Parametric Sub-Bottom Profiler
General & Applications
• First / latest product generation: 2004 / 2024
• Offshore route and site surveys
Performance
• Water depth range: 2 ‒ 2,000 m
• Seabed penetration: up to 70 m (depending on seabed type and noise)
• Range resolution: up to 5 cm (depending on pulse settings)
• Depth accuracy: 2.5 cm + 0.02% water depth
• Motion compensation: Heave, Roll or Pitch (beam forming at transmit and receive;
external sensor data required)
Transmitter
• Principle: parametric (nonlinear) acoustics
• Frequencies: 100 kHz (HF) / 4 ‒ 15 kHz (LF)
• Primary Source Level: >247 dB//μPa re 1m
• Acoustic Power: c. 5.5 kW
• Beam width: c. 2° (±1°) for all frequencies
• Pulse type: CW, Ricker, FM Chirp
• Pulse width: 0.07 ‒ 1 ms (CW), 3.5 ms (chirp)
• Pulse rate: up to 50 Hz, multi-ping mode
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)
