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It is done for each independent observation to bring the image of the object in the plane of cross hairs. It includes following steps of operation: First, direct the telescope towards the object for observation. Next, turn the focusing screw until the image of the object appears clear and sharp as the observer looks through properly focused eye ...
Horizontal axis adjustment. The horizontal axis must be perpendicular to the vertical axis. Vertical circle index adjustment. The vertical circle must read zero when the line of collimation is horizontal. Adjustment of altitude level. The axis of altitude level must be parallel to the line of collimation. Collimation adjustment.
Photogrammetric block adjustment of stereo pairs of aerial photographs is a modern, three-dimensional variant. In the late 1780s, Jesse Ramsden , a Yorkshireman from Halifax , England who had developed the dividing engine for dividing angular scales accurately to within a second of arc (≈ 0.0048 mrad or 4.8 μrad), was commissioned to build a ...
Soaking your shower head in vinegar overnight. Grandma isn't completely wrong here. However, we'd like to offer a modification to the process of cleaning your shower head with vinegar.
Like many others who found themselves working remotely, Linette Miller, 59, noticed that she had become sedentary. “It suddenly dawned on me how little activity I get every day,” Miller, from ...
Valerie Bertinelli is celebrating two years of personal growth.. The Food Network, 64, alum finalized her divorce from ex-husband Tom Vitale on Nov. 22, 2022. “Today marks two years of freedom ...
The axes and circles of a theodolite Points in the polar coordinate system with pole O and polar axis L.In green, the point with radial coordinate 3 and angular coordinate 60 degrees or (3,60°).
Aircraft flight mechanics are relevant to fixed wing (gliders, aeroplanes) and rotary wing (helicopters) aircraft.An aeroplane (airplane in US usage), is defined in ICAO Document 9110 as, "a power-driven heavier than air aircraft, deriving its lift chiefly from aerodynamic reactions on surface which remain fixed under given conditions of flight".