Optimization of Lateral Swing Angles of Lunar Satellite for Region Multiple Strip Imaging Task Planning

LI Shixue; SHEN Xin; YAO Huang; ZHANG Guo; LIU Yulin

doi:10.13203/j.whugis20170145

Volume 44 Issue 4

Apr. 2019

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Geomatics and Information Science of Wuhan University > 2019 > 44(4): 593-600. > DOI: 10.13203/j.whugis20170145

LI Shixue, SHEN Xin, YAO Huang, ZHANG Guo, LIU Yulin. Optimization of Lateral Swing Angles of Lunar Satellite for Region Multiple Strip Imaging Task Planning[J]. Geomatics and Information Science of Wuhan University, 2019, 44(4): 593-600. DOI: 10.13203/j.whugis20170145

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Optimization of Lateral Swing Angles of Lunar Satellite for Region Multiple Strip Imaging Task Planning

LI Shixue^{1, 2,},
SHEN Xin^{1, 2, ,},
YAO Huang^{3, 4},
ZHANG Guo^{1, 2},
LIU Yulin^{1, 2}

1.
State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China
2.
Collaborative Innovation Center of Geospatial Technology, Wuhan 430079, China
3.
School of Educational Information Technology, Central China Normal University, Wuhan 430079, China
4.
School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, China

Funds:

The National Key Research and Development Program of China 2016YFB0500801

the National Natural Science Foundation of China 41501383

the National Natural Science Foundation of China 91538106

the National Natural Science Foundation of China 41501503

the National Natural Science Foundation of China 41601490

Fundamental Research Funds for the Central University 2042016kf0163

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Author Bio:
LI Shixue, postgraduate, majors in imaging task planning of remote sensing satellite. E-mail:shixueli@whu.edu.cn
Corresponding author:
SHEN Xin, PhD, associated professor. E-mail: xinshen@whu.edu.cn
Received Date: October 16, 2017
Published Date: April 04, 2019

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Abstract

Abstract

The lunar surface topography mapping is the basic work of the lunar exploration and plays an important role in the three-phase ("around-fall-back") lunar exploration program. In the "around" phase, it is necessary to use the camera carried by the spacecraft to acquire high-resolution image of area around the drop-off point. Due to the low orbit altitude and the limited field of view of camera, the width of the imagery obtained by the lunar satellite is relatively small compared to the range of the required drop-off area. Multiple strips stitching is an effective and practical way to solve large regional imaging problem. In a given multiple strips stitching task planning, it is required to optimize the side-swing angle of each orbit within a given mission duration to meet the regional coverage demand. To meet the requirements of region multiple strip stitched imaging task, an lateral swing optimization of method is proposed in this paper. Firstly, a fast algorithm based on vector polygon logical operation is proposed. Coverage polygons of each imaging strip are calculated based on the lateral swing angle, satellite orbit and the field of view of the sensor, then the coverage ratio can be computed via a Boolean operation between target polygon and strip coverage polygons. The proposed method of coverage ratio calculation can not only ensure the accuracy of calculation, but also can dramatically reduce its computation complexity. Secondly, a lateral swing angle optimization model for multiple strip stitching imaging task is introduced, which uses swing angle as decision valuables, coverage ration maximization as objective function respectively, and an improved adaptive genetic algorithm based on sigmoid function is proposed to solve the optimization model. Finally, two simulation experiments are executed to validate the validity of proposed method.
- region imaging,
- strip stitching,
- imaging task planning,
- lateral swing angle,
- optimization

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