland. The Elmendorf array was decommissioned in May 2016 due to its age and unavailable repair parts. The U.S. Army awarded a contract in 1968 to F&M Systems to build AN/FLR-9 systems for USASA Field Station Augsburg, Germany, and Ramasun Station in Udon Thani, Thailand (). Both were installed in 1970. The Ramasun Station array was dismantled in 1975 following base closure. During the 1970s, the Japanese government installed two large Wullenweber arrays, similar to the FRD-10, at Chitose and Miho. Surviving arrays and replacements The last two FRD-10 HF/DF arrays were installed in 1971 for the Canadian Forces in Gander, Newfoundland () and Masset, British Columbia (). After the Hanza array was decommissioned in 2006, the Canadian Armed Forces became the operators of one of the last two existing FRD-10 arrays. Later in the 1970s, Plessey (now Roke Manor Research Limited) of the United Kingdom developed the smaller, more economical Pusher CDAA array. At least 25 Pusher CDAAs were installed in many countries around the world. Several Pusher arrays were installed in U.S. military facilities, where the array is known as the AN/FRD-13. In 1998 the Augsburg array—located