HsSP data used by Reistad, M., Breivik, <U+00D8>., Haakenstad, H., Aarnes,
O. J., Furevik, B. R., and Bidlot, J.-R. (2011), A high-resolution hindcast
of wind and waves for the North Sea, the Norwegian Sea, and the Barents
Sea, J. Geophys. Res., 116:1-18.