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  2. Nadir - Wikipedia

    en.wikipedia.org/wiki/Nadir

    Nadir also refers to the downward-facing viewing geometry of an orbiting satellite, [2] such as is employed during remote sensing of the atmosphere, as well as when an astronaut faces the Earth while performing a spacewalk. A nadir image is a satellite image or aerial photo of the Earth taken vertically.

  3. Nadir (topography) - Wikipedia

    en.wikipedia.org/wiki/Nadir_(topography)

    In topography, a nadir is a point on a surface that is lower in elevation than all points immediately adjacent to it. [1] Mathematically , a nadir is a local minimum of elevation. A nadir may be the lowest point of a dry basin or depression , or the deepest point of a body of water or ice .

  4. Zenith - Wikipedia

    en.wikipedia.org/wiki/Zenith

    The astronomical meridian is also determined by the zenith, and is defined as a circle on the celestial sphere that passes through the zenith, nadir, and the celestial poles. A zenith telescope is a type of telescope designed to point straight up at or near the zenith, and used for precision measurement of star positions, to simplify telescope ...

  5. Side looking airborne radar - Wikipedia

    en.wikipedia.org/wiki/Side_looking_airborne_radar

    Definition of angles in the vertical plane of SLAR Geometry of an SLAR SLAR radar at ILA Berlin Air Show. Side-looking airborne radar (SLAR) is an aircraft, [1] or satellite-mounted imaging radar pointing perpendicular to the direction of flight (hence side-looking). [2] A squinted (nonperpendicular) mode is also possible.

  6. File:Nadir Viewing Geometry.svg - Wikipedia

    en.wikipedia.org/.../File:Nadir_Viewing_Geometry.svg

    Date/Time Thumbnail Dimensions User Comment; current: 16:08, 28 July 2024: 512 × 371 (4 KB): Sertion: Clean up artifacts from the trace: 05:24, 9 January 2016: 469 × 339 (19 KB): PlanetUser

  7. Mathematics education in the United States - Wikipedia

    en.wikipedia.org/wiki/Mathematics_education_in...

    The American high-school geometry curriculum was eventually codified in 1912 and developed a distinctive American style of geometric demonstration for such courses, known as "two-column" proofs. [49] This remains largely true today, with Geometry as a proof-based high-school math class.

  8. Nadir (disambiguation) - Wikipedia

    en.wikipedia.org/wiki/Nadir_(disambiguation)

    The nadir is a low or downward point of reference. Nadir may also refer to: Nadir (name), a surname and given name; Nadir (topography), a point of lowest local elevation; Nadir (astronomy), the point directly underneath a celestial observer; Nadir (web portal), a German web portal; Nadir, U.S. Virgin Islands, a settlement

  9. Outline of geometry - Wikipedia

    en.wikipedia.org/wiki/Outline_of_geometry

    Geometry is a branch of mathematics concerned with questions of shape, size, relative position of figures, and the properties of space. Geometry is one of the oldest mathematical sciences. Geometry is one of the oldest mathematical sciences.