In Situ Measurement of Solar Radiation over the Sea South of Japan

Abstract

In situ measurement of the solar radiation was made during 166 days from August 1989 to January 1990 over the sea south of Japan, by using a small-sized pyranometer which was attached to the moored surface buoy system. In this prompt report, the daily mean values during 135 days from August to December 1989 were reported and the monthly mean values were compared with the available data which were mostly estimated by other authors using the various empirical formulae for the experimental area.