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Comment: Automatically updated by Registry2Confluence-Transporter (polarstern@ingestsrv1, ask o2a-support@awi.de for questions)

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Note
titleAttention:

Please note that operations of the Sediment Echo Sounder Atlas Parasound P70 requires experienced scientific staff on board for permanent supervision of data aquisition and storage. The system is not operated by the ship's crew. Announce operations with the Sediment Echo Sounder Atlas Parasound P70 to AWI-Logistics prior to the cruise and clarify the data transfer after the cruise.

Summary

Sensorweb integration
urnvessel:polarstern:parasound_p70
contenttypeSummary

The Sediment Echo Sounder surveys the upper layers of the seafloor via the reflection of acoustic signals. Depending upon the reflectivity of the sediments penetration depths of about 200m can be reached.


Sensorweb integration
urnvessel:polarstern:parasound_p70
contenttypeMetadata
ManufacturerTeledyne RESON (ATLAS Hydrographic before takeover)
ModelParasound P70
Serial No.n/a
Typeecho sounder
REGISTRY-Link↪ REGISTRY (1392)


Sensorweb integration
urnvessel:polarstern:parasound_p70
contenttypeImages

Image Added Image Added Image Added Image Added

Transducer FrequencyTransducer Frequency 

Metadata (Metadata Plugin)
0Frequency
High frequency: 19 - 38 kHz; Parametric signal: 0.5 - 6.0 kHz

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Contacts
 Sensorweb integration
urnvessel:polarstern:parasound_p70
contenttypeContacts
 Name  Institution  Role 
Catalina GebhardtAlfred Wegener Institute, Helmholtz Centre for Polar and Marine ResearchPrincipal Investigator
Alfred Wegener Institute for Polar and Marine ResearchAlfred Wegener Institute, Helmholtz Centre for Polar and Marine ResearchOwner

Components
 Metadata (Metadata Plugin)
0Components
The system consits of the transducer, the electronic unit, two computers with installed data acquisition and processing software ParaStore and the subsidiary display on the bridge. 
The transducer consists of four segments and is mounted without ice protection window in the box keel. The transducer transmits in the frequency range of 18 - 39 kHz and reaches water depth of 10 to 11000m. Frequency interferences generate "parametric low frequencies" between 0.5 and 6.0 kHz. Penetration depth into the sediment accounts for > 200m (depending on sediment properties) and the resolution is 6.1 cm.
Image Removed
Position
Position
 Sensorweb integration
urnvessel:polarstern:parasound_p70
contenttypeLocalFrame
Infoxyz-position calculated from Alignment Survey Report (2016), transducer array located in box keel, electronics located in E525A, computers located in E550 (HSPS room)
X76.498 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) 
Y0.004 m
(Y-0 at centerline, positive Y-axis is portside )
Z0.0 m
(Z-0 is set to the lowest point of the keel, positive Z-axis is upwards) 

Data logging, storage and archiving
Logged parameters
 Sensorweb integration
urnvessel:polarstern:parasound_p70
contenttypeParameters
 Parameter  O2ARegistry Output Type  Unit 
depthdepthm
Central geographical ship's position and time standard
The recorded geographical ship's position is the location of the central motion sensor MINS. The lever between transducer and the central motionsensor MINS is considered.
 Metadata (Metadata Plugin)
0timestandard
Time synchronising is carried out via NMEA-telegram from the ZDA data set or via ntp between DIP2 and the central ntp-server of the on-board network. DIP2 functions as ntp-server for the computers and residual DIPs of the Parasound System.
 Metadata (Metadata Plugin)
0shipsposition
 Rawdata storage on board 
The data acquisition and processing software ParaStore creates rawdata on the local drive depending on system configuration. PHF = primary high frequency beam amplitudes, SLF = secondary low frequency beam amplitudes, SHF = secondary high frequency beam amplitudes. Synchonising of the local data directory to mass storage has to be carried out manually in the following data structure:
 Metadata (Metadata Plugin)
0Rawdata

 Metadata list
|| root directory | R:\data01\parasound\ ||
|| directory name | CruiseNo\XXX_ASD_YYYYMMDD \\ CruiseNo\XXX_PS3_YYYYMMDD \\ CruiseNo\XXX_SGY_YYYYMMDD \\ CruiseNo\screenshots \\ CruiseNo\PSAUX \\ CruiseNo\DSHIP \\ with \\ XXX = PHF, SLF or SHF \\ YYYY = year \\ MM = month  day \\ e.g. \\ ANT25-3\PHF_ASD_20090113\ \\ ... ||
|| file name | PS3XXX\_YYYY-MM-DDThhmmssZ\_<identNo>.asd.acf \\ PS3XXX\_YYYY-MM-DDThhmmssZ\_<identNo>.asd.acf.idx \\ XXXYYMMDDhhmm.ps3 \\ XXXYYMMDDhhmm.sgy \\ YYYYMMDD-YYYYMMDD\YYYYMMDD_hhmm*.bmp \\ ??? \\ NAV_YYYYMMDD-YYYYMMDD.txt \\ with \\ XXX = PHF, SLF or SHF \\ YYYY = year \\ MM = month \\ DD = day \\ hh = hour \\ mm = minute \\ ss = second \\ <identNo> = 8-digit running number \\ e.g. \\ PS3PHF\_2009-01-13T112415Z\_00000005.asd.acf \\ ...||
|| Data volume (MB per day) ca | ??? || 
|| Number of files per day ca | ??? ||
 Dship
Reduced set of uncorrected measurement data
 Metadata (Metadata Plugin)
0DShip

 Metadata list
|| Device name | parasound || 
|| Parameters | depth \[m\] ||
Data archiving on land  
space-metadata
0DataOnLand
After the cruise, the operator transfers the measurement data along with required meta data to AWI after consultaion with the data scientist and AWI Logistics. Then, the data (including meta data) can be extracted from https://www.pangaea.de/ (for authorized users only). The reduced, unevaluated DShip data set can be extracted from https://dms.awi.de.
 Metadata list
|| File format(s) | ??? || 
|| Calibration certificates | ??? ||
Documentation
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 Metadata list
Documentation
 Sensorweb integration
urnvessel:polarstern:parasound_p70
contenttypeResources