Star image filling based on stellar image point trajectory

Xian-yi LIU; Zhi-li ZHANG; Zhao-fa ZHOU; Zhen-jun CHANG

doi:10.3788/OPE.20192705.1229

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Star image filling based on stellar image point trajectory

Information Sciences | 更新时间：2020-08-13

- Star image filling based on stellar image point trajectory
- Optics and Precision Engineering Vol. 27, Issue 5, Pages: 1229-1235(2019)
- 作者机构：
  
  火箭军工程大学，陕西西安 710025
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20192705.1229
  CLC： V448.22
- Received：04 December 2018，
  
  Accepted：07 January 2019，
  
  Published：15 May 2019
- 稿件说明：
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Xian-yi LIU, Zhi-li ZHANG, Zhao-fa ZHOU, et al. Star image filling based on stellar image point trajectory[J]. Optics and precision engineering, 2019, 27(5): 1229-1235.
DOI：

Xian-yi LIU, Zhi-li ZHANG, Zhao-fa ZHOU, et al. Star image filling based on stellar image point trajectory[J]. Optics and precision engineering, 2019, 27(5): 1229-1235. DOI： 10.3788/OPE.20192705.1229.

摘要

数字天顶仪是一种通过拍摄星图进行定位的天文仪器，在采用数字天顶仪拍摄星图时，由于云层等外部因素会导致拍摄的星图存在星点缺失，直接影响到仪器的定位精度。为了提高仪器的实用性和对环境的适应性，本文推导了恒星像点轨迹，并提出了一种基于恒星像点轨迹的星图填补方法，该方法构建了缺失星图与相邻两幅星图之间的像点填补模型。实验数据表明，采用该方法能够对星图进行较好地填补，通过填补后的星图解算的定位误差在0.01″以内，使定位精度基本保持了不变。

Abstract

Digital zenith camera is an astronomical instrument which is used to locate by taking star images. When taking a star image

there are star points missing in the star image due to external factors such as clouds

and the accuracy of positioning will be affected directly. In order to improve the practicability of the instrument and its adaptability to the environment

the stellar image point trajectory is derived and a star image filling method based on stellar image point trajectory is proposed. This method constructs a filling model between the missing star image and the adjacent two star images. The experimental data shows that the method can better fill the star image. The positioning error calculated by the filled star image is less than 0.001″. The positioning accuracy remains unchanged.

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references

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