| ID | 原文 | 译文 |
| 21945 | 鉴于传统的基于分时成像数据的颤振检测和补偿方法具有密集匹配计算量大，误差干扰程度高和无法分解各旋角方向的颤振量等缺点。 | The traditional time-division imaging data based jitter detection and compensation methods have many drawbacks, which include large amount of calculation and high degree of error interference in dense matching, and it is unable to decompose the jitter quantity in each rotation angle direction. |
| 21946 | 该文以国产遥感系列光学卫星搭载的高频角位移设备为例，研究基于角位移高频测姿数据的直接颤振检测方法和影像几何质量补偿方法。其中包括角位移数据的加窗 FIR 滤波预处理，在俯仰、翻滚和偏航方向随时间变化的颤振曲线分布规律分析，以及基于角位移数据的影像直接定位补偿。 | This paper takes the high-frequency angular displacement equipment which is carried by China's remote sensing optical satellite for example, studies on the direct jitter detection method and the image geometric quality compensation method based on high-frequency attitude measurement angular displacement data, which include the windowed FIR filter pre-processing of angular displacement data, the phase distribution analysis on time-dependent jitter curve in pitch, roll and yaw directions, as well as image direct positioning compensation based on angular displacement data. |
| 21947 | 将高频颤振补偿应用于卫星平台的姿态复原和基于严格成像几何模型的几何纠正解算。 | The high-frequency jitter compensation is applied to attitude recovery and geometric rectification based on strict imaging geometric model. |
| 21948 | 采用北京地区遥感系列光学卫星数据的实验结果表明，该文方法能够显著地改善高频颤振检测的精度和可靠性，有效地提高颤振补偿后卫星影像的内部几何质量，其中长度变形精度提高了 0.5 个像素左右。 | The experimental results of China remote sensing satellite images in Beijing area illustrate that the methods proposed in this paper can significantly improve the accuracy and reliability of the high-frequency jitter detection, and can effectively improve the internal geometric quality of satellite image after jitter compensation. For example, the length deformation accuracy can be improved by 0.5 pixel. |
| 21949 | 在方位多通道高分辨宽测绘带合成孔径雷达(HRWS SAR)系统中，通道间幅相偏差和通道时延偏差将会导致多普勒解模糊性能下降。 | In multichannel High-Resolution and Wide-Swath (HRWS) Synthetic Aperture Radar (SAR) systems, channel amplitude and phase mismatches would degrade the performance of azimuth ambiguity suppression as well as range sampling mismatches. |
| 21950 | 为了解决该问题，该文提出一种基于距离频谱分析的方位多通道 HRWS SAR 通道偏差稳健估计方法。 | To address this problem, a robust estimation method based on range spectrum analysis is proposed in this letter. |
| 21951 | 该算法分为两步：第 1 步，通过对相邻通道回波距离频谱的干涉相位进行相位解缠绕和加权多项式拟合，从而获得通道时延偏差的稳健估计； | The method includes two steps: firstly, by exploiting the interferometric phases between the range spectrums of adjacent channels, the proposed method can robustly estimate range sampling mismatches by the combination of phase unwrapping and a weighted least squares fitting. |
| 21952 | 第 2 步，基于空间互相关理论，根据通道间常数干涉相位同时估计基带多普勒中心和通道间相位偏差。 | Secondly, based on the theory of spatial cross correlation, an accurate Doppler centroid and phase mismatches could be obtained from constant phases between adjacent channels. |
| 21953 | 相比于传统算法，该算法克服了相位缠绕和跳变对系数估计的影响，提高了算法稳健性，而且能同时估计基带多普勒中心和通道相位偏差。 | Compared with traditional methods, the proposed method overcomes the effect of phase wraps and jumps on polynomial coefficient estimation. It not only improves the robustness of parameter estimation but also can simultaneously obtain the Doppler centroid and phase mismatches. |
| 21954 | 实测及仿真数据处理验证了该算法的稳健性和精确性。 | Experimental results based on airborne real data and simulated data validate its effectiveness of the proposed method. |