Civil Engineering - Advanced Surveying - Discussion

27. 

Pick up the correct statement from the following :

[A]. Refraction correction is zero when the celestial body is in the zenith
[B]. Refraction correction is 33' when the celestial body is on the horizon
[C]. Refraction correction of celestial bodies depends upon their altitudes
[D]. all the above.

Answer: Option D

Explanation:

No answer description available for this question.

Animesh Adak said: (Apr 29, 2014)  
By which instrument declination is measured ?

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