天绘一号三线阵相机在轨几何参数精化

doi:10.11947/j.AGCS.2016.20150206

摘要/Abstract

摘要： 为了找到适合天绘一号卫星三线阵相机在轨几何精化的模型和算法,首先分析了外方位线元素误差在几何参数精化中的影响,然后通过对定姿数据的预处理,消除了其中含有的高频噪声,并用正弦函数补偿了卫星平台飞行过程中的低频抖动,为三线阵相机每个镜头设计了姿态角常差模型。此外,根据传统的附加参数模型,构建了直接以像素坐标为观测值的内方位元素模型,并使用单侧有控外推的方式,确定最佳的精化模型参数组合及求解策略。试验表明,采用本文的精化方案,利用合理分布的控制点,天绘一号能达到平面精度约1 GSD,高程精度约0.8 GSD。

关键词: 天绘一号卫星, 几何参数精化, 外方位元素, 内方位模型, 立体定位

Abstract: To find the model and method of on-orbit geometric refinement suitable for the triple line array camera of Mapping Satellite-1, this paper first analyzed the impact of the exterior orientation line element error on the geometric parameters refinement, then eliminated the high-frequency noise by the preprocessing of the attitude data, and compensated the low-frequency flutter of satellite platform in the course of flying by sine function and designed the constant angular error model for the lens of the triple line array camera. In addition, an interior orientation model, using directly pixel coordinates as observations, was constructed based on conventional additional parameter model and the combination of the best refinement model parameters and the solution strategy were determined by the unilateral control extrapolative location. The experiments show that the planar accuracy and vertical accuracy are about 1 GSD and 0.8 GSD by the proposed refinement plan and the rational distribution of GCPS.

Key words: Mapping Satellite-1, geometric parameters refinement, exterior orientation elements, interior orientation model, stereo positioning

中图分类号:

P236

耿弘毅, 龚志辉, 高超, 杨戬峰, 唐可. 天绘一号三线阵相机在轨几何参数精化[J]. 测绘学报, 2016, 45(3): 282-290.

GENG Hongyi, GONG Zhihui, GAO Chao, YANG Jianfeng, TANG Ke. On-orbit Geometric Parameters Refinement of Mapping Satellite-1 Triple Line Array Camera[J]. Acta Geodaetica et Cartographica Sinica, 2016, 45(3): 282-290.

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