atmospheric refraction ( ¦atmə¦sfirik ri′frakshən ) ( geophysics ) The angular difference between the apparent zenith distance of a ... The atmospheric refraction is zero in the zenith,
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and vn (the speed in the air at ground level). Now rn is the apparent zenith distance of the star, z', and i1 is its true zenith distance, z. So sin(z) = (v0 / vn) sin( z').
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NOTE: The Z in Eqn. 1 refers to the apparent zenith distance of a star (i.e., taking into account atmospheric refraction). In physical terms, this distance is ...
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Moon illusion - Wikipedia, the free encyclopedia
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Horizontal coordinate system - Wikipedia, the free encyclopedia
en.wikipedia.org/wiki/Horizontal_coordinate_system
Zenith distance, the distance from directly overhead (i.e. the zenith) is ... In practice the apparent horizon has a negative altitude, whose absolute value gets ... |
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Unlike refraction, even airmass at modest zenith distances still depends on ... nearly always have the apparent (i.e., refracted) zenith distance as argument.
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Behavior at small and moderate zenith distances. Here's the integrand, (tan z)/n, plotted as a function of n, for apparent zenith distances of 30, 40, 50, and 60°.
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The difference between the true (outside earths atmosphere) zenith distance z and the apperant. zenith distance at the telescope is called atmospheric refraction ...
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The quantities to be determined are the apparent zenith distance and the true zenith distance, as seeii from the capsule, denoted by Z~pp and Ztrue, respectively ...
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we find for the apparent (i.e. corrected for parallax and refraction) noon zenith distances, z, of the sun at summer and winter solstices (+130): Summer Solstice: ...
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