 
 <prompt> Wetin dey make from mesh like material wey fit use catch fish? Given the previous question, write a context wey contain the answer. E fit be 1 - 20 sentences. Context: <response>: "The beta quality of ground reflection dey depend on topography of di surface. If di surface get small small roughness pass di wavelength, we dey for specular reflection regime, and di receiver go see both di real antenna and an image of di antenna wey dey under di ground sake of reflection. But if di ground get roughness wey no be small compared to di wavelength, reflections no go dey coherent but dem go dey shift anyhow. With shorter wavelengths (higher frequencies), dis one dey happen generally." 