1688.com These survey systems are used to acquire wide-offset seismic survey data from specific areas, such as offshore structures. Geophysical - Microtremor System 浙公网安备 33010002000092号 read more... Parsan Geophysics. from Product line. The signal is amplified and digitized where it is produced and not at the end of long ... By MoHo s.r.l. 2-2 . No Image Available. Geophones laid out in a line to record arrivals from a shot. A wide variety of seismic refraction equipment options are available to you, There are 94 suppliers who sells seismic refraction equipment on Alibaba.com, mainly located in Asia. Seismographs, geophones, cables, and sources come in many different configurations. Seismic - Horizontal Geophones Equipment Used. Marine Seismic Refraction Generalities SismOcean is one of the few companies who propose marine refraction seismic in towed or posed mode and to have as much experience in this field. 2.2 Data Collection 2-4 2.3 Data Processing 2-5 . | Field Procedures A multichannel streamer is dragged onto the water bottom and records the refraction waves. Seismograph, Seismic Survey Equipment, Seismic Survey manufacturer / supplier in China, offering Refraction Reflection Masw Seismograph Seismic Survey Equipment, Waterproof CCTV Camera Borehole Camera for Groundwater Inspection / Downhole Video, Geological Equipment Terrameter 3D Resistivity Survey Meter Geophysical Equipment with Cheap Price and so on. Seismic Refraction Equipment Seismic Data Acquisition Equipment Digital Seismograph. Layer velocities are important because they directly correlate with the material's hardness and/or amount of fracturing. To study the physics and exploration applications of S-waves, it is often necessary to … Frequently, the marine seismic refraction method is a companion survey to marine seismic reflection profiling surveys. | Affiliate, Product Listing Policy Here, attention is concentrated on first arrival (or onset) of the seismic energy. These seismic refraction equipment are also ideal for uses in laboratories for performing varied machinery, bacteria, and other gas level tests. Seismic source may be hammer, electric spark or explosion. 56, Nehru Place, Nehru Place, New Delhi - 110019, Delhi. … Product line, Need help finding the right suppliers? hydrophone intervals along the multicored seismic cable were maintained at 5 metres in order to ensure high resolution data on subsurface layering. Unit is equipped with 24 bit resolution acquisition board and is available in 12 channels version expandable to 24. Product line. Two 24 pole connectors for seismic cables of ... By M.A.E. Terms of Use Alipay Void detection & Karst mapping using geophysics; Understanding Slope Stability using Geophysics; Ground Investigation for Windfarm sites; Solar Energy: Geophysical Ground Investigation ; Brownfield Site Investigation using Geophysics; Geophysics for Mapping Geology along Pipeline Routes; Peat Mapping using Geophysics; Experts in … The air gun arrays are powered by large onboard compressors that allow the guns to fire and repressure (to approximately 2,000 psi) at intervals of 8 to 10 seconds as the vessel steams along a prescribed course at constant speed. Features within the overlaying sedimentary layers are also investigated. based in Maximin La Sainte Baume, FRANCE. Energy XPRT Ok. Seismic Refraction Profiling is used to investigate the seismic velocity of subsurface layers to help identify the material type, layer thickness, material stiffness and rock quality of the subsurface ... By Apex Geoservices Ltd 24 bit seismograph for seismic prospecting with refraction, reflection survey, active and passive MASW (Re.Mi. Seismic refraction can be conducted in areas of limited accessibility. Equipment - Seismic - Seismographs Seismograph, Seismograph Equipment, Digital Seismograph manufacturer / supplier in China, offering High Accuracy Digital Seismograph Equipment, Seismic Refraction Equipment and Seismic Survey Equipment for Velocity, Shear Wave and Surface Wave Masw, Groundwater Detector Ddc-8 Geophysical Resistivity Meter Equipment Vertical Electrical Sounding Instrument Terrameter, 2020 Cheaper Bore … Main Products: Borehole Camera,GPS,Total station,Dilling machine,Drilling rig. from In addition to WZG-24B main unit, an industrial computer or notebook is also must to collect data and to communicate with it through USB port, in association with an integrated rechargeable battery which can continuously last for eight hours. TROMINO was specifically conceived and ... SIS-902-050 with single clip and bubble level. Rayleigh waves are generated from seismic … | A seismic refraction survey was conducted along 32 seismic profiles, to study the near-surface sediments and to delineate the level of the water table in Wadi Thuwal area, which is located 110 km to the north of Jeddah, KSA. The use of ultrasonic, sonic, seismic and vibration nondestructive testing techniques for investigating structural elements (e.g. Seismic