CAJ | 학술논문

针对星载多基线干涉合成孔径雷达(InSAR)系统，该文研究并提出了基于数字高程模型(DEM)数据、卫星轨道和基线信息的干涉相位的快速仿真方法。利用前向地理编码进行星载InSAR几何约束下的DEM模型匹配，完成多基线InSAR干涉相位生成，并通过多项式近似和混合迭代实现对模型匹配过程的优化。理论分析和仿真实验表明，该方法在显著提高计算效率的同时，保持了较高的相位生成精度，并且对复杂DEM模型有很好的迭代收敛性，适于实现对大场景复杂地形的星载多基线干涉相位快速仿真。
침대성재다기선간섭합성공경뢰체(InSAR)계통，해문연구병제출료기우수자고정모형(DEM)수거、위성궤도화기선신식적간섭상위적쾌속방진방법。이용전향지리편마진행성재InSAR궤하약속하적DEM모형필배，완성다기선InSAR간섭상위생성，병통과다항식근사화혼합질대실현대모형필배과정적우화。이론분석화방진실험표명，해방법재현저제고계산효솔적동시，보지료교고적상위생성정도，병차대복잡DEM모형유흔호적질대수렴성，괄우실현대대장경복잡지형적성재다기선간섭상위쾌속방진。
Based on Digital Elevation Mode (DEM) data, satellite orbit and baseline information, a kind of fast interferometric phase simulation method is investigated and presented for spaceborne multi-baseline InSAR system. By taking advantage of forward geocoding, the match of DEM model under strict spaceborne InSAR geometry is utilized to realize multi-baseline interferometric phase generation, and the match process is further optimized by polynomial approximation and hybrid iteration. Theory analysis and simulation experiments indicate that the proposed method can improve the computation efficiency with enough phase accuracy, as well as better iteration convergence property for complicated DEM model. Consequently, the method is suitable for efficient simulation of spaceborne multi-baseline InSAR interferometric phase for large and rugged terrain.