A radar-to-radar interference prediction model

The radar interference prediction program (RIPP) is described. RIPP is a computer model that predicts interference between radars assuming antenna-to-antenna coupling. The measure of effect that RIPP calculates is the probability of interference (P_i). P_i is defined as the probability that the interference-to-noise ratio (INR) exceeds the 50% probability of detection threshold. Results of a sample analysis are presented. The RIPP model assumes that the radars are in the same or adjacent bands. It also assumes that the radars are located in the antenna far field. This program has been used by the US Navy to determine the possible levels of interference between two radars and to select compatible frequency assignments