Measurements for the CAS.

Report SPELEOLOGY, GEOPHYSICS 2020
This test measurement for the Czech Academy of Sciences (CAS) took place in 2013. Today I returned to it. I apply our Spirio program to it, which is used for data collection. We put a few very useful filters in it and we can also choose a color scale to display the values of the reflected wave. From the old radargrams it was possible to “pull out” more details and minor changes in the permittivity of the rocks. The color scale enriched the somewhat dull original display with more colors, it is said that it is finally a little happier … judge for yourself.Measurements in the Cheb basin, cracks and vertical dips were observed here, which could confirm a very slow sinking of the basin. There are sands and gravels, the cracks will not be significant, they do not change the properties of the rocks to a greater extent. Perpendicular cracks appear as peaks at the edges of the layers. One of the cracks can be seen on the blue-yellow interface at the cursor position at a distance of 152 m. The other crack can be at 135 m, at 14 m, etc.

About 1 km further, the lower radargram was measured. It captures a series of oblique cracks in the left part.

The profile measured in Prague at Ladronka is over 1 km long. Apart from a few perpendicular cracks, a change in the permittivity of the rocks can be seen at a distance of 440 m. There may be a geological fault or just shifted blocks of rocks.

No change is drawn on the geological map of the Czech Republic at this location.

Profile near the wall of the Hvězda complex in Prague.