The Design and Experiments on Corner Reflectors for Urban Ground Deformation Monitoring in Hong Kong

Table 1

RCSs of the most common reflectors (where a is the side length, and 𝜆 is the wavelength).

Types of canonical reflectors	Maximum RCS (m^2)
Triangular trihedral	4𝜋𝑎^4/3𝜆^2
Rectangular dihedral	8𝜋𝑎^4/𝜆^2
Square trihedral	12𝜋𝑎^4/𝜆^2
Circular (quarter disc) trihedral	15.6𝜋𝑎^4/𝜆^2