GeoScope 100 Parametric SBP

100 kHz parametric SBP · split unit

Two-case mobilisation — An 8 kg transducer and an 11.2 kg IP67 topside unit — the system deploys from a small boat or a vessel of opportunity, with no dedicated survey vessel required.
Deep penetration, long range — Up to 40 m sediment penetration, 200 m operating range and 15 pings per second — an unusual margin for equipment in this portable class.
Profile and bathymetry in one pass — Optional harmonic high-frequency bathymetry at 2.5 cm resolution — sub-bottom profile and water depth are delivered from a single pole deployment.
Thin layers in real sea states — Range resolution of 5 cm combined with heave compensation — thin shallow-water layers and small targets are not lost to vessel motion.

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Overview Technical Specifications Case Study Download

As the split-unit member of the GeoScope series manufactured by Ocean Physics, GeoScope 100 transmits at 85–115 kHz and generates wideband secondary frequencies of 5–25 kHz through non-linear interaction. The low secondary frequency penetrates the sediment while the beam stays within 5–6 degrees, which delivers high resolution and clean layer interfaces without relying on a large-aperture array.

The split-unit configuration houses the processing electronics in a deck case: an 8 kg transducer and an 11.2 kg topside unit rated IP67. The complete system travels in two cases and mobilises quickly, making it an ideal choice for small vessels or vessels of opportunity on challenging projects.

The system runs on 24 VDC with total power consumption below 150 W, connects to the acquisition PC over Ethernet, and provides interfaces for GPS and motion sensors. SPAS acquisition software is supplied as standard, with LayerData Pro post-processing available as an option, and compatibility for third-party platforms such as SonarWiz.

Applications

Geological and geophysical investigation

Sediment survey and analysis for dredging projects

Routing survey and cable-laying

Marine mineral investigation

Sub-bottom searching of cables, obstacles and boulders

Underwater archaeological survey of shipwrecks, relics and geological subsidence

Water column monitoring

Technical Specifications
Primary Frequency	85 - 115 kHz
Secondary Frequency	5 - 25 kHz
Pulse Length	0.05 - 1 ms
Pulse Type	CW, Chirp optional
Ping Rate	up to 15 pings/s
Beamwidth @ Primary Frequency	4.5 ± 0.5 deg
Beamwidth @ Secondary Frequency	5 - 6 deg
Source Level @ Primary Frequency	≥238 dB/μPa@1m 100 kHz
Source Level @ Secondary Frequency	≥194 dB/μPa@1m 20 kHz
Dynamic Range	≥110 dB
Range Resolution	≤5 cm
Sediment Penetration	≤40 m, depending on sediment type and ambient noise
Operating Range	≤200 m
Heave/Roll/Pitch Compensation	heave, subject to external sensor data
Bathymetry Resolution (optional)	2.5 cm
Physical Specifications
Power Consumption	less than 150 W
Power Supply	24 VDC or 220 VAC to 24 VDC
Communication	Ethernet
External Sensors	GPS, IMU
Dimension and Weight of Transducer	362 × 240 × 50 mm, 8 kg
Dimension and Weight of Topside Unit	500 × 400 × 190 mm, 11.2 kg
Protection Level of Topside Unit	IP67
Data Acquisition and Post-processing Software	SPAS acquisition supplied as standard; LayerData Pro post-processing available as an option. Compatible with third-party software such as SonarWiz