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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 ...
raytheon.com (Archived) The Raytheon Company was a major U.S. defense contractor and industrial corporation with manufacturing concentrations in weapons and military and commercial electronics. It was previously involved in corporate and special-mission aircraft until early 2007. Raytheon was the world's largest producer of guided missiles. [ 3]
A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens. It is widely used in optical engineering laboratory work to analyze and ...
New artifacts have been found on the legendary Spanish galleon San Jose, Colombia's government announced Thursday, after the first robotic exploration of the three-century-old shipwreck.
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects. A direct distance measurement of an astronomical object is possible only for those objects that are "close enough" (within about a thousand parsecs) to Earth.
New details about Tom Cruise ’s stunt at the 2024 Paris Olympics are coming to light. The “ Mission: Impossible ” star closed Sunday’s ceremony in true Hollywood fashion by leaping into ...
Caliper (s) or calliper (s) are an instrument used to measure the dimensions of an object or hole; namely, the length, width, thickness, diameter or depth of an object or hole. The word caliper comes from a corrupt form of caliber. [ 1][ 2][ 3] Many types of calipers permit reading out a measurement on a ruled scale, a dial, or an electronic ...
WASHINGTON (Reuters) -A U.S. regulator said on Wednesday it still believes that air bag inflators in 49 million U.S. vehicles assembled by 13 automakers pose serious safety risks and it is ...