Dear all, I am little bit confusion about solar radiation measurement. We have one automatic weather station of Delta-T make and configured the logger for hourly recording with every 10 minutes sensing and taking the average of 6 reading as the mean of that particular hour. We are getting solar radiation in Wm-2 units. For one day, there will be 24 values. For example, for a particular day 2 pm = 1024 Wm-2. In all models viz., DSSAT, SWAP, SPAW require solar radiation in KJm-2 per day. Here problem is that how the point value of 24 solar radiation values will convert into KJm-2 per day? Kindly please help me. Thank you very much for spending your valuable time for me. Have a nice and good day. Thanking you, With kind regards, Sincerely yours, N. SUBASH Scientist (Agricultural Meteorology) ICAR Research Complex for Eastern Region WALMI Complex, Phulwari Shariff P.O PATNA 801 505, BIHAR Email address : [log in to unmask]