A treatise on surveying and navigation: uniting the theoretical, the practical, and the educational features of these subjects (1852)
Robinson, Horatio N[elson], 1806-1867. [from old catalog] · Cincinnati, J. Ernst · leaf 234
latitude, a small mistake inobserving or correcting the altitude of a celestial object, will produce thesmallest error in the time computed from it.Let Z be the zenith, P the pole, r the supposed place, and m the true place of the object. Let ms be a parallel of altitude, join the points m and r,… … 230 APPENDIX. altitude, and pq the measure of the required error in time. And as thesides of the triangle msr will necessarily be small, that triangle may beconsidered as a rectilinear one, right angled at s ; and because the anglePrm is also a right angle, the angles smr and PrZ, being each the…
Surveying · Navigation
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