Sample Adrok data

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Underground scan in Reflection mode ("Stare" scan), showing ground level at approximately 1km distance

We test the ground penetrating ability of a low frequency pulse radar system with a center frequency around 3MHz. We previously (van den Doel et al., 2014) reported experimental results measuring the in-situ attenuation rates through limestone and a reflection mode scan of the surface from 350m below ground. In this study we use this radar system to detect a reflection from the ground surface from 1100m below the ground using reflection mode scans. The main difference with the previous study is an increase of stacking by three orders of magnitude. Previously we stacked 500 traces, with our current setup we stack almost 500,000 traces. Results show a clear reflection in the full stack near 21,500 ns.

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