|
Hydrophone
manufactured by International Transducer Corp.
Hydrophones are mounted in the two seismometers and the cable-end station
of the Kushiro-Tokachi system. |
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1. Hydrophone Sensor Unit
| Hydrophone Sensor | |
| i) Sensor model | ITC-1010 (A-C-Hydrophone) |
| ii) Frequency range | 5 to 200 Hz (capacity value) |
| iii) Wave reception sensitivity | -185 dB, re1 V/micro Pai |
| iv) Beam pattern | omn |
2. Transmission Unit
| A/D Converter | |
| i) A/D converter bits | 24 bits |
| ii) Sampling frequency | 1 kHz ± 100 ppm |
| iii) Input level range | ± 4.5 V |
| iv) Filter band | DC to 200 Hz |
3. Data Processing
| Data sent from the seabed is subjected to
digital filtering processing (Fc = 40 Hz)
with a land device in order to record
and send to JAMSTEC in Yokosuka. |
4. General Characteristic
| Transit area | 1 Hz to 40 Hz |
| Blockage area | 50 Hz or more |
* Due to the effects of the operation of the ADCP, every 30 minutes noise arises in the OBS hydrophone data.
