Fig. 2: Muography raw measurements from variable-length acrylic and saturation-dependent sand experiments.
From: Laboratory-scale muography experiments to estimate density and saturation in porous media

Regression fitting analysis using two functions (exponential and exponential with a constant c), where the mean flux decreases as the density-length increases. a The relationship between the measured mean raw hourly muon flux (\({\Phi }_{{{{\rm{m}}}}}\)) and b changing acrylic length and the relationship between measured mean raw hourly muon flux (\({\Phi }_{{{{\rm{m}}}}}\)) and changing fluid saturation changing sand. The error bars represent 1σ (blue) and the SD of the three measurements per object, showing the statistical spread of the data.