sun angle and solar irradiance

Sun angle refers to the position of the sun in the sky in relation to a specific location on Earth. It is measured as the angle between the horizon and the sun's rays, with 0 degrees being when the sun is directly overhead and 90 degrees being when it is on the horizon. Solar irradiance refers to the amount of solar radiation (energy from the sun) reaching a particular area on Earth's surface. It is a measure of the power per unit area received from the sun, typically expressed in watts per square meter.

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