Self-adaption Bundle Adjustment of Three-line Array Image with Smoothing Equation of Exterior Orientation Elements

doi:10.11947/j.AGCS.2018.20170217

Abstract

Abstract: Exterior orientation elements is a key factor to effect the location accuracy of optical satellite images, and its accuracy is depended on not only the attitude and orbit determination system, but also the stability of satellite platform.However, there is a mutation phenomenon in satellite engineering, which will lead to a big change of vertical parallax in processing strip.In this paper, based on the theory of EFP bundle adjustment of all three-line intersection, the strategy and mathematical model of self-adaption bundle adjustment with smoothing equation of exterior orientation elements are proposed.Firstly, the image is segmented automatically according to the vertical parallax difference data of the stereoscopic image.Then, the different weights of smoothing equation of external orientation element are given with different image segments, and participated in bundle adjustment.Finally, the experiments are performed and the results show that the proposed method can effectively restrain the influence of the satellite attitude observation mutation to the accuracy of positioning without control of stereo images, especially the elevation accuracy improved significantly.

Key words: satellite photogrammetry, attitude determination system, bundle adjustment, location accuracy, smoothing equation, self-adaption

CLC Number:

P236

WANG Jianrong, WANG Renxiang, HU Xin. Self-adaption Bundle Adjustment of Three-line Array Image with Smoothing Equation of Exterior Orientation Elements[J]. Acta Geodaetica et Cartographica Sinica, 2018, 47(7): 968-972.

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