data from satellites in polar orbit. At Platåberget above Hotellneset, it was built as a cooperation between NASA and the Norwegian Space Centre, but has since 2001 been operated by Kongsberg Satellite Services. EISCAT operates an incoherent scatter radar to study the northern lights. The Svalbard Global Seed Vault, administered by the Global Crop Diversity Trust, is a secure underground facility capable of storing millions of crop seeds. The facility has been designed to protect against natural and human disasters, including global warming, floods and fires and nuclear holocaust. The site was chosen for a number of factors including its remoteness, sound geology and the ambient temperature of the permafrost. Longyearbyen is the centre of tourism on the archipelago, although most tourism is generated based on natural experiences rather than visiting the town itself. However, Longyearbyen does provide supplies (including Svalbardbutikken, the area's only grocery store), accommodation and several museums. In 2008, Longyearbyen experienced 89,000 guest-nights, up from 30,000 in 1995. The average guest stayed 2.2 nights and 60 percent of the capacity was used by tourists. About 40,000 tourists flew into Longyearbyen. Two-thirds of the tourists come from Norway. In 2007, the tourism industry had a revenue of NOK 291 million and produced 200-man-years. The Svalbard society received NOK 380 million in public funding in 2008, which increased to 650 million in 2015. Education Longyearbyen School serves ages 6–18. It is the primary and secondary school in the northernmost town on earth. Once pupils reach ages 16 or 17 many families move to mainland Norway. There is a non-degree-offering tertiary educational institution in Longyearbyen, University Centre in Svalbard (UNIS), co-located with the Norwegian Polar Institute, Svalbard Museum, Svalbard Science Forum. The Czech Arctic Research Station is also based in Longyearbyen and provides facilities for researchers and students not only from the Czech Republic but from all over the world. Transport Longyearbyen has a road network stretching , but the network does not extend to any other communities. In 2008 there were 1,481 registered road vehicles and 49 percent of all households had a car. Cars are registered with ZN registration plates. There is a single dealer who sells Toyotas, Svalbard Auto, which is also one of two businesses providing repairs. Snowmobiles are a popular mode of transport, and there are more snowmobiles than residents. In 2008, there were registered 2,672 snowmobiles, and 69 percent of households owned at least