Horizontal Collimation?
1)What is is meant by the term, horizontal collimation, when applied to a total station?
2)Explain how horizontal collimation error is determined?
3)How is horizontal collimation error reduced in practice?
4)The phase comparison method is a method used to compute distance electronically in most total stations. Explain what is meant by this phrase and show how a distance is determined with this method?
Thanks
Answer:
1) Horizontal collimation is the procedure with which the error of horizontal angles measured at two faces is minimized. It's the same as applied to a theodolite
2 First you must have the primary axis vertical, aim at a distant target at phase I, aim the same target at phase II and then correct the plum so that the result is the same.
3) Finding the mean value of the two faces reduces the error
4) Each wave has a phase when emmited from the total station. The radiation is reflected back to the instruments. The difference at the phase is then calculated and then the distance
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