Parametric Sub-Bottom Profiler
General & Applications
• First / latest product generation: 2012 / 2021
• Offshore route and site surveys
Performance
• Water depth range: 5 ‒ 2,500 m
• Seabed penetration: up to 100 m (depending on seabed type and noise)
• Range resolution: up to 7 cm (depending on pulse settings)
• Depth accuracy: 2.5 cm + 0.04% water depth
• Motion compensation: Heave, Roll or Pitch (beam forming at transmit and receive;
external sensor data required)
Transmitter
• Principle: parametric (nonlinear) acoustics
• Frequencies: 70 kHz (HF) / 3 ‒ 12 kHz (LF)
• Primary Source Level: >246 dB//μPa re 1m
• Acoustic Power: c. 7.5 kW
• Beam width: c. 3° (±1.5°) for all frequencies
• Pulse type: CW, Ricker, FM Chirp
• Pulse width: 0.1 ‒ 1 ms (CW), 5 ms (chirp)
• Pulse rate: up to 50 Hz (pings/s)
Data Acquisition
• Digital, 2 channels (LF and HF, “SES3” format)
• Sample rate 96 kHz @ 24 bit; resolution <1 cm
• LF sub-bottom data: raw (full-waveform)
• HF data: processed (envelope)
