Copyright © 2011. The solar constant was directly measured from an altitude of about 82 kilometers--apparently the first such determination. Energy terms . Dictionary.com Unabridged (Math.) It is measured on a surface perpendicular to the rays, one astronomical unit (AU) from the Sun (roughly the distance from the Sun to the Earth). The value of the solar constant indicated by 30 years of observation by the Smithsonian Institution is revised in the light of the scale correction announced in 1952 and new solar … [3], The angular diameter of the Earth as seen from the Sun is approximately 1/11,000 radians, meaning the solid angle of the Earth as seen from the sun is approximately 1/140,000,000 steradians. Solar Powered The Instinct Solar comes with an extensive battery life with Garmin’s Power Glass™ solar charging lens. solar constant: translation. solar constant in American English noun the average rate at which radiant energy is received from the sun by the earth, equal to 1.94 small calories per minute per square centimeter of area perpendicular to the sun's rays , measured at a point outside the earth's atmosphere … The People’s Choice 2020 Word Of The Year: 2020 Was A $#@#%%$@! Professor Pringsheim has collected the following table2 of solar- The solar constant is expressed normally as watts per square meter, and its value in this unit is 1,368 w/m2. When measured at the edge of the Earth’s atmosphere with the sun directly overhead, it is 1.35 kilowatts per square meter. Solar Constant | Encyclopedia.com The average amount of solar radiation received by the Earth's atmosphere, per unit area, when the Earth is at its mean distance from the Sun. Constant Con stant, n. 1. A 1903 Langley bolograph with an erroneous solar constant of 2.54 calories/minute/square centimeter. The solar constant, a measure of flux density, is the amount of incoming solar electromagnetic radiation per unit area that would be incident on a plane perpendicular to the rays, at a distance of one astronomical unit (AU) (roughly the mean distance from the Sun to the Earth). Solar Constant: translation The average amount of solar radiation that reaches the earth's upper atmosphere on a surface perpendicular to the sun's rays; equal to 1353 Watts per square meter or 492 Btu per square foot. 97 calories per cm2 in energy units or 1372 watts per m2 in power units. The calorie and derivatives, such as the langley (cal cm-*), are not acceptable. Why Do “Left” And “Right” Mean Liberal And Conservative? By taking readings at different times of day, he attempted to remove effects due to atmospheric absorption. Between 1902 and 1957, measurements by Charles Greeley Abbot and others at various high-altitude sites found values between 1.322 and 1.465 kW/m². Thus the Sun emits about two billion times the amount of radiation that is caught by Earth, in other words about 3.86×1026 watts. [1913 Webster] 2. 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. Its value is about 1.98 calories per minute… “Affect” vs. “Effect”: Use The Correct Word Every Time. 236 ABBOT?SOLAR CONSTANT OF RADIATION. It is equal to 1370 watts per square meter. Abbot showed that one of Langley's corrections was erroneously applied. In 1838, Claude Pouillet made the first estimate of the solar constant. Glass cover is provided on the collector. solar constant. Its value is about 1.98 calories per minute incident on each square centimeter (approximately 127.7 calories incident per minute on each square inch) of the upper atmosphere. Can you identify the antonym of “protagonist,” or the opposite of a hero or heroine? Its value is 1367 watts per square metre. Therefore, the solar constant ranges from 2. In practice, the unit area is 1 m squared (m 2).Its value is about 1.98 calories per minute incident on each square centimeter (approximately 127.7 calories incident per minute on each square inch) of the upper atmosphere. Is the sun providing the same energy to the earth every day, or is it varying? Professor Pringsheim has collected the following table2 of solar- If the solar constant for the earth is 's'. A more technical measurement, taken outside the Earth’s atmosphere and when the Earth is at its mean distance from the Sun, gives a solar constant of 1.94 calories (as a measure of heat) per minute per square centimeter. Over the whole earth the actual amount of radiation is 2.55 × 10 18 calories, or about one-fourth of the product of the solar constant … In practice, the unit area is 1 m squared (m2). A more technical measurement, taken outside the Earth’s atmosphere and when the Earth is at its mean distance from the Sun, gives a solar constant of 1.94 calories (as a measure of heat) per minute per square centimeter. © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins The lens allows you to charge the watch from the power of the sun and comes with various power modes that allow you to further manage your battery life. unit is the joule (J = kg m* s-*). the average solar intensity at ground level. If the solar constant for the earth is 's'. solar constant, the average amount of radiant energy received by the earth's atmosphere from the sun; its value is about 2 calories per min incident on each square centimeter of the upper atmosphere. 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