👉 Underdrift is a concept in radar astronomy that describes the phenomenon of radar waves traveling at an angle to the horizontal, rather than parallel to them. This can result in a reduced signal-to-noise ratio (SNR) compared to normal propagation directions, leading to increased detection errors due to aliasing and interference effects. In radar astronomy, underdrift is often encountered when radar systems are designed for underwater use or when there is limited visibility from the surface. Underdrift can cause problems such
