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Steered beam radars steer a narrow beam through a scan pattern to build a 3-D picture. Examples include NEXRAD Doppler weather radar (which uses a parabolic dish) and the AN/SPY-1 passive electronically scanned array radar employed by the Ticonderoga class of guided missile cruisers and other ships so equipped with the Aegis Combat System .
The dipole antenna of a radar altimeter of 1947. A radar altimeter (RA), also called a radio altimeter (RALT), electronic altimeter, reflection altimeter, or low-range radio altimeter (LRRA), measures altitude above the terrain presently beneath an aircraft or spacecraft by timing how long it takes a beam of radio waves to travel to ground, reflect, and return to the craft.
Thermochemically, the cerium(IV) oxide–cerium(III) oxide cycle or CeO 2 /Ce 2 O 3 cycle is a two-step water splitting process that has been used for hydrogen production. [30] Because it leverages the oxygen vacancies between systems, this allows ceria in water to form hydroxyl (OH) groups. [ 31 ]
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In 2019, MRT3 was a test channel and broadcast with the Blizoo television service provider. In May 2020, the Macedonian Radio Television launched 3 more channels, including MRT3 (sports channel), MRT4 (international channel) and MRT5 (kids channel).
[3] In May 2008 TV Slovenia began airing a new TV channel, TV Slovenija 3, dedicated primarily to live Parliament coverage. In August 2008 TV Slovenia broadcast their first HD event – Olympic Games 2008 on test DVB-T channel. The Slovenian public broadcaster law referendum, 2010 was rejected by voters. In 2011, analogue signal was abandoned ...
Cerium(III) oxide, Ce 2 O 3, also known as dicerium trioxide; Cerium(III, IV) oxide, Ce 3 O 4 (dark blue) Cerium(IV) oxide, CeO 2, also known as ceric oxide
It exists as the anhydrous salt Ce(SO 4) 2 as well as a few hydrated forms: Ce(SO 4) 2 (H 2 O) x, with x equal to 4, 8, or 12. These salts are yellow to yellow/orange solids that are moderately soluble in water and dilute acids. Its neutral solutions slowly decompose, depositing the light yellow oxide CeO 2. Solutions of ceric sulfate have a ...