光学学报, 2019, 39 (6): 0628003, 网络出版: 2019-06-17
基于能量对称分布相位相关配准的资源三号02星颤振探测 下载: 865次
Jitter Detection of ZY3-02 Satellite Platform Using Phase-Correlation Registration Based on Symmetrical Energy Distribution
遥感 资源三号02星 颤振 相位相关配准 多光谱影像 remote sensing ZY3-02 satellite jitter phase-correlation registration multi-spectral image
摘要
颤振是卫星平台在轨运行的固有现象之一,也是高分辨率对地观测卫星研究的难点和热点。针对资源三号02星在轨运行过程中的平台颤振情况,提出了一种基于能量对称分布的相位相关配准算法。结合多光谱相机各谱段相机之间的安装关系,考虑到平台的线性平滑运动特性,采用二次函数消除系统变化量,得到线性拟合的平台颤振曲线,最后利用星敏陀螺数据联合滤波得到卫星姿态复合验证曲线。实验结果表明:在模拟数据情况下,所提配准算法的配准精度能够达到0.05 pixel,可有效辅助探测卫星平台的颤振,并首次探测到资源三号02星平台存在0.63~0.65 Hz的颤振,振幅为0.41″~1.12″。
Abstract
Jitter is an inherent phenomenon of on-orbit satellite platforms and is a difficult issue concerning high-resolution earth observation satellites. With respect to ZY3-02 platform's jitter, herein, we propose a phase-correlation registration algorithm based on symmetrical energy distribution. Combining the installation relation among charge-coupled devices at different spectral bands in the multi-spectral camera and considering the linearly smoothing motion characteristics of the satellite platform, we obtain a linear-fitted jitter curve using a quadratic function to eliminate system variation. Finally, satellite attitude data filtered from star tracker and gyro data are used to verify the obtained curve. Experimental results demonstrate that the matching accuracy of the proposed algorithm can reach 0.05 pixel using the simulated data, and thus it can effectively assist in the jitter detection of satellite platforms. Using the proposed method, jitter with the amplitude of 0.41″-1.12″ at the frequency of 0.63-0.65 Hz is detected in the ZY3-02 satellite platform for the first time.
谢俊峰, 莫凡, 王怀, 李响, 朱红. 基于能量对称分布相位相关配准的资源三号02星颤振探测[J]. 光学学报, 2019, 39(6): 0628003. Junfeng Xie, Fan Mo, Huai Wang, Xiang Li, Hong Zhu. Jitter Detection of ZY3-02 Satellite Platform Using Phase-Correlation Registration Based on Symmetrical Energy Distribution[J]. Acta Optica Sinica, 2019, 39(6): 0628003.