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Description of the Hydrothermal Vent System
1 Locations of major spreading centers
4 Sketches of black smoker vents
12 other sections not shown
A/D converter acoustic power ambient amplifier amplitude sample autocovariance function axial ridge azimuthal backscattered backscattered signal Benthos sphere black smoker vents bytes chimney circuit board schematic determined diameter Doppler frequency Doppler shifts Doppler sonar East Pacific Rise ensemble average expressed fissures geological Gorda Ridge heat hydrothermal activity hydrothermal circulation hydrothermal vent input jisec lava located magma chamber noise power level number of sample Nyquist boundary operating frequency Operating Mode orifice output parameter particulates precision performance provides pulse pair pulse-pair pyrrhotite R(TS radial velocity range gate receiver bandwidth region rift valley sample pairs sample volume sampling period scan scattering strength schematic is shown seafloor shown in Figure sonar equation source level spreading center spreading rates sulfide structures target temperature thermocouple thermocouple array transducer transmit frequency transmit pulse length velocity maximum velocity precision VEMON instrument vent fluid volcanic volcanic blocks