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MARINE EXPLORATION

Aquanaut™ Extended Duration Deepwater Node

Aquanaut™: Ocean Bottom Recorder

PRODUCT DETAILS

Featuring 10Hz geophones, Aquanaut™ is designed for extended-duration seabed ocean bottom seismic data acquisition. Nodes can be deployed in depths exceeding 3,450 meters with continuous recording for up to 200 days.

FEATURES

  • Continuous, cable-free 4C autonomous recording
  • Low frequency 10 Hz geophones
  • Battery module: 200 days operation
  • Built-in, full-resolution test generator
  • Solid-state flash memory: 32 GB per channel
  • CSAC clock
  • Internal Heading Sensor
    • 3 Component Magnetic Sensor
    • ±5° Accuracy
    • Measurements written to header every 2,000 samples
Aquanaut_reflection

GS-ONE OMNI 10 Hz Geophone

PHYSICAL SPECIFICATIONS

Moving Mass 13.2g 0.466 oz
Maximum coil excursion p-p 6.10 mm 0.240 in.
Minimum coil excursion p-p 0.89 mm 0.035 in.
Diameter 30.5 mm 1.2 in.
Height 43.2 mm 1.7 in.
Weight 125 g 4.40 oz
Operating and Storage Temperature Range –40°C to +100°C –40°F to +212°F

ELECTRICAL SPECIFICATIONS

All parameters are specified with 7.5 kΩ load at 25°C in all tilt positions unless otherwise stated.

Frequency 10 Hz
Spurious Frequency 150 Hz
Open Circuit Sensitivity 100V/m/s (2.55 V/i/s)
Resistance with Shunt 2500 Ω
Sensitivity at 70% Damping 85 V/m/s (2.15 V/in/s)
Total Damping 70%
Distortion at all tilt angles <0.2% measured at 12 Hz with 0.1 in/s p-p

Hydrophone Deepender™ 5000-X

PHYSICAL SPECIFICATIONS

Maximum Operating Pressure 34.5 MPa (5,000 psi)
Maximum Working Depth 3450 m   (11,319 ft.)
Operating Temperature Range1 –10 to +75°C (+14 to 167°F)
Outside Diameter 50.8 mm (2.0 in.)
Length 38.1 mm (1.5 in.)

ELECTRICAL SPECIFICATIONS

Nominal Capacitance(at 25°C 1atm) 20.0 nanofarads
Voltage Sensitivity2 4.0 μV/μBar
Sensitivity (dBv ref 1μPa @ 25°C) –181.9 dB re 1nC/μPa
Frequency Response (into 2 MΩ load) 3 –15,000 Hz

MECHANICAL SPECIFICATIONS (Housing)

Metric US
Length 500 mm 19.7 in.
Width 215 mm 8.48 in.
Height 111 mm 4.38 in.
Weight in Air 18.2 kg 40.2 lbs.
Weight in Seawater 10 kg 22.1 lbs.
Maximum Operating Pressure 34.5 MPa/345 Bar 5,000 psi
Maximum Operating Depth 3,450 M 11,316 ft.
Operating Temperature Range –5°C to +35°C +23°F to +95°F
Storage Temperature Range –10°C to +40°C +14°F to +104°F

ELECTRICAL SPECIFICATIONS

Digitized 4C Recording Station: 4 Channel, 24 Bit A/D Digitizer 3C Orthogonal oriented GS-One OMNI 10Hz -Geophones 1 DEEPENDER Hydrophone

Digitization 24-bit Delta-Sigma
Sample Interval 0.5, 1, 2, 4 ms
Pre-amplifier Gains 0, 6, 12, 18, 24, 30, 36 dB
Maximum Input Signal 1.8 Vrms
Equivalent Input noise (@2ms sample interval) 0.12 μVrms
Gain Accuracy Better than 1%
Anti-alias Filter 83% Nyquist
Instantaneous Dynamic Range 129dB @ 2 ms sample interval
THD <0.2%
Distance Between Digitizer & Farthest Sensor <18 cm
Distance Between All Sensors <13 cm
Flash Memory 32 GB per channel
Frequency Response 1 Hz – 825 Hz @ 1/2 ms sample interval
Battery Module 200 days operation

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