FECORE laser experiment - As expected, all of their tests found zero curvature = EARTH IS FLAT

In 2018, the FECORE (Field Engineers Core) team conducted 7 high-precision laser tests across Lake Balaton in Hungary and Lake ljssel in the Netherlands to verify the water surface convexity according to the WGS84 geoid model of the globe earth.

As expected, all of their tests found zero curvature in both lakes, proving the WGS84 model to be practically incorrect.

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