The Solar Constant Is Measured At What Altitude

Cosine of solar zenith angle.

The solar constant is measured at what altitude.

The total solar intensity was 136 1 milliwatts per square centimeter or 1 952 calories per square centimeter per minute about 2 5 percent less than johnson s derived value. Must be measured at aphelion. Then your difference is. The value of the constant is approximately 1 366 kilowatts per square metre.

Elevation is measured in degrees up from the horizon. Az el both report dark after astronomical twilight. Azimuth is measured in degrees clockwise from north. The interaction of the solar wind and upper layers of earth s atmosphere.

Global and direct uv irradiance spectra were measured under a cloudless sky at varying solar elevations at inns bruck 577 m a s l and hafelekar 2300 m a s l from january to march 1992. Energy in the ultraviolet and visible regions for λ less than 607 nanometers was 7 0 percent. Solar constant the total radiation energy received from the sun per unit of time per unit of area on a theoretical surface perpendicular to the sun s rays and at earth s mean distance from the sun. Is about 0 5 calories per square centimeter per minute.

Must be measured at perihelion. The solar constant is measured at. The angular height of the sun above the horizon. The solar constant was directly measured from an altitude of about 82 kilometers apparently the first such determination.

After correcting the readings for the remaining 1 of the atmosphere and earth sun distance a value of 1 912 gm cal cm 2 min has been determined for the solar constant. Your solar constant 1376 1376 100 include your sign. Solar constant irradiation 2 1 4 j s m2 the accepted value of the solar constant is about 1376 w m2. Refers to the intensity of solar radiation that actually reaches earth s surface.

It is measured on a surface perpendicular to the rays one astronomical unit from the sun. The sun s altitude refers to. Earth s solar constant a. The solar constant has been measured by the use of eppley normal incidence pyrhelio meters on three different days at 31 kilometers altitude.

It is most accurately measured from satellites where atmospheric effects are absent. Multiply your uncorrected solar irradiation by 2 to correct for the glass and also by 1 4 to correct for the atmosphere. The spectra were measured with the bentham spectrometer. The solar constant is a flux density measuring mean solar electromagnetic radiation per unit area.