Table 1.
Specifications of the “off-Hatsushima system”.
| Seismometer | Three component servo velocimeter (Manufacturer : Tokyo Sokushin Co., Ltd.) |
| Range: 1 m/s FS (Low gain), 1 cm/s FS (High gain) | |
| 24 bit/200 Hz sampling | |
| Hydrophone | Model : ITC-1010A (Omni-directional) |
| Receive sensitivity : −183 dB/V/uPa | |
| 24 bit/200 Hz sampling | |
| TV camera | SuperHARP camera (Model : OVS-SHK-506A) × 1 |
| Sensitivity : 130 Lux/F : 2.0 | |
| 3CCD camera (Model : OVS-152) × 1 | |
| Sensitivity : 2,000 Lux/F : 8.0 | |
| CTD | Model : SeaBird SBE-9/17plus with Light transmissometer (Model : ALPHA TRACKA2) |
| Range : Conductivity : 0–7 S/m, | |
| Temperature : −5 to 35 °C, | |
| Pressure: 0 to 2,000 psi | |
| Transmissometer : 0 to 100% (@ 660 nm) | |
| Sampling interval : 1 sec. | |
| Sub-bottom thermometer | Thermistor type thermometer (Manufacturer : Nichiyu Giken Kogyo Co., Ltd.) |
| 4ch probe × 2 | |
| Range : −10 to 50 °C | |
| Sampling interval : 10 s. | |
| ADCP | Model : RD Instruments BB-DR-150 |
| Range : Current velocity : <10 m/s | |
| Altitude : 12 to 484 m / 8 m interval | |
| Sampling interval : 1 min | |
| Current meter | Model : Sontec ADVOcean acoustic current meter |
| Range : 1 mm/s−5 m/s | |
| Sampling interval : 10 s | |
| Gamma ray spectrometer | 3 inch spherical NaI(Tl) scintillator (Manufacturer : Shonan Co., Ltd.) |
| Number of channels : 256 | |
| Sampling interval : 1 min | |
| Tsunami pressure gauge | Model : Paroscientific 8B2000-I |
| Range : 0–20 MPa | |
| Sampling interval : 10 s. | |
| Underwater light | Halogen lamp (95 V/250W) × 6 |
| Power supply | DC 840 V |
| Mateable connector | 19.2 kbps serial connectors |
| RS-232, 15V/1A DC power supply × 3 | |
| RS-422, 15V/2.4A DC power supply × 1 | |
| Optical connectors × 4 | |
| Submarine cable | Double armoured electro-optical cable |
| Electrical line × 4; Optical line × 12 | |