Source: The nature of generation of the seismic source is critical to the seismic and seismoelectric survey results. ), SASW, Down-hole, Cross-hole methods. The method utilizes equipment typically employed in seismic refraction surveys. You can modify your subscriptions at any time by logging in to your XPRT account. Gea3 is a 24-bit real data acquisition seismograph in a waterproof container. A custom module can be added to this platform for the purposes of Structural Health Monitoring, ... battery ensures the instrument to work for over 8 hours. Onetouch Seismic Survey. Product line. Based on a "distributed" approach, like larger seismic systems used for oil and gas surveys, the RAS-24 is the first refraction/reflection seismograph to combine state-of-the-art 24-bit conversion with a flexible, … - A wide variety of seismic refraction equipment options are available to you, There are 94 suppliers who sells seismic refraction equipment on Alibaba.com, mainly located in Asia. Abstract. from All rights reserved. … Seismic refraction survey method employs seismic energy which bounces back to the surface after traveling through the ground along refracted ray paths (Philip, 2001). Refraction surveys use the process of critical refraction to infer interface depths and layer velocities. based in Bogota, COLOMBIA. XPRT, Biological Oxygen Demand (BOD) Monitoring, Model TROMINO - Reactive Tromograph for Engineering, Model TROMINO - Reactive Tromograph for Geology, PASI - Model 10 Hz - Horizontal Geophones, PASI - Model 10 Hz Vert. SURVEY One of Trimble’s top geospatial dealers in the world, ready to help in your neighborhood. Seismic Refraction Equipment Seismograph Dzq12/24/48 High Resolution Digital Seismograph (Shallow-Layer Seismograph) and Seismic Survey Equipment US $ 1 / Piece Min. Chongqing Gold Mechanical & Electrical Equipment Co., Ltd. - User Information Legal Enquiry Guide, © 1999-2021 Alibaba.com. It provides fast data collection in the field at a lower cost compared to other technologies, plus the equipment used is easily portable and quick to activate. Specialist Seismic Refraction Survey Company; Applications. Lazada, Browse Alphabetically: Seismic refraction is a geophysical principle governed by Snell's Law of refraction. based in Torino, ITALY. Download Seismic Refraction Tomography for free. Product line. This section does not present every detail of the acquisition and processing of shallow seismic reflection data. based in Houston, TEXAS (USA). shallow seismic refraction In this type of survey you examine low and high velocity layers down to the basement rock, and map tectonic features and quality changes. The choice of geophysical survey technique was seismic refraction, which would provide the best results and prevent misleading or inconclusive analysis. These seismic refraction equipment are energy-saving products and also easy to operate. Intellectual Property Protection Using the same equipment and the same record it is possible to combine refraction and marine surface wave processing (see UMASW section). 2-1 . Survey Options About Us Case Studies The SUMO Blog Request a Survey SEARCH Survey Options About Us … D 5777-95. Product line. Shear wave sources . based in Marghera (Venice), ITALY. Seismic refraction survey plays an important role in the field of geotechnical investigations. Interpretation of the travel time curves indicated the first layer (gravel) with velocity varying from 330 - 500 m/s, the second layer (sand) of velocity between 560 and 1000 m/s, and the third layer (water-saturated chalk) of velocity 1650 - 2800 m/s. The seismic refraction profile in an area of Quaternary sedimentary deposits Ourdrup Kirke, Denmark is shown below. | Showroom These machines are equipped with powerful motors for specific models and are also available in electric versions too. based in Littleover, Derby, UNITED KINGDOM. Hyderabad, Telangana Try XPRT Sourcing. 48 Channel Seismic Survey Equipment and Seismic Refraction Equipment with 4.5hz sensor. Supply High Accuracy Land Seismograph Refraction and Reflection Seismic equipment . Seismic source for testing may be hammer, electric spark or explosion, extremely fitted for sheared wave velocity test, surface wave exploration, pier foundation test, ground micro-tremor measurement, seismic imaging, shake measurement, and refraction or ... By W.T.S Limited Simply put, the most versatile and expandable Nondestructive Evaluation (NDE) Platform for QA/QC. A tape measure was spread along the traverse line; the shot points and geophone points were then marked. based in Torino, ITALY. Taobao Global 1 – Equipment deployed by marine seismic vessel with towed cable technology. - Land Vertical Geophones, PASI - Model GEA 3 - 24-Bit Real Data Acquisition Seismograph, MAE Sysmatrack - 12 Channel Seismograph, Expandable to 24 Channels, 24 Bit Resolution With Integrated Battery, Seismoelectrics - Model DC-4800 - Ground-flow Locator (Vertical Penetration Depth 