at higher frequencies shorter wavelengths antennas with smaller sizes can be used in this case backscattered signals stem from both munition parts perpendicular to the direction of the transmitted signals and irregularities such as fins canards etc fig2 located on the munition surface furthermore the sensor signals are more attenuated by rain and ice particles especially at millimeter wave frequencies the rfp sensor frequency typically is chosen to be around the x and ku bands 8 18 ghz these frequencies provide the following advantages mitigating impacts of weather conditions such as rain hail snow etc minimizing contributions of small irregularities on incoming munitions surfaces to the sensor response and avoiding the atmospheric absorption bands due to both oxygen centered at 60 and 118 ghz and water vapor absorption centered at 22 235 183 and 323 in either case a database of backscattered polarized signals will be created and analyzed the database is created at different configurations for both sensor and incoming munition creating the database is known as a direct scattering or forward scattering in analyzing the data polarization transformation from the local frame of the incoming munition target to the local frame of either the guided munition or a ground station is required a polarization transformation can be employed referring to fig4 the incoming munition 15 has two directions of arrival with respect to the boresight main beam of an rfp sensor 44 located at the origin of a coordinate system x y z these directions are the horizontal angle of arrival u03b2 1 and vertical angle of arrival u03b2 2 as shown in fig4 a.