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THE EFFECT OF NON- STANDARD ATMOSPHERIC BEHAVIIORS IN BAGHDAD CITY ON MEASURING DISTANCES BY USING ELECTRONIC DISTANCE MEASUREMENT INSTRUMENTS (E.D.M.I.) | ||
| AL-TAQANI | ||
| Article 1, Volume 24, Issue 2, 2011, Pages 44-57 | ||
| Author | ||
| Abdull-kadir Abdull-hadi Ibrahim | ||
| Abstract | ||
| effect of non-standard atmospheric behaviors such as; change in temperature, change in air pressure, humidity and difference in elevation on measuring distances by using electronic distance measurement instruments such as total station. Then by using meteorological data sheets of Baghdad city (2007), we can derive a model and design it by a computer program and another program (Mat lab 6.5) to calculate the amount of correction on measured distances under these circumstances. The research concludes that the change in the length of measured distance is neglected when measuring short distances but that change increases when the change in temperature, humidity, air pressure and the height above sea level are increased more than the circumstances at which the instrument was made (standard condition ) ,as shown in the instrument guide (user manual ). | ||
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