ALTITUDE CORRELATION SYSTEM IN THREE-DIMENSIONAL RADAR

摘要

PROBLEM TO BE SOLVED: To enhance accuracy of altitude measurement data by calculating the smoothed altitude of a target craft using an altitude measurement and a maximum movable distance in the altitude direction of the target craft calcu lated based on a target signal from a primary radar, and an SIF mode calcu lated based on a target signal from a secondary radar. SOLUTION: The altitude correlation system comprises a primary radar 2, a secondary radar 3, and a data processor 4. An altitude measurement value hn is calculated based on the positional information and detection time of a target craft 1 obtained from the primary radar 2. An altitude differenceΔH, i.e., the difference between a smoothed altitude H(n-1) from a track processing block 49 and the altitude measurement hn, is then calculated. Subsequently, the positional information and detection time of the target craft 1 obtained from the secondary radar 3 and an SIF mode are delivered to an SIF mode C calculation block 47 in order to calculate the SIF mode C. Thereafter, the SIF mode C altitude differenceΔC, i.e. the difference between C(n-1) and Cn, is calculated and a high mobility decision block 43 makes a decision whether a high mobility state is brought about or not based on the mobility state of the target object 1 obtained from an altitude smoothing block 44.