| 摘要 |
PROBLEM TO BE SOLVED: To calculate, with a radar device, the estimated altitude of a target that will not pass directly above the radar device. SOLUTION: This radar device comprises: an antenna 101 for radiating a radio beam and receiving the reflected waves; a drive controller 102 for controlling the direction of the antenna; a transmitter-receiver 103 for generating a transmitted signal and outputting a digital received signal; a pulse Doppler processor 104 for performing correlation processing on the received signal; a target signal detector 105 for detecting a target signal comparing with a threshold; a distance instrument 106 for measuring the target distance based on the radio wave emitting time and target signal detecting time; an azimuth angle instrument 107 for measuring the target azimuth angle, based on the beam transmitting angle; a Doppler instrument 108 for measuring the target Doppler frequency, based on the pulse Doppler processing result; a visual line velocity calculation apparatus 109 for measuring the target visual line velocity based on the Doppler frequency; a delay apparatus 110 for delaying the measured values of the target distance, azimuth angle, and visual line velocity; and an estimated altitude calculation apparatus 111 for calculating the target estimated altitude based on the measured result and the distance, azimuth angle, and visual line velocity values before a predetermined time. COPYRIGHT: (C)2010,JPO&INPIT |
