Troll is a research station located at Jutulsessen, 235km from the coast in the eastern part of Princess Martha Coast in Queen Maud Land, Antarctica. It is Norway's only all-year research station in Antarctica, and is supplemented by the summer-only station Tor. Troll is operated by the Norwegian Polar Institute and also features facilities for the Norwegian Meteorological Institute, the Norwegian Institute for Air Research.Contrary to most other research stations on the continent, Troll is constructed on the snow-free slope of solid rock breaking through the ice sheet at Jutulsessen, located 1275m above mean sea level. The station opened as a summer-only station in 1990 and was taken into use as an all-year station in 2005. It has an overwintering capacity of eight people and a summer capacity of 40. It is served by Troll Airfield, which is the base for the Dronning Maud Land Air Network.FacilitiesTroll is located in the eastern part of Princess Martha Coast in Queen Maud Land, which Norway claims as a dependent territory. The station is located on the nunatak bare ground area Jutulsessen, at 1270m above mean sea level. It is completely surrounded by the Antarctic ice sheet. This is unlike most other Antarctic research stations, which are located on snow. Troll is 235km from the coast.