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Calculate the value of R.L for staff being vertical and possessing staff readings as follows 2.892, 2.234, 1.926. It being an anallactic lens possesses an instrumental height of 1.94 with R.L 102.34 m. Line of sight placed at an angle of 2042ꞌ.

Calculate the value of R.L for staff being vertical and possessing staff readings as follows 2.892, 2.234, 1.926. It being an anallactic lens possesses an instrumental height of 1.94 with R.L 102.34 m. Line of sight placed at an angle of 2042ꞌ. Correct Answer 106.591 m

The R.L of the staff can be given as R.L = R.L of instrument station + H.I + v – r. the value of v can be calculated as v = k*s/2*sin2θ + c sin θ. On substitution we get, V = 100 * (2.892-1.926)/2* sin (2*2042ꞌ) + 0 V = 4.545 m. R.L of staff is given as R.L = 102.34 + 1.94 + 4.545 – 2.234 = 106.591 m.

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