Lectures on Practical Astronomy and Astronomical Instruments (1879)
Challis, James Rev. · Deighton, Bell and Co. (Cambridge) · leaf 106
Zenith of the place of observation and the Pole of the heavens. Consequently this error is necessarily determined by astrono- mical observation. For the purpose, however, of obtaining formule for calculating azimuth error, it suffices to take for granted that the observer is able to note with… … Zenith of the place of observation, Znn’ the plane of collimation passing through the Zenith, error of level as well as that of colli- mation being supposed to be corrected, and on is the path of a star between the plane of collimation and the plane of the me- ridian. Let Po=8, Zo=z, .¢Zn=x=the…
Book · Astronomy
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