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Radar beacon. Racon signal as seen on a radar screen. This beacon receives using sidelobe suppression and transmits the letter "Q" in Morse code near Boston Harbor (Nahant) 17 January 1985. Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1 ...
Retinotopy (from Greek τόπος (tópos) 'place') is the mapping of visual input from the retina to neurons, particularly those neurons within the visual stream. For clarity, 'retinotopy' can be replaced with 'retinal mapping', and 'retinotopic' with 'retinally mapped'. Visual field maps (retinotopic maps) are found in many amphibian and ...
An exoatmospheric kill vehicle ( kinetic penetrator, mid-phase) is launched from Meck Island on 3 December 2001. The Ronald Reagan Ballistic Missile Defense Test Site, commonly referred to as the Reagan Test Site (formerly Kwajalein Missile Range ), is a missile test range in Marshall Islands ( Pacific Ocean ).
The Maidenhead Locator System (a.k.a. QTH Locator and IARU Locator) is a geocode system used by amateur radio operators to succinctly describe their geographic coordinates, which replaced the deprecated QRA locator, which was limited to European contacts. [1] Its purpose is to be concise, accurate, and robust in the face of interference and ...
Map of LATAs in the US. Local access and transport area (LATA) is a term used in U.S. telecommunications regulation.It represents a geographical area of the United States under the terms of the Modification of Final Judgment (MFJ) entered by the United States District Court for the District of Columbia in Civil Action number 82-0192 or any other geographic area designated as a LATA in the ...
The blue area is assigned area codes 301, 240, and 227; the red area is area codes 410, 443 and 667. The state of Maryland is served by the following area codes: Area codes. Numbering plan area. 227.
Numbering plan areas and area codes of Texas (tan). This is a list of area codes in the U.S. state of Texas. The date of establishment of each area code is indicated in parentheses: 210: San Antonio area; overlays with 726 (November 1, 1992) 214: Dallas area, overlays with 469, 972, and 945 (October 1947)
In 3D computer graphics, ray tracing is a technique for modeling light transport for use in a wide variety of rendering algorithms for generating digital images . On a spectrum of computational cost and visual fidelity, ray tracing-based rendering techniques, such as ray casting, recursive ray tracing, distribution ray tracing, photon mapping ...
List of North Carolina area codes. The area codes in the state of North Carolina are as follows: 252 - North Coastal Plain region in the northeast corner of the state, containing the Outer Banks (split from 919 in 1998) 910 / 472 - South Coastal Plain region in the southeast corner of the state, including Wilmington (split from 919 in 1993; 472 ...
An ARRL Numbered Radiogram is a brevity code used in composing ARRL Radiograms during times of radio congestion. The code is used to transmit standard messages, sometimes with customized text, very quickly by experienced ARRL National Traffic System (NTS) message traffic handlers.