Correction of attitude fluctuation of terra spacecraft using ASTER/SWIR imagery with parallax observation
Correction of attitude fluctuation of terra spacecraft using ASTER/SWIR imagery with parallax observation
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DOI：
10.1109/tgrs.2007.907424
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发表时间：
2008-01-01
影响因子：
8.2
通讯作者：
Iwasaki, Akira
中科院分区：
文献类型：
--
作者：
Teshima, Yu;Iwasaki, Akira
精确的航天器姿态估计是提供良好的遥感图像几何性能的主要要求。高级星载热发射和反射辐射计/短波红外子系统有6个平行排列的线阵传感器，每条线扫描同一地面目标，相邻波段之间的时间间隔为356.238 ms。当观测值之间存在时滞时，当观测值之间存在姿态波动时，波段间的配准性能变差。由于线扫描的时间分辨率高于卫星提供的姿态信息的时间分辨率，因此以高频率估计姿态数据。我们成功地使用修正的姿态信息校正了图像配准误差。结果，由航天器姿态抖动引起的0.2像素的图像失真被减小到小于0.08像素，这表明具有视差观察的传感器的手到手的配准误差可用于改善由姿态波动引起的图像失真。
Accurate attitude estimation of spacecrafts is the main requirement to provide good geometric performance of remote-sensing imagery. The Advanced Spaceborne Thermal Emission and Reflection Radiometer/.short-wave-infrared subsystem has six linear-array sensors arranged in parallel, and each line scans the same ground target with a time interval of 356.238 ms between neighboring bands. The registration performance between bands becomes worse when attitude fluctuation occurs during a time lag between observations. Since the time resolution of the line scan is higher than that of the attitude information provided from the satellite, attitude data are estimated with a high frequency We succeeded in correcting the image-registration error using the revised attitude information. As a result, the image distortion of 0.2 pixels caused by spacecraft-attitude jitter is reduced to less than 0.08 pixels, showing that hand-to-hand registration errors of a sensor with parallax observation are available to improve the image distortion caused by attitude fluctuation.