Cobra gpr
0-120 m Penetrating.
Real-Time Sampling.

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COBRA PLUG-IN GPR FUNCTIONS
Real time sampling
The COBRA PLUG-IN GPR uses Real Time Sampling of the radar signal. Today major manufacturers use conventional interleaved sequential sampling, giving only a down converted replica of the real signal.
The Real Time Sampling allows for 32,000 stacks/second resulting in an amazing 45 dB increased signal-to-noise ratio.
Wireless
Wireless Bluetooth connection between GPR and control unit replaces interfering coax-cables and fragile fibre optic links. An Ultra Rugged Mesa PDA with embedded software is used for data collection.
Data is stored in standard SEGY geophysical format. The complete GPR-unit plugs into a single SUBECHO Antenna, any selectable model. No need for bistatic configuration.

The SUBECHO-antennas can all be used airborne and in air-coupled operation and in any type of terrain. No need to cut trail paths anymore, not even in dense bush vegetation were ground coupled snake antennas have problems passing. Just lift the antenna above the bushes or in worst case use an octocopter UAV to carry the small and compact Cobra Plug-In. Wireless operation, hand held data logger, low power consumption and an air coupled antenna add flexibility, ruggedness and durability and the most compact and deepest penetrating GPRsystem available on the market.
Maximum penetrations in good conditions, low conductivity, are listed below:
SOIL TYPE Dry soil Average soil Wet soil Very wet soil Water
RDP-VALUE εr=4 εr=9 εr=16 εr=25 εr=81
Depth @1600 ns 120 m 80 m 60 m 48 m 27 m
Real Time Sampling Advantage
In February 2012 we made a comparison study between the COBRA PLUG-IN GPR, a Real Time Sampling GPR, and a conventional Sequential/ Interleaved Sampling GPR, the GSSI SIR-3000 GPR.

The performance study was made the same day, on an ice road passing Lule River and used the same model antennas.
THE DATA
The data below shows the same 115 m long distance with cut raw data from the systems, top sample from 200 to 500 ns range and bottom sample from 1000 to 1200 ns range. The samples clearly illustrate the advantage of using Real time Sampling Technology compared to conventional sampling.

• LESS RINGING
Explained by wireless operation, no cables and lower transmitter output voltage (40V vs. 1200V)

• LESS HIGH FREQUENCY NOISE
Seen as "snow" or "speckle" in the lower sample SIR-3000 data. (45 dB increased S/N-ratio)

• BETTER RESOLUTION
Monostatic antenna for Cobra Plug-in GPR and Bistatic for SIR-3000 (Smeared reflections with SIR-3000)
COBRA PLUG-IN GPR RAW DATA
GPR-SYSTEM Radarteam Cobra Plug-In
GPR-TYPE Real Time Sampling System
PRF-RATE 156 kHz
TIME RANGE 0-1,600 ns
TRANSMITTER Utsi Electronics Ltd, 40 V
   
ANTENNA Radarteam SE-150 (1 monostatic mode)
ANTENNA DEPLOYMENT Handheld 60 cm above ice
STACKING 32,000 stacks/s
POWER Integrated 11.1 V/ 6.6 Ah, 73 Wh
OPERATING TIME 16 hours continuous
TOTAL WEIGHT 5 kg (including battery)
COBRA PLUG-IN GPR RAW DATA
GPR-SYSTEM GSSI SIR-3000
GPR-TYPE Time Equivalent Sampling, 512samples/trace
PRF-RATE 50 kHz
TIME RANGE 0-1,200 ns
TRANSMITTER Geoscanner AB, VHT-501, 1200 V
HIGH POWER SUPPORT Geoscanner AB, PRF-600
RECEIVER Geoscanner AB, RX-501
ANTENNA Radarteam SE-150 (2 in bistatic mode)
ANTENNA DEPLOYMENT Cart, 10 cm above ice
STACKING 5 stacks
POWER 73 Wh (SIR-3000), SLA 12V (PRF-600)
OPERATING TIME 4 hours continuous
TOTAL WEIGHT 23 kg (including batteries and cart)
Contact us now for a quotation or further information!
CART WITH TACTICAL CRADLE
CAR TRAILER KIT
RECOMMENDED OPTIONAL ITEMS
Enhance your survey experience
APPLICATIONS & USES
The COBRA PLUG-IN GPR can be used to see the inside of very deep materials and structures up to 120 m depths
GEOTECHNICAL SAFETY APPLICATIONS
Geotechnical stratigraphy and soil structure studies. Depth to bedrock.
Identify voids under: roads, airports, tunnels, railways.
Safety control of embankment dams (piping/voids in core and fractures in bedrock under dam).
Control of remaining barrier distance to abandoned water filled tunnels in coal mines (must exceed 60 m for safety).
Airborne mapping of frazil ice build up in streaming water.
Tunnel & rock quality inspection.
Karst caves and sinkhole mapping.
Mapping of frost sensitive soils under roads- and railways.
SNOW & ICE RESEARCH
Airborne and ground based mapping of glacier ice thickness. Airborne detection of dangerous crevasses before passing
GROUNDWATER AND MINERAL PROSPECTING
Groundwater supply from sand- and gravel deposits. Detection of water bearing fracture zones in bedrock. Locate gemstone pockets in pegmatite, nickel laterite, bauxite delineation. Kimberlite exploration. Mineral placer exploration-paleochannels. Sand & gravel deposits exploration. Peat bog investigation and mapping. Marble prospecting and quality inspection.
ENVIRONMENTAL SURVEYS
Locate hazardous waste.
Delineation of landfills, contaminant plumes and product spills.
Mapping of water and sediment depths of lakes and rivers.
ARCHEOLOGY
Mapping of deep buried structures, pyramids, tunnels and chambers.
MILITARY & SECURITY
Locate deep clandestine tunnels/bunkers in militarized zones and around borderlines and prisons
Benefits of Drone GPR
The COBRA Plug-In GPR is compact, lightweight, and capable of penetrating up to 120 m depths. It allows not only for typical GPR applications but also many additional ones: mineral prospecting, archeology, military and security.

Compact Design
Light Weight
All Weather
Low Power
Better SNR
Depth Penetration
0 - 120 m Depths
The COPRA PLUG-IN GPR can penetrate up to 120 m depths. It has wide applications covering from shallow and detailed surveys with high resolution to very deep geological with low frequency antennas.
Compact and Portable
Light weight, portable, and affordable. Suitable for drone-based surveys in rugged terrain, military UXO mapping, crevasse detection, and more.
End-to-End Solution
We provide a complete, end-to-end remote sensing solution and consultancy services for underground mapping, environmental surveys, geotechnical studies, groundwater and mineral prospecting.
Technical Paper
Evaluation of Ground-Based and Helicopter Ground-Penetrating Radar Data Acquired Across an Alpine Rock Glacier
By Kaspar Merz, Hansruedi Maurer, Thomas Buchli, Heinrich Horstmeyer, Alan G. Green and Sarah M. Springman
To forecast rock glacier movements, it is necessary to have dependable information on their internal structures and physical properties. We recorded GPR data using a helicopter-mounted system. The helicopter GPR sections were surprisingly good, with consistent images along adjacent and intersecting profiles. Internal shear horizons, ice-rich and ice-poor regions and the bedrock interface were well delineated on the helicopter GPR images.
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