R&D for an innovative acoustic positioning system for the KM3NeT ...
R&D for an innovative acoustic positioning system for the KM3NeT ...
R&D for an innovative acoustic positioning system for the KM3NeT ...
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The hydrophone data acquition chain<br />
“All data to shore” philosophy payload: 2 Hydros = 12Mb/s, fully sustainable<br />
Hydros +<br />
preamps<br />
Acoustic Data Server<br />
ADS<br />
ADC<br />
Storey Control Module<br />
Adds GPS Time<br />
Sends Acou-data to shore<br />
TCP/IP<br />
Associated science<br />
OMs<br />
optical<br />
fiber link<br />
On-Shore<br />
Storey Conrtol Module<br />
Data Parsing<br />
Acoustic<br />
Positioning<br />
Storey scheme scheme<br />
Hydrophone frequency r<strong>an</strong>ge:<br />
Hydrophone (+ preamp) sensitivity<br />
ADC dynamic r<strong>an</strong>ge<br />
ADC sampling frequency<br />
1 kHz < f < 70 kHz<br />
∼ -170 dB re V/µPa<br />
∼ 120 dB (24 bits / 18÷20 bits effective)<br />
192 kHz (96 kHz optional)<br />
GPS time added offshore by <strong>the</strong> Storey Control Module<br />
Acoustic data tr<strong>an</strong>smission rate 32 bits @ 192 kHz 6.2 Mb/s (1 hydro)<br />
Giorgio Riccobene, LNS-INFN VLVnT 2009, A<strong>the</strong>ns October 13 –15 ,2009
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