Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 390
ean time = 4 41 38 p.m. LATITUDE BY MERIDIAN OBSERVATION 401 SECTION XXVIIILATITUDE BY MERIDIAN OBSERVATION OF A HEAVENLY BODY Latitude is the angle between the direction of gravity andthe plane of the equator. Hence, to find the latitude we haveto find the distance of the zenith from the equator;… … Fig. 41 QS = d — the declination of the heavenly body. HS = k = the true altitude of the heavenly body. SZ = z — 90° — h — the zenith distance of the heavenlybody. The zenith distance is named N. or S. according asthe zenith is north or south of the heavenly body. PQ = ZH (each being equal to 90°);…
Trigonometry · Surveying · Navigation
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