Before revision: Platteville Atmospheric Observatory (has stopped ionospheric heater research but still operates as an atmospheric observatory) SPEAR (Space Plasma Exploration by Active Radar) is an installation operated by UNIS (the University Centre in Svalbard) adjacent to the EISCAT facilities at Longyearbyen in Svalbard, capable of transmitting 192 kW or 28 MW ERP.
After revision: Islote ionospheric heater, operated until 1998, located in IslotePlatteville Atmospheric Observatory (has stopped ionospheric heater research but still operates as an atmospheric observatory) SPEAR (Space Plasma Exploration by Active Radar) is an installation operated by UNIS (the University Centre in Svalbard) adjacent to the EISCAT facilities at Longyearbyen in Svalbard, capable of transmitting 192 kW or 28 MW ERP.