Ground penetrating radar as part of archaeological research is a method that has become increasingly common. The reason is, of course, the rapid development of electronics, with smaller and cheaper components for ground penetrating radar, but also increasingly sophisticated software in line with the development of computers. Ground penetrating radar is similar to the sonar used by fishermen to locate schools of fish, but instead of sound waves, it uses radio waves that are reflected from the ground when the radio wave encounters another medium. A radar wave transmitted through the ground is reflected when it hits a rock in the same way that a wave on a line attached to a wall is only reflected when it hits the wall. If you know how fast the wave is traveling, you can calculate the distance to the wall and the same is true for ground penetrating radar waves. We can also get some information about what the ground penetrating radar's radio waves were reflected against by studying the reflected wave. A line attached to a solid wall will also produce a reflected wave that is different than if the line is attached around a narrow flexible tree branch. The advantage of using only ground penetrating radar in an archaeological survey is that it is a non-destructive method. During an archaeological excavation, the soil is inevitably disturbed and any subsequent excavation on the same site has been deprived of any information. Using ground-penetrating radar in an archaeological excavation also avoids the need to dig up a large area and allows you to go directly to the desired location.