paraboloid aerial

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• parabolic aerial — /pærəˌbɒlɪk ˈɛəriəl/ (say paruh.bolik airreeuhl) noun an aerial used especially in radar and radio telescopes, consisting of a large concave mirror the reflective surface of which has the shape of a paraboloid …  

• Conical scanning — is a system used in early radar units to improve their accuracy, as well as making it easier to steer the antenna properly to point at a target. Conical scanning is similar in concept to the earlier lobe switching concept used on some of the… …   Wikipedia

• photography, technology of — Introduction       equipment, techniques, and processes used in the production of photographs.  The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …   Universalium

• Ordnance Survey — Welsh: Arolwg Ordnans Non ministerial government department overview Formed 1791 ( …   Wikipedia

• List of World War II British naval radar — This page is a List of World War II British naval radar.NomenclatureThese sets were initially numbered as wireless telegraph (w/t) sets, but a distinguishing prefix of 2 was soon added. Metric sets were numbered in the 28x and 29x series. When… …   Wikipedia

• Dish — (d[i^]sh), n. [AS. disc, L. discus dish, disc, quoit, fr. Gr. di skos quoit, fr. dikei^n to throw. Cf. {Dais}, {Desk}, {Disc}, {Discus}.] 1. A vessel, as a platter, a plate, a bowl, used for serving up food at the table. [1913 Webster] She… …   The Collaborative International Dictionary of English

• dish antenna — Dish Dish (d[i^]sh), n. [AS. disc, L. discus dish, disc, quoit, fr. Gr. di skos quoit, fr. dikei^n to throw. Cf. {Dais}, {Desk}, {Disc}, {Discus}.] 1. A vessel, as a platter, a plate, a bowl, used for serving up food at the table. [1913 Webster]… …   The Collaborative International Dictionary of English

• satellite dish — Dish Dish (d[i^]sh), n. [AS. disc, L. discus dish, disc, quoit, fr. Gr. di skos quoit, fr. dikei^n to throw. Cf. {Dais}, {Desk}, {Disc}, {Discus}.] 1. A vessel, as a platter, a plate, a bowl, used for serving up food at the table. [1913 Webster]… …   The Collaborative International Dictionary of English

• Impact crater — The prominent impact crater Tycho on the Moon. In the broadest sense, the term impact crater can be applied to any depression, natural or manmade, resulting from the high velocity impact of a projectile with a larger body. In most common usage,… …   Wikipedia

• Moses Lake, Washington —   City   Aerial view of Moses Lake Potholes Reservoir …   Wikipedia

• University of Birmingham — Infobox University name = University of Birmingham image size = 234px motto = la. Per Ardua Ad Alta mottoeng = Through hard work, great heights are achieved established = 1825, with Royal Charter granted in 1900 city = Birmingham state = West… …   Wikipedia