CAJ | 학술논문

与其它波段相比，毫米波干涉SAR (InSAR)具有精度高、体积小的特点，是目前干涉SAR研究的重要方向之一。但由于较短的波长，其也给成像处理和干涉相位提取带来了一定困难。该文利用毫米波段干涉SAR数据，采用流结构后向投影(BP)算法结合IMU进行了毫米波SAR成像和干涉相位分析。研究发现，由于毫米波波长短，对天线相位中心变化更为敏感，为了保证系统的干涉相位，必须利用IMU数据进行精确的运动误差补偿。通过实测数据验证了采用各自计算天线相位中心的策略，后向投影算法可以在成像过程中精确补偿平地相位。
여기타파단상비，호미파간섭SAR (InSAR)구유정도고、체적소적특점，시목전간섭SAR연구적중요방향지일。단유우교단적파장，기야급성상처리화간섭상위제취대래료일정곤난。해문이용호미파단간섭SAR수거，채용류결구후향투영(BP)산법결합IMU진행료호미파SAR성상화간섭상위분석。연구발현，유우호미파파장단，대천선상위중심변화경위민감，위료보증계통적간섭상위，필수이용IMU수거진행정학적운동오차보상。통과실측수거험증료채용각자계산천선상위중심적책략，후향투영산법가이재성상과정중정학보상평지상위。
Compared with other bands, the millimeter wave Interferometric Synthetic Aperture Radar (InSAR) has high accuracy and small size, which is a hot topic in InSAR research. On the other hand, shorter wavelength causes difficulties in 2D imaging and interferometric phase extraction. In this study, the imaging and phase performance of the streaming Back Projection (BP) method combined with IMU data are analyzed and discussed on the basis of actual Ka-band InSAR data. It is found that because the wavelength of the Ka-band is short, it is more sensitive to the antenna phase-center history. To ensure the phase-preserving capacity, the IMU data must be used with accurate motion error compensation. Furthermore, during data processing, we verify the flat-earth-removing capacity of the BP algorithm that calculates and compensates the master and slave antenna phase centers individually.