1,721,034 research outputs found
Fast method to transform chirp envelope data into pseudo-seismic data
No full textChirp technology is an acoustic tool for imaging the shallow seabed with a high resolution, used for investigations of modern to Quaternary sedimentary structures and processes and more applied goals, such as hazard surveys for drilling, archeology, geology or engineering fields. In this paper, we present new methods that improve such imaging. During the standard acquisition, the Chirp waveforms are converted into analytic signals and only their envelope is preserved and interpreted, because the highly oscillating signal is otherwise difficult to be identified visually. Doing so, however, the phase information is lost, and the final processing is limited mainly to simple time-varying gain recovery or filtering. We present a work flow including a derivative step to transform the enveloped signal into a seismic-like waveform. In this way, we can apply processing tools as FX deconvolution and migration to improve the signal/noise ratio and reduce diffractions. This method allows reviving standard and legacy Chirp data where the full-waveform information is missing
Applicazione di metodologie GPR multi-fold per lo studio della diffusione di contaminanti liquidi nel terreno
No full textIndagini geofisiche ad altissima risoluzione in siti di interesse archeologico nel comune di Camino al Tagliamento (Ud)
No full text3-D Processing and interpretation of multi-fold Ground Penetrating Radar data: a case history from an archaeological site
No full textVelocity and complex trace analysis of multi-fold GPR data with application to archaeology and environment
No full textMetodi Ground Penetrating Radar (GPR) a copertura multipla lineare e azimutale per indagini ambientali
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2-D and 3-D processing and interpretation of multi-fold Ground Penetrating Radar data: a case history from an archaeological site
No full textIdentification of shallow targets through integrated 2D and 3D multi-fold georadar investigation. A case history
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