Solar constant
Solar constant is the average amount of solar radiation that reaches the earth's upper atmosphere on a surface perpendicular to the sun's rays.
It is equal to 1353 Watts per square meter or 492 Btu per square foot.
Solar constant is the average amount of solar radiation that reaches the earth's upper atmosphere on a surface perpendicular to the sun's rays.
It is equal to 1353 Watts per square meter or 492 Btu per square foot.