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Marine Optical Buoy
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Marine Optical Buoy : ウィキペディア英語版
Marine Optical Buoy
The Marine Optical Buoy (MOBY) measures light at and very near the sea surface in a specific location over a long period of time, serving as part of an ocean color observation system. Satellites are another component of the system, providing global coverage through remote sensing; however, satellites measure light above the Earth's atmosphere, becoming subject to interference from the atmosphere itself and other light sources. The Marine Optical Buoy helps alleviate that interference and thus improve the quality of the overall ocean color observation system.
==Physical description==
MOBY is a buoy 15 meters tall floating vertically in the water with approximately 3 meters above the surface and 12 meters below. A float canister is at water level, measuring approximately 2 meters high and 1.5 meters in diameter above the water, 1 meter in diameter below the water. Above the float canister are four solar panels and an antenna column. From the bottom of the float canister, a central column descends to a 2-meter-high, 1-meter-diameter instrument canister. Along the central column are three standoff arms measuring 3 meters long, 2.5 meters long, and 2 meters long, respectively. The standoff arms can be relocated up and down the central column during maintenance. Light collectors are at the ends of the standoff arms and at the top of the antenna column. The antenna column includes Global Positioning System (GPS), very high frequency (VHF), and cellular telephone antennas. Computers, communications, and control electronics occupy the float canister. A marine optical system (MOS), a power system, and batteries occupy the instrument canister. The MOS includes spectrographs with charge-coupled device (CCD) detectors, an optical multiplexer, and fiber optic sensor lines to the light collectors.〔

MOBY has a tether to another buoy that is moored to the sea floor at a depth of about 1200 meters. MOBY is located at , west of Lanai, in the lee of the Hawaiian Islands.〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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