We discuss in this work, the simulation of radar signals GPR, using Reflexw (Sandmeier, 1998) and GprMax (www.gprmax.org/~agianno/GprMax/Download/) software. Note, however, that the operation of these two programs is based on numerical methods including finite difference method (FD) for Reflexw and finite difference time domain (FDTD) for GprMax. The simulations we have performed include the following items: an iron bar, a plastic tube and a plastic water bottle. According to their simulations, these objects will be buried in the garden of the Faculty of Sciences of Granada and studied experimentally, taking direct action by the radar GPR (www.sensoft.ca), which will test the detection efficiency of this unit.