The nadir (/ ˈ n eɪ d ɪər,-d ər /, also UK: / ˈ n æ d ɪər /; Arabic: نظير, romanized: naẓīr, lit. 'counterpart') is the direction pointing directly below a particular location; that is, it is one of two vertical directions at a specified location, orthogonal to a horizontal flat surface. The direction opposite of the nadir is the zenith

nadir: [noun] the point of the celestial sphere that is directly opposite the zenith and vertically downward from the observer.

What are the IESNA cutoff classifications? The Illuminating Engineering Society of North America (IESNA) defines several outdoor luminaire cutoff classifications, each with different photometric criteria.For these classifications, two relevant zones are defined with respect to the nadir of a luminaire (the nadir is defined as the angle that points directly downward, or 0°, from the …

nadir - In the lighting discipline, nadir is the angle pointing directly downward from the luminaire, or 0°. Nadir is opposite the zenith. noncutoff luminaire - IESNA classification that describes a luminaire light distribution in which there is no candela limitation in the …

Apr 29, 2022 · Doctors may use a variety of laboratory tests if cancer is suspected. In conducting lab tests for cancer, samples of blood, urine, other bodily fluids or tissue are examined for abnormal cells or tumor markers that may determine whether a person has the disease or a precancerous condition. Lab tests also may be used to screen high-risk patients, pinpoint the …

May 03, 2022 · The nadir of Kenseth’s career could be the elephant in the room (figuratively and somewhat literally) when the NASCAR Hall of Fame voting panel meets Wednesday in a conference hall at the ...

Minimum definition, the least quantity or amount possible, assignable, allowable, or the like. See more.

Floor definition, that part of a room, hallway, or the like, that forms its lower enclosing surface and upon which one walks. See more.

Yaw, Pitch, Roll angles define the relation between the navigation coordinate system and the body coordinate system. The coordinate systems and rotations are defined as: Example. ... (i.e. nadir), it means that the top of the image points to the north. If yaw = 90° and the camera is looking nadir, it means that the top of the image points to ...

The nadir (from Arabic نظير nadhir, "opposite") is the direction pointing directly below a particular location; that is, it is one of two vertical directions at a specified location, orthogonal to a horizontal flat surface there. Since the concept of being below is itself somewhat vague, scientists define the nadir in more rigorous terms.