A treatise on surveying and navigation: uniting the theoretical, practical, and educational features of these subjects (1857)
Robinson, Horatio N[elson], 1806-1867. [from old catalog] · Cincinnati, J. Ernst; Toledo, Anderson, Burr, & co. · leaf 237
ENDIX. Let ZSm represent the observed triangle.The observed center of the sun or star is atS, but the center really is at S. The ob-served center of the moon is at m, the realcenter i at m, as seen from the center of theearth. S m! is the apparent distance, but thetrue distance is S?n. Let S= the… … cos.Z=- (i) cos.S cos.m In this problem the angle Z is always a constant quantity, Sand m are variable, and x varies in consequence of the variationsof S and m. But we may take these effects separately. Thatis, by supposing m only to vary, anol discover the correspondingvariation for x. Then we may…
Surveying · Navigation
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