Sediment Echo Sounder (Parasound P70)

High frequency: 19 - 38 kHz; Parametric signal: 0.5 - 6.0 kHz

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.

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.

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.

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:

Rohdaten an Bord: Die herstellerspezifische Datenerfassungs- und Verarbeitungs-Software ParaStore des PCs erzeugt Rohdaten je nach Systemkonfiguration auf der lokal Datenplatte. * PHF = primary high frequency beam amplitudes * SLF = secondary low frequency beam amplitudes * SHF = secondary high frequency beam amplitudes Diese Daten werden manuell auf dem Massenspeicher in der folgenden Dateistruktur abgespeichert: || Stammverzeichnis || Verzeichnisname || Dateiname || | R:\data01\parasound\ | Reisenummer\PHF_ASD_YYYYMMDD\

Reisenummer\PHF_PS3_YYYYMMDD\
Reisenummer\PHF_SGY_YYYYMMDD\
Reisenummer\SLF_ASD_YYYYMMDD\

Reisenummer\SLF_PS3_YYYYMMDD\
Reisenummer\SLF_SGY_YYYYMMDD\
Reisenummer\SHF_ASD_YYYYMMDD\

Reisenummer\SHF_ASD_3YYYYMMDD\
Reisenummer\SHF_SGY_YYYYMMDD\
Reisenummer\screenshots\
Reisenummer\PSAUX\
Reisenummer\DSHIP\ | PS3PHF_YYYY-MM-DDThhmmssZ_<identNo>.asd.acf
PS3PHF_YYYY-MM-DDThhmmssZ_<identNo>.asd.acf.idx
PHFYYMMDDhhmm.ps3
PHFYYMMDDhhmm.sgy
PS3SLF_YYYY-MM-DDThhmmssZ_<identNo>.asd.acf
PS3SLF_YYYY-MM-DDThhmmssZ_<identNo>.asd.acf.idx
SLFYYMMDDhhmm.ps3
SLFYYMMDDhhmm.sgy
PS3SHF_YYYY-MM-DDThhmmssZ_<identNo>.asd.acf
PS3SHF_YYYY-MM-DDThhmmssZ_<identNo>.asd.acf.idx
SHFYYMMDDhhmm.ps3
SHFYYMMDDhhmm.sgy
YYYYMMDD-YYYYMMDD\YYYYMMDD_hhmm*.bmp
???
NAV_YYYYMMDD-YYYYMMDD.txt | mit YYYY = Jahr; MM = Monat; DD = Tag; hh = tunde; mm = Minute; ss = Sekunde; <identNo> = 8 stellige Laufende Nummer Dabei belegt die Dateistruktur das folgende Volumen: ||Volumen (MB pro Tag) ca.|??? || || Anzahl Dateien pro Tag ca. | ???|
Rohdaten an Land: Je nach Absprache mit der AWI-Logistik und mit dem oben genannten Geräteverantwortlichen besteht die Möglichkeit die gewonnenen Rohdaten, nachdem sie mit Metadaten versehen worden sind, über PANGAEA zur Verfügung zu stellen.

Lantronix 16-Port

Rechnerraum