Compute the refraction error for a distance 1936.7 m.
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- A stadia measurement was undertaken with a theodolite having an internal focusing telescope and a stadia interval factor of 98.8. when a backsight was taken on a turning point whose elevation is 205.62m, the rod interval observed was 1.94m; and with the horizontal hairs set at 1.50m on the rod, the vertical angle reading was -13 45’. For a foresight to a control point, the rod intercept was 1.17m; and with the horizontal hair reading of 1.60m on the rod, the vertical angle observed was -15 30’. Determine the elevation of the line of sight at the instrument point and the elevation of the point on which the foresight was taken. SKETCH THE PROFILE PLEASEA stadia measurement was undertaken with a theodolite having an internal focusing telescope and a stadia interval factor of 98.8. When a backsight was taken on a turning point whose elevation is 205.62m, the rod interval observed was 1.94m; and with the horizontal hairs set at 1.50m on the rod, the vertical angle reading was -13°45'. For a foresight to a control point, the rod intercept was 1.17m; and with the horizontal hair reading of 1.60m on the rod, the vertical angle observed was +7°18'. Determine the elevation of the line of sight at the instrument point and the elevation of the point on which the foresight was taken.The top of a mast signal 2000m away was sighted through a transit with recorded vertical angle of 4 deg. 10 min. the height of the mast is 6m and the HI of the transit above the point where it is set is 1.2m. The elevation of the base of the signal B is 171.17m. Compute the elevation of the point under the transit A with due allowance for curvature and refraction correction.
- A stadia measurement was undertaken with a theodolite having an internalfocusing telescope and stadia interval factor of 98.8. When a backsight was taken on a turning point whose elevation is 205.62 m, the rod interval observed was 1.94m; and with the horizontal hairs set at 1.50 m on the rod, the vertical angle readingwas +13⁰45’. For a foresight to a control point, the rod intercept was 1.17 m; andwith the horizontal hair reading of 1.60 m on the rod, the vertical angle observedwas -7⁰18’. Determine the elevation of the line of sight at the instrument point and the elevation of the point on which the foresight was taken.A stadia measurement was undertaken with a theodolite having an internal focusing telescope and stadia interval factor of 98.8. When a backsight was taken on a turningpoint whose elevation is 205.62 m, the rod interval observed was 1.94 m; and with thehorizontal hairs set at 1.50 m on the rod, the vertical angle reading was +13045’. For a foresight to a control point, the rod intercept was 1.17 m; and with the horizontal hairreading of 1.60 m on the rod, the vertical angle observed was -7018’. Determine the elevation of the line of sight at the instrument point and the elevation of the point on which the foresight was taken.The top of a tower signal at B 2000 m from A away was sighted through a transit with recorded vertical angle of 2deg30’. The height of the mast is 12 m and the HI of the transit above the point where it is set is 1.10 m. The elevation of the point under the transit A is 133.3 m. Compute the elevation of the base of the signal B. Consider the effects of curvature and refraction.
- what is the answer to b. i & ii? The slope distance between twostations A and B measured with EDM when corrected for meteorological conditions and instrument constants,is 113.893 m. Theheights of the instrument and reflector are 1.739 m and 1.839 m, respectively, above the ground. To measure the vertical angle a theodolite was set up at A, 1.665 m above the ground and a target at B having height above the ground as 1.632 m. The measured angle above the horizontal was + 4°22′18″. Determine a. The horizontal length ofthe line AB. b. To what precision the slope angle be measured: if the relative precision of the reduced horizontal distance is to be 1/100000. if the reduced horizontal distance is to have a standard error of ± 1.8 mm.The top of the tower signal at B which is 2km away from A was sighted through a transit with recorded vertical angle of 2o30'. The height of the signal situated on top of the tower is 12m and the height of the transit above the point where it is set is 1.10m. The elevation at A is 133.33m, compute the elevation of the base of the signal considering the effect of earth's curvature and refraction.A stadia measurement was undertaken with a theodolite having an internal focusing telescope and stadia interval factor of 98.8. When a backsight was taken on a turning point whose elevation is 205.62 m, the rod interval observed was 1.94 m; and with the horizontal hairs set at 1.50 m on the rod, the vertical angle reading was -13 degree 45’. For a foresight to a control point, the rod intercept was 1.17 m; and with the horizontal hair reading of 1.60 m on the rod, the vertical angle observed was +7 degree 18’. Determine the elevation of the line of sight at the instrument point and the elevation of the point on which the foresight was taken.
- The upper and lower stadia hair readings on a stadia rod held at station B were observed as 3.50 and 1.00 m, respectively, with the use of a transit with an internal focusing telescope and having a stadia interval factor of 99.5. The height of the instrument above station A is 1.45 m and the rod reading is taken at 2.25 m. If the vertical angle observed is − 23 ∘ 34 ′ , what is the elevation of station B if the elevation of station A is 155.54 m above mean sea level?A transit is set up at point B which is between A and B. The vertical angleobserved towards A is known to be -20° and that of C is + 12°. The horizontal distance between A and B is 642.8m and that of B and C is 1032.40m. The height of instrument is 1.5m above B with A having an elevation of 146.32m. Considering the effect of curvature and refraction correction. a. Compute the difference in elevation between A and B.b. Compute the difference in elevation between A and C.c. Compute the elevation of B.The upper and lower stadia hair readings on a stadia rod held at station B were observedas 3.50 and 1.00m respectively, with the use of a transit with an interval focusingtelescope and having a stadia interval factor of 99.5. The height of the instrument abovestation A is 1.45m and the rod reading is taken at 2.25m. If the vertical angle observed is-23034’, determine the following:a. Inclined stadia distanceb. Difference in elevation between the two stationsc. The elevation of station B, if the elevation of station A is 155.54m above mean sealevel.