Mｅａｓｕｒｅｍｅｎｔ ｏｆ ｔｈｅ Ｓｏｌａｒ Ｅｎｅｒｇｙ ａｔ Ｋｉｔａｍｉ Ｃｉｔｙ

Measurement of the solar energy at Kitami city were performed with FUNK net radiometer through one year, 14th Nov. 1968 to 13th Nov. 1969. The follwing results were obtained : 1) The solar energies in June, July, August and September were approximately the same values as measured at Tokyo, but those in winter seasons were very small values, because the angle of elevation of the sun decreased excessively at Kitami. 2) I win be enuogh to use the solar water heater in spring, summer and autumn at Kitami. 3) To utilize the solar energy throughout the year, efficient water heaters have to be designed based on these obtained data