Another major advantage of this process is that it does not involve careful mapping or any specific calibration. Irregularities show up in the interferograms, and some of them might be discarded if they are full of errors. . However, due to its long experimentation times, environmental and gravitational field effectsmay have a major impact on the results giving rise to errors . Also, incorporation of large errors might take place due to the difficulty in locating the peaks in the concentration of the diffusion profile . The error obtained in this is of the order of 1% .