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利用由目标运动本身得到的“合成孔径”,就能从地面固定雷达得到运动目标的成象。本文介绍了与这种处理有关的理论和实验结果。对直线飞行和弯道飞行的飞机进行了成象,并给出结果。分析表明,在雷达回波中存在两个相位分量,一个是引入的粗略速度,另一个是目标本身内散射体间的干扰。前者的相位必须在成象之前加以消除并为此研究了一些技术。在给出实验结果前,对预处理、距离曲率、距离校准、运动补偿和推测等问题均作了介绍。在本文介绍的各种处理中,对相参处理音膈、距离丢失和距离重新校准等均作了检验。
Using the “synthetic aperture” obtained by the target movement itself, the image of the moving target can be obtained from the ground-mounted radar. This article describes the theoretical and experimental results related to this treatment. The straight-flight and corner-flying aircraft were imaged and the results were given. The analysis shows that there are two phase components in the radar echo, one is the introduction of coarse velocity and the other is the interference between the scatterers in the target itself. The former phase must be eliminated before imaging and some techniques have been studied for this purpose. Pre-treatment, distance curvature, distance calibration, motion compensation and speculation were all introduced before the experimental results were given. In the various treatments presented in this article, we examined the coherent phonons, distance loss, and distance recalibration.