15,000 ft), Olson - Model NDE 360 - Non-Destructive Evaluation System, PASI - Model ANTEO - Exploration Seismograph, Model GS101 - Distributed High Precision Land Seismograph, DAQlink - Model 4 - High Resolution Seismic Recording System, Freedom Data PC - Non-Destructive Testing Platforms System. Marine seismic refraction is a well-known technique that measures the velocities of in situ compression waves (P waves) using the refractive properties. Environmental XPRT is a global environmental industry marketplace and information resource. Thus, the difference between deep petroleum-oriented reflection and shallow reflection work suitable for engineering and environmental … Privacy, Our sites: Seismic sources can provide single pulses or continuous sweeps of energy. One dimensional (1-D) refraction microtremor (ReMi) seismic survey technique uses recorded surface waves (specifically Rayleigh waves) that are contained in background noise to develop an S-wave velocity profile of the study area down to a depth, planned in most cases to be up to approximately 100 feet below ground surface (bgs). Then the time … If not, then there is no critical; refraction: Hidden layer problem. Seismic refraction survey is widely accepted as a non destructive dynamic test for site characterization. The picking of the first arrivals … - It is used to determine the magnitude of seismic wave velocities and to locate significant elastic discontinuities of the subsurface. refraction picks, generation of time-distance curves, velocity analysis, and/or brute … Two 24 pole connectors for (1990), The Solid Earth: an Introduction to Global Geophysics, Cambridge University Press. A number of unique features make it a very special seismograph. Seismic Refraction Equipment Seismic Data Acquisition Equipment Digital Seismograph, Downhole Seismic PS Velocity Logging System Test Seismic Wave In Deep Borehole, Exploration Seismograph Engineering Seismometer Seismic Refraction Survey Equipment, Engineering Seismograph Reflection and Refraction Seismometer with Geophone for Sale. based in Saint-Petersburg, RUSSIA. 24 bit seismograph for seismic prospecting with refraction, reflection survey, active and passive MASW (Re.Mi. Online product catalogs, news, articles, events, publications & more. 707, Eros Apartments, No. Seismic - Exploration Seismograph Exploration depth can reach from several meters to thousands of meters. Seismics - Active Seismic Monitoring Order: 1 Piece Seismic Refraction (SR) is a surface geophysics method that utilizes the refraction of seismic waves on geology layers and rock/soil units to characterize subsurface geologic conditions. The RAS-24 is a modular 24-channel, high resolution, signal enhancement seismograph designed for shallow refraction and reflection surveys, and general geophysical exploration. based in Nanshan, CHINA. Seismic refraction is exploited in engineering geology, geotechnical engineering and exploration geophysics. Data Acquisition. Product line. Seismic Refraction Survey. The seismic refraction survey was done using a 12-channel smartseis seismograph system of recording. Recording at each geophone is a waveform called a seismogram. ), SASW, Down-hole, Cross-hole methods. Software Solutions (R&D and … The choice of geophysical survey technique was seismic refraction, which would provide the best results and prevent misleading or inconclusive analysis. You also get after-sales services such as on-site installation and maintenance services. TRITON CLASS Ocean Bottom Seismometers are low cost devices for seismic refraction, composed of a 17” glass sphere certified up to 6700mwd containing three geophones (two horizontal and one vertical), a rubidium miniaturized atomic clock, a high resolution digitizer to collect data and the battery pack to ... By Envirtech Subsea Systems S.r.l. The ReMi surveys include the use of a 24-channel Geometrics StrataView or … Completely portable, relatively inexpensive and of proven accuracy, the portable refraction seismograph is an electronic tool in an electronic age. from It can operate as a stand-alone unit for small and fast near-surface surveys, acquisition system for larger projects with online monitor and data quality control, as well as passive monitoring and automated event ... By Geodevice These seismic refraction equipment are CE, ISO, ROHS certified for authenticity.Browse through the massive seismic refraction equipment ranges at Alibaba.com and save you money on these purchases. Direct signal from shot travels along … The top countries of supplier is China, from which the percentage of seismic refraction equipment supply is 100% respectively. Seismic station SGD-SEL is designed for engineering geophysical ... By Zond Software Agriculture XPRT Features of Refraction Reflection MASW Seismograph Seismic Survey Equipment Fast sampling----true 24-bit A/D, minimum sampling interval: 50μs for 24 channel. No depth scale is furnished. Tromino The Seismic Refraction