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NAVIGATION, SWATH BATHYMETRY, CHIRP SBP DATA ACQUISITION

The vessel was set-up for multibeam data acquisition and navigation with PDS-2000 software by RESON.

One workstations was used for the acquisition of multibeam data, interfacing by a multiserial and Ethernet link a RESON 8160 P1 processor, an TSS MAHRS MRU and FOG compass, DGPS receiver (Fugro Omnistar), by a MOXA Multi/serial I/O, TC/P and UDP network sockets. The MBES was the 50kHz, 126 0.5°, 150°aperture RESON 8160 (5000 m range). The sonar head is positioned on the ship's keel using a V-shaped steel frame. A Sound Velocity probe at the Sonar Head is interfaced directly to the MBES processor, thus providing the necessary real-time data for the beam-forming. XBT and CTD casts are normally used for input of the sound velocity profile to the system. An Anderaa Meteorological Station was also made available, at a rate of one measurement every 5 minutes.

The PDS-2000 project was built using the UTM projection, Zone 33. The instrumental offsets (PDS-2000) are presented in Fig. 6 and in Tab. 3


Table 3: Instrumental Offsets on Ship Urania (PDS2000). The GPS antenna (primary positioning system) is located on point DGPS.
POSITION ACROSS ALONG HEIGHT
REFERENCE POINT 0.00 0.00 0.00
DGPS 1.64 14.30 14.18
MBEAM 0.00 14.36 -4.96
MAHRS 0.00 0.0 -3.40
ECHO SOUNDER 33 5.50 -1.85 -3.80
CHIRP -1.0 11.80 -4.00
A-FRAME 6.5 -6.70 0.0
STERN 0.00 -30.60 0.00


figure

Figure 6: Cruise ADR0208. Instrumental Offsets (PDS-2000) on R/V Urania 
\begin{figure}\centerline{\epsfig{file=IMG/ADR0208_URANIA_OFFSETS.eps,width=10cm}}
\end{figure}


next up previous contents
Next: MULTIBEAM BATHYMETRY Up: MATERIALS AND METHODS Previous: MATERIALS AND METHODS   Contents
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