Results 81 to 90 of about 1,351 (190)
IEEE Journal of Selected Topics in Applied Earth Observations and Remote SensingRadar sounders are air and space-borne nadir-looking sensors operating in high-frequency (HF) or very high-frequency (VHF) bands and collect subsurface backscattered returns by transmitting electromagnetic pulses.
Raktim Ghosh, Francesca Bovolo
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A revised and expanded deep radiostratigraphy of the Greenland Ice Sheet from airborne radar sounding surveys between 1993 and 2019 [PDF]
Earth System Science DataBetween 1993 and 2019, NASA and NSF sponsored 26 separate airborne campaigns that surveyed the thickness and radiostratigraphy of the Greenland Ice Sheet using successive generations of coherent VHF radar sounders developed and operated by The University
J. A. MacGregor +5 more
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On the application of the Stockwell transform to GPR data analysis [PDF]
, 2015 For most archaeological prospections with GPR, target detection is the most important aspect of the surveys. The main efforts of GPR data processing are committed to increase the signal to noise ratio in radargrams.
Riba, Luigi +7 more
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Folding due to anisotropy in ice, from drill-core-scale cloudy bands to km-scale internal reflection horizons [PDF]
The CryosphereUpright folds in ice sheets are observed on the cm scale in cloudy bands in drill cores and on the km scale in radargrams. We address the question of the folding mechanism for these folds by analysing the power spectra of fold trains to obtain the ...
P. D. Bons +11 more
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Iraqi Geological JournalBabylon, one of the most influential civilizations in Mesopotamia, significantly contributed to human history with its rich culture, advanced legal systems, and architectural marvels, serving as the capital of the Neo-Babylonian empire.
Hind Al-Assadi, Najah Abd
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Remote Sensing, 2018 Ground penetrating radar (GPR) using a special unshielded 50 MHz Rough Terrain Antenna (RTA) in combination with a shielded 250 MHz antenna was used to study the capability of this geophysical method for detecting cave sediments.
Teja Čeru, Matej Dolenec, Andrej Gosar
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Georadar - high resolution geophysical electromagnetic device
Geologija, 1995 Georadar is a high resolution geophysical electromagnetic device that was developed in the first part of the 1980's. In Slovenia it was first tested in 1991 on several objects of economicgeological, geotechnical and hydrogeologic nature.Here its ...
Janez Stern +3 more
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Remote SensingHyperbolae in radargrams are caused by a variety of small subsurface objects. The analysis of their curvature enables the determination of propagation velocity in the subsurface, which is important for exact time-to-depth conversion and migration and ...
Tina Wunderlich +4 more
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Microgravimetric and GPR surveys for detection of unconsolidated zones in a levee
E3S Web of Conferences, 2018 Selected results of complex geophysical surveys carried out on the Vistula river flood levee in Cracow are herein presented. Two complementary geophysical methods were applied for detection of potential unconsolidated zones in the body of the levee, i.e.
Łój Monika +3 more
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Remote SensingIn this study, the full-focusing (FF) algorithm is reviewed with the objective of optimizing it for processing data from different types of surfaces probed in altimetry.
Samira Amraoui +9 more
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