NWS Daily Climatology Data: 1981 (SNF)

Weather data were collected by the National Weather Service in International Falls, Minnesota. International Falls is about 80 miles from the SNF, but the weather data is representative of the area. Total solar insolation measurements were made at Fall Lake Dam in Winton, Minn. by Prof. Donald Baker of the Department of Soil Science at the University of Minnesota, St. Paul. Insolation values were measured using a Yellow Springs solar cell calibrated against an Eppley Pyranometer.

气象数据由美国国家气象局（National Weather Service）采集自明尼苏达州国际瀑布城。该市距离SNF约80英里，但其采集的气象数据可代表该区域的气候特征。总太阳辐照度测量工作由明尼苏达大学圣保罗分校土壤科学系唐纳德·贝克教授完成，测量地点位于明尼苏达州温顿的福尔斯湖大坝（Fall Lake Dam）。辐照度数值通过黄斯普林斯太阳能电池（Yellow Springs solar cell）测得，该设备经埃普利总辐射表（Eppley Pyranometer）校准。