Merriman, Mansfield, 1848-1925 · New York Wiley · leaf 118
or the-^tI arc NP. Let 6 be the declinationof the sun or the arc QS. Thenin the spherical triangle PZS, thethree sides are known, and hencethe angle Z can be round from theequation of spherical trigonometry sincJ = cos^ sin0 -|~ sin^ cos0 cosZ. For accuracy of computation, it is best to put this… … 42. AZIMUTH BY AN ALTITUDE OF THE SUN. II5 tant.^ - y ^^31^^ - 0 - ^J) sini(^ _ ^ + ^y) V4ij from which -Z is to be computed. In the figure 5 denotesthe place of the sun in the summer half-year when d is posi-tive, and S its place in the winter half-year when ^ is nega-tive. If the observation is…
Geodesy · Surveying
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