In publication [24] the **data** of the current paper were successfully treated in the most challenging case: the case of blind data. To do this, the newly developed the so-called approximately globally convergent numerical method (AGCM) was applied. Since these experi-mental **data** are the one-dimensional ones, then it is possible to use them for a comparison of numerical performances of the classical Gelfand-Levitan-Krein integral equation method (GLK) and AGCM. "Blind" means that first the **data** were delivered to the mathematical group by engineers of ARL, Sullivan and Nguyen, who coauthor both this paper and [24]. No information about targets was given to mathematicians, except their placements either above or below the ground. Next, the mathematical group made computations by AGCM and delivered results to engineers. Finally, engineers compared computational results with the truth and informed mathematicians about their findings, see Table 1 and Conclusion in subsection 3.5. The most important observation was that in all available sets of experimental **data** the values of computed dielectric constants of targets were well within limits tabulated in [32,33]. Since dielectric constants were not measured in experiments, then this answer was a quite satisfactory one.