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Furuno FAR2117 X-Band Radar coupled to a WAMOS wave and surface current monitoring system. Configured to 1.5 nm range, with antenna rotation speed at 42 rpm. RD Instruments 75 & 150 kHz broadband Acoustic Doppler Currents Profiler , running University of Hawaii SOEST's UHDAS software.
A chip log consists of a wooden board attached to a line (the log-line). The log-line has a number of knots at uniform intervals. The log-line is wound on a reel so the user can easily pay it out. Over time, log construction standardized. The shape is a quarter circle, or quadrant with a radius of 5 inches (130 mm) or 6 inches (150 mm), [1] and ...
The pulse width ( ) (or pulse duration) of the transmitted signal is the time, typically in microseconds, each pulse lasts. If the pulse is not a perfect square wave, the time is typically measured between the 50% power levels of the rising and falling edges of the pulse. The pulse width must be long enough to ensure that the radar emits ...
Electromagnetic log. An Electromagnetic Log, sometimes called an "EM log", is an electronic sensor which measures the speed of a vessel through sea water. Like many other technologies, its name derives from the traditional chip log. It makes use of Faraday's law of induction by measuring the EMF induced in water moving through a magnetic field ...
Furuno. Furuno Electric Co., Ltd. (古野電気株式会社, Furuno Denki Kabushiki-gaisha) (commonly known as Furuno) is a Japanese electronics company whose main products are marine electronics, including marine radar systems, fish finders, and navigational instruments. The company also manufactures global positioning systems and medical ...
E.M. Speed Log Skipper DL850, 270 kHz; Acoustic Range and Bearing Indicator, 9–11 kHz; Acoustic Doppler Current Profiler (ADCP) RDI, 75 kHz; ... Furuno FM-2510, ...
An acoustic doppler current profiler (ADCP) is a hydroacoustic current meter similar to a sonar, used to measure water current velocities over a depth range using the Doppler effect of sound waves scattered back from particles within the water column. The term ADCP is a generic term for all acoustic current profilers, although the abbreviation ...
Radar is a system that uses radio waves to determine the distance (ranging), direction (azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method [ 1 ] used to detect and track aircraft, ships, spacecraft, guided missiles, motor vehicles, map weather formations, and terrain.
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