Solar Radiation Calculation Guide
• Solar Constant, Gsc: is the amount of solar
radiation, at the mean distance of the earth
from the sun, received on a unit area of a
surface normal to the sun, outside the
atmosphere, Gsc = 1366.1
• The Extraterrestrial Radiation measured on
the plane normal to the radiation on the Nth
day of the year, Gon, can be calculated by:
,* The rate of solar radiation, incident on a extra -
terrestrial horizontal surface is given by:
, Solar Radiation
• The total radiation, Ho, incident on an extra
terrestrial horizontal surface during a day can
be obtained by the integration of the last Eq.
over a period from sunrise to sunset. The
resulting equation is:
• Solar Constant, Gsc: is the amount of solar
radiation, at the mean distance of the earth
from the sun, received on a unit area of a
surface normal to the sun, outside the
atmosphere, Gsc = 1366.1
• The Extraterrestrial Radiation measured on
the plane normal to the radiation on the Nth
day of the year, Gon, can be calculated by:
,* The rate of solar radiation, incident on a extra -
terrestrial horizontal surface is given by:
, Solar Radiation
• The total radiation, Ho, incident on an extra
terrestrial horizontal surface during a day can
be obtained by the integration of the last Eq.
over a period from sunrise to sunset. The
resulting equation is:
