CAJ | 학술논문

该文研究了单探测器和顺轨双探测器机载合成孔径激光雷达在振动条件下的成像处理问题。根据平台振动在短时间内对成像影响小的特点，基于单探测器激光雷达研究了子孔径成像与相位梯度自聚焦相结合的成像处理方法。为获得方位向长条带图像，分别使用了条带相位梯度自聚焦方法和基于多普勒中心频率估计的子孔径图像拼接方法，并分析比较了二者的性能。针对单探测器激光雷达的不足，提出了基于顺轨双探测器干涉处理的振动相位误差估计与补偿方法。仿真分析结果验证了该文方法的有效性。
해문연구료단탐측기화순궤쌍탐측기궤재합성공경격광뢰체재진동조건하적성상처리문제。근거평태진동재단시간내대성상영향소적특점，기우단탐측기격광뢰체연구료자공경성상여상위제도자취초상결합적성상처리방법。위획득방위향장조대도상，분별사용료조대상위제도자취초방법화기우다보륵중심빈솔고계적자공경도상병접방법，병분석비교료이자적성능。침대단탐측기격광뢰체적불족，제출료기우순궤쌍탐측기간섭처리적진동상위오차고계여보상방법。방진분석결과험증료해문방법적유효성。
This study examines the imaging problems in airborne synthetic aperture ladar with single detector and dual detectors along tracks under platform vibration condition. Because platform vibrations affect imaging processing for short intervals negligibly, a method uniting the subaperture imaging and phase gradient autofocus is considered for single-detector ladar. To obtain long stripmap images in azimuth, the stripmap phase gradient autofocus method and the subaperture image mosaic process using Doppler centroid estimation are used. Their performance is analyzed and compared. Considering the shortage of single-detector ladar, a method based on along-track dual-detector interferometric processing is proposed to estimate and compensate for the vibration phase error. The simulation verifies the effectiveness of the proposed methods.