A trigonometric leveling was employed to determine the elevation of CGY-2022. The instrument was set-up at CGY-2021 and observed that the inclined distance is 1011.02. During measurement it was found out that CGY-2022 is lower that CGY-2021 and that the observed angle was 10°04'01" and elevation of CGY-2021 is 96.12 m. Determine the Earth's curvature and Atmospheric refraction correction with the assumption that height of instrument is equal to the rod reading. Select the correct response: 0.02 0.07 0.20 0.70

A trigonometric leveling was employed to determine the elevation of CGY-2022. The instrument was set-up at CGY-2021 and observed that the inclined distance is 1011.02. During measurement it was found out that CGY-2022 is lower that CGY-2021 and that the observed angle was 10°04'01" and elevation of CGY-2021 is 96.12 m. Determine the Earth's curvature and Atmospheric refraction correction with the assumption that height of instrument is equal to the rod reading. Select the correct response: 0.02 0.07 0.20 0.70

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Find out the deflection angles from the following observations Lines AB BC Bearing N 42° 20' E N 30° 00'E 72°20'R 12°20'L 12°20'R 72°20'L 72°40'L
Compute the adjusted deflection angle at station D as shown. Station Deflection Angles A 30 26' 00" L В 66° 02'30" L C 119 32' 00" L D 57 28' 00" R E 109° 15' 30" L F 17 52' 00" R 110° 00' 30" L
Note:hand written solution should be avoided.
Solve the problem.
The following data were obtained by stadia observation: vertical angle, +12⁰30’; upper stadia hair reading and lower stadia hair readings, 4.500 and 3.250 m, respectively. The rod reading was taken at 3.875 m above the stadia point at A and the height of instrument above the instrument station, B, is 1.620 m. The stadia interval factor is 99.5 and the instrument constant is 0.381 m. Compute the difference in elevation between the two ground points. (Type your answer using 3 decimal places, numerical value only, no need to include the units)
If the rod reading taken at 1 is 2.735 m, the elevation of 2 is 225.395 m, the difference in elevation between stations 1 and 2 is 25.650m and the difference in elevation between the instrument station and station 2 is 33.642m, determine the following: a. Height of the instrument. b. Horizontal distance between stations 1and 2.
In trying to minimise errors that come with using a tape in linear measurements, Mapalo suggested to the class that an EDM be used to compute the distance from BM1 to point A. A distance of 2122.241m was measured. Given that a frequency of 1.4985MHz was used, speed of light c = 299792458m/s, the refraction index of 1.0003 and that the effective wavelength measures to a centimetre, determine the phase measurement (i.e. Phase Distance and the corresponding Phase angle)
In tacheometry survey, an intercept of 0.755m was recorded on a staff which was believed to vertical, and the vertical angle measured on the theodolite was +15º. Actually, the staff which was 4 metres long was 0.14m out of plumb bob and leaning backwards away from the instrument position. Assuming it was an anallatic instrument with a multiplying constant of 100, what would have been the error in the computed horizontal distance?
topic: Tacheometry Please draw a diagram based on this Problem. (a) diagram of the problem (b) diagram with the computed unknown variables
Q#2: An open traverse survey using theodolite has been carried out and following deflection angles were observed: Stations Observed Deflection Angles α Designation of Deflection Angle A 280 25’ 00’ (L) B 680 03’ 30’’ (L) C 1200 34’ 00’’ (L) D 580 30’ 00’’ (R) E 1080 13’ 30’’ (L) F 160 50’ 00’’ (R) G 1100 00’ 30’’ (L) Compute error of closure in above deflection angles. Find out the adjusted deflection angles using computed error in part (a).
EDM 1) A line was measured by EDM found 4032.32 m, what is the probable error in this distance if the EDM precision is + (2 mm+3 ppm)? 2) The modulation frequency of a red laser beam (A=0.6328 µm) is 24 MHz. This beam travels through the atmosphere, the temperature of which is 26°C and the atmospheric pressure 1011.92 hPa. What is the modulated wavelength of the light? (Answer 2=12.4879 m) 3) A slope distance of 204.834 m was determined by EDM, the instrument and prism having been set up 1.645 m and 1.873 m respectively above their stations. The altitude angle between the stations was later measured as 2°17'40", the instrument station being the higher on the two. Calculate the horizontal length of the line. (Answer 204.679 m)
pls answer asap