Performance of a GPR system which uses step frequency signals

Kong, F.N.; By, T.L.

doi:10.1016/0926-9851(95)90026-8

Cited by 34 publications

(15 citation statements)

References 2 publications

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“…To acquire a trace at 200 MS/s then requires only 25 transmit pulses. • Some designers who advocate the use of frequency domain systems (Kong and By, 1995;Noon, 1996;Langman and Inggs, 1998). Frequency domain systems can be more efficient than time domain systems (Hamran et al, 1995) but commercial use is not yet widespread.…”

Section: Meeting the Requirementsmentioning

confidence: 97%

A borehole radar system for South African gold and platinum mines

Vogt¹

2006

South African Journal of Geology

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Borehole radar is an electromagnetic tool that can be applied to assist in the delineation of orebody geometry, ideally using routinely drilled cover and exploration boreholes. Successful trials of borehole radar for delineating reef horizons on South African gold and platinum mines have led to the development of a borehole radar system specifically designed for routine application in those environments. The radar design includes novel elements, including a receiver with instantaneous sampling down the borehole, and it is implemented in probes that can operate in 48 mm boreholes, with development planned for 38 mm boreholes. The radar is known as the Aardwolf BR40.The need for information about dislocations of 3 m to reefs determines the desirable radar resolution while available access geometry determines the range requirement. The electrical properties of typical gold and platinum rocks show that the range/resolution trade-off is feasible for the majority of economically important reef horizons. Boreholes drilled horizontally or upwards are accessed using a borehole crawler.Trials of the radar show that it meets its performance specification. The radar is robust enough for routine work underground and is easy to use. The borehole radar is a useful addition to the toolbox of the mining geoscientist because it can give information about the reef plane along a line, rather than the single point information about the reef given by a borehole.

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Section: Meeting the Requirementsmentioning

confidence: 97%

A borehole radar system for South African gold and platinum mines

Vogt¹

2006

South African Journal of Geology

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“…In recent years, GPR techniques appear to be the most popular geophysical tool for identifying and locating subsurface karst features, such as cavities, conduits and solutionally enlarged fractures. Reviews of GPR methodology and applications are given in Ulriksen (1982), Imai and others (1987), Davis and Annan (1989), Stevens and others (1995), Mellet (1995), Kong and By (1995), Carlsten and others (1995), Benson (1995), Garsmueck (1996), Grandjean and Gourry (1996), McMechan and others (1997), Young (1998), Trenholm and Bentley (1998) and Witten and Calvert (1999).…”

Section: Previous Related Geophysical Studiesmentioning

confidence: 98%

Use of ground-penetrating radar for assessment of potential sinkhole conditions: an example from Ghor al Haditha area, Jordan

Batayneh

2002

Environmental Geology

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Sinkholes are near-surface indicators of active karst features at depth, such as cavities, conduits and solutionally enlarged fractures. This study tests the usefulness of ground-penetrating radar (GPR) to identify and locate buried sinkholes as a means of interpreting the existence of these subsurface hydraulically-active karst features. GPR survey was made at the Ghor al Haditha area west of the Jordan-DSTF in the Jordan Valley Escarpment at the eastern Dead Sea shoreline. GPR profiles (100 MHz) made along the eastern Dead Sea shoreline showed a trough-like pattern of radar reflections outlining a series of possible filled sinkholes. This feature is about 38 m wide and about 12 m deep. Its width is consistent with the width of the feature obtained from the topographic map of the area. The GPR survey suggests that this feature has been filled with relatively dense and resistive materials. This structure lies almost directly above a major water bearing zone.

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“…In the frequency domain, wideband radar signals can be divided into four subclasses: a chirp signal or named frequency modulation continuous wave (FMCW) signal, a stepped-frequency continuous wave signal (SFCW), a stepped-frequency pulse signal (pulse-SFGPR), and a stepped-frequecny chip signal (SFCS). The steppedfrequency continuous wave signal is the most common and is easy to synthesize and process, making the system easy to actualize (Kong and Lasse, 1995;Sato et al, 2003).…”

Section: Theory Of the Sfgpr Systemmentioning

confidence: 99%

High resolution GPR and its experimental study

et al. 2007

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We develop a high resolution ground penetrating radar system (LANRCS-GPR) based on the E5071B Vector Network Analyzer (VNA). This system takes advantage of a wideband and adjustable frequency domain ground penetrating radar system and adds the characteristics of a network analyzer with ultra-wideband and high precision measurement. It adopts the LAN mode to concatenate system control that reduces construction cost and makes the system easy to expand. The high resolution ground penetrating radar system carries out real time imaging using F-K migration with high calculation efficiency. The experiment results of the system indicate that the LANRCS-GPR system provides high resolution and precision, high signal-to-noise ratio, and great dynamic range. Furthermore, the LANRCS-GPR system is flexible and reliable to operate with easy to expand system functions. The research and development of the LANRCS-GPR provide the theoretical and experimental foundation for future frequency domain ground penetrating radar production and also can serve as an experimental platform with high data gathering precision, enormous information capability, wide application, and convenient operation for electromagnetic wave research and electromagnetic exploration.

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Performance of a GPR system which uses step frequency signals

Cited by 34 publications

References 2 publications

A borehole radar system for South African gold and platinum mines

A borehole radar system for South African gold and platinum mines

Use of ground-penetrating radar for assessment of potential sinkhole conditions: an example from Ghor al Haditha area, Jordan

High resolution GPR and its experimental study

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