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2. Sector antenna - Wikipedia

   en.wikipedia.org/wiki/Sector_antenna

   Typical GSM sector antenna outdoor unit. A sector antenna is a type of directional microwave antenna with a sector-shaped radiation pattern.The word "sector" is used in the geometric sense; some portion of the circumference of a circle measured in degrees of arc. 60°, 90° and 120° designs are typical, often with a few degrees 'extra' to ensure overlap and mounted in multiples when wider or ...

3. PSO-1 - Wikipedia

   en.wikipedia.org/wiki/PSO-1

   The telescopic sight proprietary mount is adjustable for tension on the SVD rifle's side rail scope mount. This side rail is a type of dovetail rail known as the Warsaw Pact rail, which has cut-out portions to reduce weight and allow easier installation. The side rail mount is an offset mounting that positions the PSO-1 telescopic sight axis to ...

4. List of telescope parts and construction - Wikipedia

   en.wikipedia.org/wiki/List_of_telescope_parts...

   Focuser: Allows the user to adjust the focus by moving the eyepiece along the optical axis. Eyepiece : Performs the final focus correction before the light reaches the eye. Charge-coupled device (CCD) : A light-sensitive integrated circuit digital sensor (commonly used in digital cameras) that turns light into an electrical charge used to ...

5. Telescope mount - Wikipedia

   en.wikipedia.org/wiki/Telescope_mount

   Alt-alt mounts, or altitude-altitude mounts, are designs similar to horizontal equatorial yoke mounts or Cardan suspension gimbals. This mount is an alternative to the altazimuth mount that has the advantage of not having a blind spot near the zenith, and for objects near the celestial equator the field rotation is minimized. [7]

6. Equatorial mount - Wikipedia

   en.wikipedia.org/wiki/Equatorial_mount

   In the German equatorial mount, [4] (sometimes called a "GEM" for short) the primary structure is a T-shape, where the lower bar is the right ascension axis (lower diagonal axis in image), and the upper bar is the declination axis (upper diagonal axis in image). The mount was developed by Joseph von Fraunhofer for the Great Dorpat Refractor [5 ...

7. News, Politics, Sports, Mail & Latest Headlines - AOL.com

   homepage.aol.com

   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.

8. Telescopic sight - Wikipedia

   en.wikipedia.org/wiki/Telescopic_sight

   A typical sight mounting system consists of two parts, the scope rings and the scope base. The mounting generally positions the telescopic sight axis without cant over the receiver and bore center axis, to make sighting in and the use of ballistic tracking at various ranges for the user as easy as possible.

9. Polar mount - Wikipedia

   en.wikipedia.org/wiki/Polar_mount

   A polar mount is a movable mount for satellite dishes that allows the dish to be pointed at many geostationary satellites by slewing around one axis. [1] It works by having its slewing axis parallel, or almost parallel, to the Earth's polar axis so that the attached dish can follow, approximately, the geostationary orbit, which lies in the plane of the Earth's equator.