Mariner
Slim Profile Shallow Water Ocean Bottom Node
PRODUCT DETAILS
Mariner is the next generation shallow water ocean bottom node designed for extended duration seabed ocean bottom seismic data acquisition. The slim profile nodes are ideally deployed as deep as 750 meters. The device continuously records for up to 70 days and offers more rapid recharging times. Its slim profile creates space savings on seismic survey vessels, allowing contractors to fit up to 25% more nodes into a download/charge container.
Mariner, a shallow water ocean bottom node has wireless connector-free charging and data download functionality. Additional features of the Mariner include an internal heading sensor and solid-state flash memory up to 32 GB per channel. Mariner’s four channel node uses all Geospace designed and manufactured sensor components including three patented, high sensitivity GS-ONE geophones configured tri-axially along with an MP-18 BH hydrophone. The built-in full resolution test generator offers users the added security of a fully functional recorder capable of high-fidelity data acquisition.
Mariner is fully compatible with the Geospace Equipment Manager (GEM) 4.0 Unified Interface, a proprietary software package of GeoUtilities, GeoReaper and GeoMerge, that incorporates the power of distributive computing, allowing a single operator interface to control the scalable data collection and delivery needs of any sized crew.
Features
- Wireless charge and data download
- Continuous cable-free 4C autonomous recording
- Maximum operating depth of 750 meters
- Battery life: 70 days operation
- Built-in full resolution test generator
- Solid-state flash memory: Up to 32 GB per channel
- Internal heading sensor
GS-ONE Omni Geophone
Physical Specifications
|
Moving Mass
|
13.2 g
|
0.466 oz
|
|
Maximum coil excursion p-p
|
4.06 mm
|
0.16 in.
|
|
Minimum coil excursion p-p
|
1.02 mm
|
0.04 in.
|
|
Diameter
|
30.5 mm
|
1.2 in.
|
|
Height
|
40.7 mm
|
1.6 in.
|
|
Weight
|
130 g
|
4.60 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
|
15 Hz
|
|
Spurious Frequency
|
>160 Hz
|
|
Distortion at Horizontal
|
0.05% typical
|
|
Coil Resistance
|
1450 Ω
|
|
Sensitivity at 70% Damping
|
69.2 V/m/s (1.75 V/i/s)
|
|
Open-Circuit Damping
|
70%
|
|
Distortion at all tilt angles
|
<0.2% measured at 15 Hz with 0.2 in/s p-p
|
MP 18 BH Hydrophone
Electrical Specifications
|
Nominal Capacitance (at 25°C 1atm)
|
16.0 nanofarads
|
|
Voltage Sensitivity
|
4 V/Bar
|
|
Sensitivity (dBv ref 1μPa @ 25°C)
|
208 dB
|
|
Frequency Response (into 2 MΩload)
|
5 –1,000 Hz (typical)
|
1. Safe to be used slightly below 0°C as long as water is not frozen. Do not let hydrophone be frozen in ice, as this will cause irreversible damage to the crystals.
2. Voltage Sensitivity is specified when connected to OBX.
Mariner
Mechanical Specifications
|
METRIC
|
US
|
|
|
Length
|
578 mm
|
22.75 in.
|
|
Width
|
178 mm
|
7.0 in.
|
|
Height
|
102 mm
|
4.0 in.
|
|
Weight in Air
|
7.85 kg
|
17.3 lbs.
|
|
Weight in Seawater
|
2.39 kg
|
5.26 lbs.
|
|
Maximum Operating Pressure
|
7.5 MPa/75 Bar
|
1,095 psi
|
|
Maximum Operating Depth
|
750 M
|
2,460 ft.
|
|
Operating Temperature Range
|
–5°C to +50°C
|
+23°F to +122°F
|
Electrical Specifications
|
Digitized 4C Recording Station: 4 Channel, 24 Bit A/D Digitizer3C Orthogonal oriented GS-One OMNI Geophones1 MP-18BH-2500 Hydrophone
|
|
|
Digitization
|
24-bit Delta-Sigma
|
|
Sample Interval
|
0.25, 0.5, 1, 2, 4 ms
|
|
Pre-amplifier Gains
|
0, 6, 12, 18, 24, 30, 36 dB
|
|
Maximum Input Signal
|
1.8Vrms
|
|
Equivalent Input noise (@2ms sample interval)
|
0.17μVrms
|
|
Gain Accuracy
|
Better than 1%
|
|
Anti-alias Filter
|
83% Nyquist
|
|
Instantaneous Dynamic Range
|
124dB @ 2 ms sample interval
|
|
THD
|
<0.2%
|
|
Distance Between Digitizer & Farthest Sensor
|
<36 cm
|
|
Distance Between All Sensors
|
<4 cm
|
|
Flash Memory
|
16 GB or 32 GB per channel
|
|
Frequency Response
|
1 Hz – 825 Hz @ 1/2 ms sample interval
|
|
Battery Life
|
70 days operation
|
|
Internal Heading Sensor
|
+/-5º
|
Resources