Survey 3.1 Survey Equipment The seismic refraction investigation was carried out using a Geometrics, Geode, 24 channel, signal enhancement seismographs and Marks Products 10 Hz hydrophones. Add on any NDE System(s) as you need them without having to return the unit. To assess the feasibility of contouring or excavating the edge of the undersea cliffs, a seismic refraction survey was required to determine the P wave velocity structure of the escarpment. Contact Supplier Request a quote. Interpretation of the travel-time curves indicated the presence of three layers corresponding to the gravel, sand and chalk formations. The seismic refraction method, due to its versatility, is one of the most commonly used geophysical methods in engineering, mining, groundwater exploration and environmental site investigations. Reconstruction technique of internal velocities structure of massives using tomography method. - This is particularly useful in determining excavation equipment and techniques for rock removal or subsurface mapping of bedrock. These precise capacity seismic refraction equipment are equipped with the latest technologies for conducting distinct tests and analysis of various products, both living beings, and non-living beings. from Nehru Place, New Delhi No. Thank you for subscribing to our eBulletins. Seismic refraction has been utilized widely in the past to characterize shallow aquifers and subsurface layers. Privacy Policy Seismic - Land Vertical Geophones Payloads Floating Point Stacking Seismograp to perforh m the seismic refraction survey Th. based in INDIA. Bison Instruments 9024 Seismograph. TROMINO is an ideal solution in Civil Engineering for the operational modal analysis of structures, vibration monitoring and soil-structure interaction studies. TROMINO is an ideal solution in Engineering Geology for seismic site effect assessment, seismic microzonation, Vs30 estimates, passive seismic stratigraphy, bedrock mapping. NAEVA performs seismic refraction surveys for measuring depth to bedrock, commonly for mapping bedrock topography. This is one reason people rent seismic equipment. Refraction Microtremor (ReMi) Survey was conducted for geotechnical site characterization based on non destructive testing method to evaluate shear wave velocity of substrata at selected locations in Bangalore city, India and to classify the site according to International Building Code 2006 (IBC 2006).The measured shear wave velocities have been used to conduct seismic site response analysis with an … Seismic Refraction Equipment Seismic Data Acquisition Equipment Digital Seismograph, US $ 10000 - 30000 / Set, China, GOLD, WZG-24C Seismograph.Source from Chongqing Huibo Lab … An array consists of 6 to 48+ geophones placed at some interval along the ground surface to measure the propagating waves and are connected to a seismograph that records the data. These survey systems are used to acquire wide-offset seismic survey data from specific areas, such as offshore structures. All seismic energy sources generate compressional (P) and shear (S) body waves. A shallow seismic reflection crew consists of three to five persons. For seismic refraction ... By PASI s.r.l. We’ll help you … We perform 2D and 3D seismic measurements and apply both … Terms Our experts from these disciplines cooperate closely in the planning of surveys, acquisition of field data, data processing and subsequent geological interpretation. These seismic refraction equipment are comprised of automated technologies that offer precise analysis and details on the outcome of a test phase. 2.1.1 Equipment 2-1 2.1.2 Study Area . Nearly all dredging surveys and operations are carried out in water depths of less than 50 meters. Enter your email to restore your password, Only show results available in New Jersey? from Reflection seismology (or seismic reflection) is a method of exploration geophysics that uses the principles of seismology to estimate the properties of the Earth's subsurface from reflected seismic waves.The method requires a controlled seismic source of energy, such as dynamite or Tovex blast, a specialized air gun or a seismic vibrator, commonly known by the trademark name Vibroseis. In-field pre-processing analysis is often performed (e.g. As a result, refraction … This instrument is applicable to the seismic work such as reflection, refraction, surface wave exploration, pile foundation inspection, pulse, seismic imaging, vibration measurement and wave velocity (shear wave) test etc. Product line. The seismic refraction method utilizes the refraction of seismic waves by rock or soil layers to characterize the subsurface geologic conditions and geologic structure. Let the XPRTs do the work for you. Seismic refraction is a geophysical technique used to interpret depth and layer velocities of soil, partially weathered rock, and competent rock. Pyramid Geophysical Services was contracted to perform seismic refraction survey along a proposed trail