EKO INSTRUMENTS CO., LTD. - Pyranometer MS-80/80S/80U - Instruction Manual Ver. 1
Pg. 30
4. Daily radiant energy
The total daily radiant energy in Joule per meter squared [J/m
2
] is obtained by integrating the solar irradiance over
time. To calculate the total daily radiant energy in Joule per meter square [J/m
2
], multiply the averaged solar
irradiance I [W/m
2
] by the averaging interval period [s]. Then sum-up the total data number [n] of averaged data
points in one day.
Its physical unit is expressed with [J/m
2
] and can be calculated with J = W・S
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