Stationary acoustic Doppler current profilers SADIT-75 & SADIT-150
Purpose
Stationary acoustic Doppler current profilers are designed for water column velocity profiling and real-time calculations of the absolute backscatter coefficient
Device appearance
Composition
Profiling of water currents at depths up to 700 m
Estimation of water backscatter coefficient
Determination of absolute ship speed and course
Current profile data collection, modeling and archiving
Composition
Antenna module;Two transceiver antennas integrated into a single housing with ice protection, uses four-beam Janus configuration
Equipment cabinet;Digital and analog processing of received signals, reception and transmission of signals from the antenna
Operator Workstation;Control of the device operation, real-time water profile data display, data post-processing, and map creation
Relative current velocity range:;-5 – 9 m/s
Velocity accuracy:;1,0% + 0,5 cm/s
Number of depth cells for velocity measurement of the current:;up to 128
Opera-ting frequency, kHz;75
Vertical Resolution, m;8;16
<b>Maximum range mode</b>
Maximum depth, m;520-650;560-700
FC velocity error, cm/s*;30;16
<b>High-accuracy mode</b>
Maximum depth, m;310-430;350-450
FC velocity error, cm/s*;15;7
Maximum bottom-tracking depth, m;950
Relative current velocity range:;-5 – 9 m/s
Velocity accuracy:;1,0% + 0,5 cm/s
Number of depth cells for velocity measurement of the current:;up to 128
Opera-ting frequency, kHz;150
Vertical Resolution, m;4;8
<b>Maximum range mode</b>
Maximum depth, m;325-350;375-400
FC velocity error, cm/s*;30;16
<b>High-accuracy mode</b>
Maximum depth, m;200-250;220-275
FC velocity error, cm/s*;15;8
Maximum bottom-tracking depth, m;600
* fluctuation component of error in velocity determination
Operating modes
Maximum Distance (Depth) mode;Coverage of a large water volume for deep-sea investigations
Bottom-tracking mode;High vessel velocity calculation accuracy, data correction taking into account vessel movement
High-accuracy mode;High precision of current velocity and direction measurements, rapid response to parameter changes