A theodolite is an instrument that measures horizontal and vertical angular orientations of a line of sight. The line of sight may be established optically, or by laser, and many forms of theodolite are used in surveying, construction, astronomy, and manufacturing. A simple optical theodolite is shown. After the instrument is aligned so that its base is in a horizontal plane and a desired reference direction is selected (such as perhaps north in the case of a surveying instrument), the telescopic sight is used to establish a line of sight, and then horizontal and vertical angles Thetah and Thetav are measured. If Thetah = 30° and and Thetav = 60°, determine the following: 7.1 The coordinate direction angle Alpha of the line of sight is Blank 1°. 7.2 The coordinate direction angle Beta of the line of sight is Blank 2°. 7.3 The coordinate direction angle Gamma of the line of sight is Blank 3°.
A theodolite is an instrument that measures horizontal and vertical angular orientations of a line of sight. The line of sight may be established optically, or by laser, and many forms of theodolite are used in surveying, construction, astronomy, and manufacturing. A simple optical theodolite is shown. After the instrument is aligned so that its base is in a horizontal plane and a desired reference direction is selected (such as perhaps north in the case of a surveying instrument), the telescopic sight is used to establish a line of sight, and then horizontal and vertical angles Thetah and Thetav are measured. If Thetah = 30° and and Thetav = 60°, determine the following:
7.1 The coordinate direction angle Alpha of the line of sight is Blank 1°.
7.2 The coordinate direction angle Beta of the line of sight is Blank 2°.
7.3 The coordinate direction angle Gamma of the line of sight is Blank 3°.
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