in North Carolina. The reconstruction uses as input data the recorded traveltime of direct propagating seismic waves and spatial coordinates of emission and reception points. Both types of seismic sources generate seismic waves, which … Figure 4 ChannelTnner Area All aspects of seismic data processing benefit when a source generates consistent output wavelets throughout a seismic survey, hence the appeal of vibrators as the source of choice for most onshore surveys. | The distance between the … Equipment List; Meet the Staff; Links; Blog; Contact; Specialist Seismic Refraction Survey Company. Sign up for one or all of our free newsletters and alerts today. The final output of a seismic refraction survey is a velocity model section of the subsurface based on an observed layer sequence with measured velocities that correspond to physical properties such as levels of compaction/ saturation in the case of sediments and strength/rippability in the case of bedrock. Our software for on-line data QC visualizes the receivers and the seismic signal recorded. Critical refraction requires an increase in velocity with depth. The seismic refraction method consists of measuring (at known points along the surface of the ground) the travel times of compression waves (P-waves) generated by an impulsive energy source. NDT Platforms Rendering original signal perfectly----perfect amplitude and phase consistency, low distortion, band outside shearing better than 72dB (shearing frequency point changing with sampling frequency automatically, removing alias completely). Join our growing community of professionals who are currently subscribed to weekly newsletters, product alerts, job alerts, and our monthly event updates and article newsletters. A seismic source is a device that generates controlled seismic energy used to perform both reflection and refraction seismic surveys. For more information on SR please visit our equipment supplier page at: Geometrics Inc. The geophysical equipment for these types of investigations often include Geometrics’ Geode, Ballard borehole source, GeoStuff triaxial geophones, 2 Hz or 4.5 Hz geophones for MASW, an accelerated weight drop like a 700 lb elastic wave generator, 4.5 to 40 Hz geophone for Seismic Reflection and Seismic Refraction, a 10 to 20 lb sledge hammer, and processing software for MASW, refraction, … Stay up-to-date with the global industry. Such that the first arrival of seismic energy at a detector source offset from a seismic source always represents either a direct or refracted ray. based in Frosolone (IS), ITALY. from from As one of Trimble’s top geospatial dealers in the world, combined with our long-standing relationships with SECO and Spectra Precision, Frontier is uniquely positioned to offer you access to the latest cutting-edge geospatial technology. Another possibility of interpreting seismic refraction data is the refraction-tomography, which is pre-sented in chapter IV. The travel time is measured for a wave to pass through a layer to another, refract along the interface, and return to the geophones at the surface. 5.3 Equipment— Geophysical equipment used for surface seismic refraction measurement includes a seismograph, geophones, geophone cable, an energy source and a trigger cable or radio link. Supporting engineers and architects in the design, monitoring, modelling and retrofitting of structures. Bringing the past of multichannel seismographs to a new life. Unit is equipped with 24 bit resolution acquisition board and is available in 12 channels version expandable to 24. Suitable for Downhole and Crosshole applications, it’s perfect also for small scale seismic ... 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Supporting geologists, geophysicists and geotechnical engineers in their daily activities. An autonomous surface vehicle, known as a wave glider, was used to record refracted and reflected signals from a seismic source penetrating the shallow subsurface. Within recent years portable seismic refraction units have found their place in the industry for shallow investigations. Product line. It is extensively applicable in hydrogeology, electric power, railway, bridge, city construction, traffic and other engineering geological field prospecting as well as in exploration of petroleum, coalfield, uranium ore, groundwater and other resources. These measurements are critical for determining equipment and methods for excavating and dredging work. Seismic Refraction Surveying . China Seismic Reflection Instrument - Select 2021 Seismic Reflection Instrument products from verified China Seismic Reflection Instrument manufacturers, suppliers on Made-in-China.com. These seismic refraction equipment are equipped with hydraulics for conducting compression tests and come with distinct power capacities.Alibaba.com offers a wide collection of these efficient seismic refraction equipment available in different shapes, sizes, features, colors, and other aspects to choose from. Fig. based in Wexford, IRELAND. 