| 摘要 |
<p>PURPOSE:To obtain ground radar image with high speed and high accuracy by calculating the phase shift in the radar for loading on aircraft due to the vibration of self plane and compensating the phase of the received echo with polar coordinate calculation. CONSTITUTION:On the ground surface, a transmission wave is emitted from a phased array antenna l, and the wave reflected on the ground is received with the antenna l. A receiver 5 converts it to a digital video reception signal. A primary phase compensation data generator 7 using a platform vibration data from a inertia platform sensor 6, calculates phase compensation data with a calculation on a polar coordinates. A phase compensator 10 using the phase compensation data calculated by the data generator 7, compensates the phase of the video reception signal. Then fast Fourier transform(FFT) calculator 11 detects the corresponding Doppler frequency in the beam. An image data converter 13 makes image and indicates on an indicator 14.</p> |
