Radar survey is a geophysical technique that uses radar pulses to image the subsurface of the Earth. It is commonly used in archaeology, environmental studies, and geology to map features such as buried objects, geological structures, and groundwater levels. Radar survey works by sending out electromagnetic waves into the ground and measuring the reflections that bounce back to the surface. This data is then processed to create images of the subsurface, allowing researchers to identify and analyze different subsurface features. Overall, radar survey is a non-invasive and efficient method for conducting subsurface imaging and mapping.