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TRUE POLE ALIGNMENT of an
i) Centre a star near the meridian and set your filar micrometer to measure dec. drifts.
ii) Follow star for about 2hrs. & measure dec. drift.
iii) Compare the averaged hourly rate to the theoretical rate.
iv) The difference in hourly rate is caused by the elevation of the hour axis deviating from the true pole.
This process can be rather tedious. The determination of the elevation of the hour axis from the true pole may be simplified by preparing two plots beforehand, one of