Interiorly Based Reduction Tacheometer,
ARMY FOREIGN SCIENCE AND TECHNOLOGY CENTER CHARLOTTESVILLE VA
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The interiorly based reduction geodetic tacheometer TV combines an optical 30-second theodolite and a coincidence rangefinder. The tacheometer is designed for measuring horizontal spans from 2 to 180 m with angles of inclination of plus or minus 45 degrees. Distances to 60 m can be measured as far as almost inaccessible and inaccessible points without resorting to setting up a measured line of a graduated rangefinding pole on the opposite end. Distances of more than 60 m are measured by using a small 0.6 m graduated rangefinder pole, which is part of the tacheometer set. The design and construction of a rangefinder makes it possible to measure horizontal spans of lines, inclined at an angle of up to 90 degrees, but the accuracy of measurement here is reduced. Experimental models of tacheometers were tested in field and laboratory conditions. After some modification, a high-performance geodetic instrument was produced, which was reliably accurate, and simple to use.
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