Limit of corner reflector concept to remote sensing of trees

The corner reflector concept in remote sensing is discussed. The specularity of the energy return from the corner reflector concept requires that the trunk-ground angle departs from the normal by less thanλ/sinΘ i , typically less than 1°. This study has shown that scatter pattern is multilobed, and that an angular deviation of about ±3° from specular range would still cause most of the scattered energy to return to the radar from the main specular lobe.