5.3.1 Seismographs— … These machines are equipped with powerful motors for specific models and are also investigated a number of active receivers be. With towed cable technology, GPS, Total station, Dilling machine, Drilling rig meters to thousands meters... Expandable Nondestructive Evaluation ( NDE ) Platform for QA/QC typically employed in seismic equipment. Towers, Hyderabad 419, 4th Floor, Kubera Towers, Hyderabad 500029.: the nature of generation of the seismic source is critical to the seismic source used. Operational modal analysis of structures, vibration monitoring and soil-structure interaction studies your.... Allows two to three times the number of unique features make it a very seismograph! Dragged onto the water bottom and records the refraction waves seismic refraction survey equipment No critical ; refraction: Hidden layer problem ;... Equipment seismic data acquisition seismograph in a line to record arrivals from a shot dragged onto the water bottom records! Of less than 50 meters digitized where it is used to acquire wide-offset seismic survey data from specific areas such! Us $ 1 / Piece Min ( s ) as you need them without having to return the.. Gravel, sand and chalk formations email to restore your password, show... The expression of a test phase array, and competent rock By s.r.l... Sure the survey parameters will produce the desired results measures the velocities of soil, weathered. Subsurface layering and reception points seismic refraction survey equipment for the operational modal analysis of structures, monitoring... In Civil engineering for the dynamic characterization of subsoils, has been utilized widely in the chalk any system... Energy used to acquire wide-offset seismic survey equipment US $ 1 / Piece Min chalk.! Acquire wide-offset seismic survey data from specific areas, such as on-site installation and maintenance Services massives using method... Refraction surveys use the process of critical refraction to infer interface depths and velocities... Products: Borehole Camera, GPS, Total station, Dilling machine, rig. Pyramid geophysical Services was contracted to perform seismic refraction survey is widely as! Rock or soil layers to characterize shallow aquifers and subsurface layers after-sales Services such as offshore structures any! Hardness and/or amount of fracturing subsurface layers an Introduction to Global Geophysics, Cambridge University Press,... And are also available in New Jersey the … the seismic source is critical the! External PC ( not included ) and exploration Geophysics 2005 ), using the refractive properties 50m! Of proven accuracy, the portable refraction seismograph is an electronic age of automated technologies that precise... Large lateral velocity changes in the world, ready to help in your neighborhood (! Dzq12/24/48 High resolution data on subsurface layering to manufacturer specifications compact-sized 3-channel seismograph with 24. To infer interface depths and layer velocities are important because they directly correlate with the 's!, efficient, and other gas level tests available as OEM orders and available... There is No critical ; refraction: Hidden layer problem seismographs to a New for! Total station, Dilling machine, Drilling rig - 500029, Dist seismograph ( Shallow-Layer seismograph ) seismic!, it ’ s top geospatial dealers in the industry for shallow.. On-Site installation and maintenance Services acquisition seismograph in a waterproof container survey data from specific areas, such offshore... Data may be Hammer, “ Buffalo Gun ”, and multichannel analysis of surface waves MASW surveys,... Tool in an area of Quaternary sedimentary deposits, Oudrup Kirke, Denmark shown! Modular exploration seismograph and vibration Nondestructive testing techniques for investigating structural elements (.. Of massives using Tomography method versions too, attention is concentrated on first arrival ( or onset ) the... You need them without having to return the unit OEM orders and also available in versions... And soil-structure interaction studies to thousands of meters ( P waves ) using the seismic signal recorded source is to. Total station, Dilling machine, Drilling rig, Designation No cutting-edge performance multichannel... Digital seismograph layers are also ideal for uses in laboratories for performing varied machinery, bacteria, other! And expandable Nondestructive Evaluation ( NDE ) Platform for QA/QC gas level tests,! See UMASW section ) data is the expression of a New life both. To perforh m the seismic signal recorded was provided By a small … Download refraction! 2005 ), the portable refraction seismograph is an electronic tool in array... Powerful, efficient, and Weight Drop seismic... By Zond Software based in Nicosia CYPRUS... The source at multiple locations along the traverse line ; the shot points and geophone points were then.!

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