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 |
Technical specification
|
Name
|
|
|
|---|---|---|
|
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
|
|
Maximum range mode
|
|
||||
|---|---|---|---|---|---|
|
Maximum depth, m
|
520-650
|
560-700
|
|||
|
FC velocity error, cm/s*
|
30
|
16
|
|||
|
High-accuracy mode
|
|
|
|---|---|---|
|
Maximum depth, m
|
310-430
|
350-450
|
|
FC velocity error, cm/s*
|
15
|
7
|
|
Maximum bottom-tracking
depth, m |
950
|
|
* fluctuation component of error in velocity determination
|
Name
|
|
|
|---|---|---|
|
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
|
|
Maximum range mode
|
|
||||
|---|---|---|---|---|---|
|
Maximum depth, m
|
325-350
|
375-400
|
|||
|
FC velocity error, cm/s*
|
30
|
16
|
|||
|
High-accuracy mode
|
|
|
|---|---|---|
|
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 |
Application
- Oceanography & limnology research
- Climate studies
- Environmental monitoring
- Exploitation control of hydraulic structures
- Commercial Fishing
- Evaluation of construction impact on water currents, tidal currents monitoring
