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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)?

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)?

Materials Science And Engineering Properties
Materials Science And Engineering Properties
1st Edition
ISBN:9781111988609
Author:Charles Gilmore
Publisher:Charles Gilmore
Chapter15: Experimental Methods
Section: Chapter Questions
Problem 20CQ
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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)
Transcribed Image Text: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)
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