RCTT - reflection coefficient of test target

optical radar reflectivity of the target, which is defined as the radiated intensity towards the receiver (Iref – W/sr) measured at target level, immediately after the reflection; divided by the intensity of irradiation received from the transmitter (Et – W/m2) measured at target level, immediately before the reflection
NOTE 1 to entry: The units for RCTT value are in m2/sr.