位置姿态系统(position and orientation system,POS)作为航空遥感中运动补偿的通用载荷,其精度直接影响成像质量。为提高POS的定位定姿精度,在15维传统误差模型的基础上考虑了陀螺和加速度计的刻度因子误差和安装误差的标定残差对POS...位置姿态系统(position and orientation system,POS)作为航空遥感中运动补偿的通用载荷,其精度直接影响成像质量。为提高POS的定位定姿精度,在15维传统误差模型的基础上考虑了陀螺和加速度计的刻度因子误差和安装误差的标定残差对POS精度的影响,并使用随机常值、一阶马尔科夫过程表示陀螺随机漂移和加速度计随机偏置,建立了一个39维的高阶误差模型。为了评价该模型的准确性和实用性,将其与其他的误差模型比较,进行了POS与相机的联合飞行实验。实验结果表明,基于39维高阶误差模型的POS精度较其他的误差模型有明显提高。展开更多
Data obtained via airborne position and orientation system （POS） is in WGS 84 global geocentric reference frame, while the national coordinate reference system for topographic mapping in China is generally Gauss-Kru...Data obtained via airborne position and orientation system （POS） is in WGS 84 global geocentric reference frame, while the national coordinate reference system for topographic mapping in China is generally Gauss-Kruger projection coordinate system. Therefore, data obtained via a POS must be transformed to national coordinate system. Owing to the effects of earth curvature and me- ridian deviation, there are some errors in the process of angle transformation from roll, pitch, and heading （φ,θ,ψ） obtained directly via a POS to the attitude angles of images （φ,ω,κ） needed in photogrammetry. On the basis of effect theories of earth curvature and meridian deviation on exterior orientation angular elements of images, a method using a compensation matrix to correct the transformation errors from attitude angles obtained via the POS to exterior orientation angular elements of images is proposed in this paper. Moreover, the rigorous formula of the compensation matrix is deduced. Two sets of actual data obtained via a POS AV 510, which are different in scale and terrain, are selected and used to perform experiments. The empirical results not only indicate that the compensation matrix proposed in this paper is correct and practical but also show that transformation accuracy of exterior orientation angular elements obtained via the POS based on compensation matrix is relevant to the selection of vertical axis （a projection of central meridian） of Gauss-Kruger projection coordinate system; the proper vertical axis should be the Gauss-Kruger projection of the central meridian of projection zone in which the survey area locates. However, the transformation accuracy of exterior orientation angular elements is irrelevant to the choice of origin of coordinate system; it is appropriate that the origin of coordinate system locates at the center point of the survey area. Moreover, transformation accuracy of exterior orientation angular elements achieved based on the compensa- tion matrix deduced in this paper is higher than that obtained via the existing POS processing software.展开更多
文摘位置姿态系统(position and orientation system,POS)作为航空遥感中运动补偿的通用载荷,其精度直接影响成像质量。为提高POS的定位定姿精度,在15维传统误差模型的基础上考虑了陀螺和加速度计的刻度因子误差和安装误差的标定残差对POS精度的影响,并使用随机常值、一阶马尔科夫过程表示陀螺随机漂移和加速度计随机偏置,建立了一个39维的高阶误差模型。为了评价该模型的准确性和实用性,将其与其他的误差模型比较,进行了POS与相机的联合飞行实验。实验结果表明,基于39维高阶误差模型的POS精度较其他的误差模型有明显提高。
基金Supported by the National Natural Science Foundation of China (No. 40771176, No. 40721001)supported by the Institute of Remote Sensing Applications in Chinese Academy of Sciences, Zhongfei General Aviation Company, Liaoning Jingwei Surveying & Mapping Technology INC, Siwei Aviation Remote Sensing Co. Ltd., and others
文摘Data obtained via airborne position and orientation system （POS） is in WGS 84 global geocentric reference frame, while the national coordinate reference system for topographic mapping in China is generally Gauss-Kruger projection coordinate system. Therefore, data obtained via a POS must be transformed to national coordinate system. Owing to the effects of earth curvature and me- ridian deviation, there are some errors in the process of angle transformation from roll, pitch, and heading （φ,θ,ψ） obtained directly via a POS to the attitude angles of images （φ,ω,κ） needed in photogrammetry. On the basis of effect theories of earth curvature and meridian deviation on exterior orientation angular elements of images, a method using a compensation matrix to correct the transformation errors from attitude angles obtained via the POS to exterior orientation angular elements of images is proposed in this paper. Moreover, the rigorous formula of the compensation matrix is deduced. Two sets of actual data obtained via a POS AV 510, which are different in scale and terrain, are selected and used to perform experiments. The empirical results not only indicate that the compensation matrix proposed in this paper is correct and practical but also show that transformation accuracy of exterior orientation angular elements obtained via the POS based on compensation matrix is relevant to the selection of vertical axis （a projection of central meridian） of Gauss-Kruger projection coordinate system; the proper vertical axis should be the Gauss-Kruger projection of the central meridian of projection zone in which the survey area locates. However, the transformation accuracy of exterior orientation angular elements is irrelevant to the choice of origin of coordinate system; it is appropriate that the origin of coordinate system locates at the center point of the survey area. Moreover, transformation accuracy of exterior orientation angular elements achieved based on the compensa- tion matrix deduced in this paper is higher than that obtained via the existing POS processing software.
