Quote:
Originally Posted by srvy
Also I read Elon Musk was turned down by the Thai military early on but things now have changed with the oxygen levels and rains coming.
I wonder how deep and accurate ground penetrating radar is through a mile of solid rock.
Not sure it worked for our military in Afghanistan.
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How Deep Can It Go?
This is probably one of the most commonly asked questions. In most cases an estimated depth range can be determined with accuracy based upon the subsurface material and the frequency of the GPR antenna. For applications requiring higher resolution, such as locating rebar or conduits in concrete, a higher frequency GPR system (1,000 MHz) is used. This will give high resolution detail for down to approximately 24 inches in depth. Applications which require deeper penetration in ground soil requires a lower frequency (12.5 MHz to 500 MHz). Depending on the subsurface material the depth range can be from a few inches to thousands of feet (as indicated in the chart).
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This is going to be a tricky one. If I had to guess of the O2 tube being run in and a long couple weeks is in their future due to the rainy season, length of swim, lack of surveying data, and there's no roads to transport the extrusion equipment if they managed to find the surface location to begin digging.