The phrase "angle of elevation" is correct and usable in written English.
It is typically used in mathematics and physics to describe the angle formed by a horizontal line and the line of sight to an object above that line.
Example: "To determine the height of the building, we measured the angle of elevation from a distance of 100 meters."
Alternatives: "elevation angle" or "angle of ascent".
Using the angle of elevation methods you can adjust for an angled tree by measuring the distance between you and the point on the ground that lies directly below the tree's top, rather than measuring the distance between you and the base of the tree.
The video footage taken by members of the public in Gukovo showed rockets leaving the launchers, so the investigative team could measure the angle of elevation at which they were fired.
This discovery led scientists to the formula for the range of a cannonball when its muzzle velocity v0 (the speed at which it leaves the cannon) and the angle of elevation A of the cannon are given.
But the most effective interactive display may be the simple sextants pointed at diagrams of stars on the wall, which you can use to determine a star's angle of elevation.
Davis invented a device (called the backstaff, or Davis quadrant) used until the 18th century for determining latitude by reading the angle of elevation of the sun, and he wrote a treatise on navigation, The Seaman's Secret (1594).
An instrument for measuring the altitudes of stars, or their angle of elevation above the horizon, took the form of a graduated arc suspended from a hand-held cord.
This was then converted into an angle by consulting a table, calculated during development of the gun, on which ranges were tabulated against angles of elevation.
Especially for some engineering applications the objects with low angles of elevation must be observed sometimes.
Because of the influence of atmospheric refraction the astronomical observations of the objects with the angles of elevation below 15° are generally avoided, but for the sake of the complete theoretical research the atmospheric refraction under the condition of lower angles of elevation is still worthy to be analyzed and explored.
The guns could be loaded at all angles of elevation and the turrets could traverse 270°.
Information on the vertical angle of arrival (elevation) is crucial in determining propagation modes of high-frequency (HF, 3 30 MHz) radio waves travelling through the ionosphere.
