Multibeam Echo Sounder (Hydrosweep DS3)

Attention:

Please note that operations of the Multibeam Echo Sounder Hydrosweep DS3 requires experienced scientific staff on board and can be only operated upon request. The system is not operated by the ship's crew. Request operations with the Multibeam Echo Sounder Hydrosweep DS3 to AWI-Bathymetry and AWI-Logistics in sufficient time prior to the cruise and clarify the data transfer after the cruise.

Summary

The Multibeam Echo Sounder uses several frequencies to map the topography of the seafloor. It also provides information about the texture of the seafloor as well as the structure of the water body.

Manufacturer	Teledyne RESON (ATLAS Hydrographic before takeover)
Model	Hydrosweep DS3
Serial No.	n/a
Type	multi-beam echosounder
SENSOR-Link	↪

Transducer Frequency

13-17 kHz

Contacts

Name	Institution	Role
Boris Dorschel	Alfred-Wegener-Institute for Polar and Marine Research	Engineer In Charge, Principal Investigator, Data Scientist
Alfred Wegener Institute for Polar and Marine Research	Alfred Wegener Institute, Helmholz Centre for Polar and Marine Research	Owner
Simon Dreutter	Alfred-Wegener-Institute	Engineer In Charge

Components

The system consists of hull-mounted transducers, top side hardware and operation software.

Subdevices

Name	Model	Serial Number	SENSOR- Link
Hydrosweep RX transducer array	Hydrosweep DS3	n/a	↪
Hydrosweep TX transducer array	Hydrosweep DS	n/a	↪

Position

Info	xyz-position calculated from Alignment Survey Report (2016) to be center between Tx and Rx transducer. Transducer arrays located in box keel, electronics located in E525A, operating computers located in E550 (HSPS-room)
X	77.162 m (X-0 is at the center of der rudder (ref. design drawing of the vessel), positive X-axis is forward and along vessel centerline)
Y	0.001 m (Y-0 at centerline, positive Y-axis is portside)
Z	0.017 m (Z-0 is set to the lowest point of the keel, positive Z-axis is upwards)

Data logging, storage and archiving

Logged parameters

Parameter	Sensor Output Type	Unit
depth	depth	m
Hydroacoustic backscatter	backscatter strength	V

Central geographical ship's position and time standard

Time synchronising of the computers is regulated via Polarstern GPS.
Geographical ship's position centered to HYDRINS position. Post-processing relates data to the transducer position.

Rawdata storage on board

Mass data: The data acquisition and processing software creates rawdata to the directory structure of the mass storage. A reduced data set is also stored in DShip sytem.

root directory	MDM
directory name	CruiseNo e.g. ANT25_3
file name	HS3PHF_YYYY-MM-DDThhmmssZ_XXXXXXXX.asd.acf and YYYYMMDD_hhmmss_PST_Hydrins_1.s7k

Dship

Reduced set of measurement data.

Device name	hydrosweep
Parameters	depth [m]

Data archiving on land

After consultation with the data scientist and AWI Logistics, the operator transfers the measurement data along with required meta data to AWI. Then, the data including meta data can be extracted from https://www.pangaea.de/ (for authorized users only). The reduced DShip data set can be extracted from https://dship.awi.de/.

File format(s)	.asf, .s7k
Calibration certificates	NO

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