Signal to noise ratio analysis of solar Hα space telescope

Zhi-peng CAI; Xing-xiang ZHANG; Zhe CHEN; Guo-ling BI

doi:10.37188/YJYXS20203508.0845

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Signal to noise ratio analysis of solar Hα space telescope

Driving Circuits | 更新时间：2020-08-11

- Signal to noise ratio analysis of solar Hα space telescope
- Chinese Journal of Liquid Crystals and Displays Vol. 35, Issue 8, Pages: 845-851(2020)
- 作者机构：
  
  1.中国科学院长春光学精密机械与物理研究所, 吉林长春 130033
  2.中国科学院大学, 北京 100049
- 作者简介：
- 基金信息：
  
  National Key Research and Development Program Project(2016YFB0500100);Civil Space Pre-research Program Project(D040101)
- DOI：10.37188/YJYXS20203508.0845
  CLC： TP394.1;TH691.9
- Received：03 December 2019，
  
  Revised：16 March 2020，
  
  Accepted：16 March 2020，
  
  Published：2020-08
- 稿件说明：
移动端阅览
Zhi-peng CAI, Xing-xiang ZHANG, Zhe CHEN, et al. Signal to noise ratio analysis of solar Hα space telescope[J]. Chinese journal of liquid crystals and displays, 2020, 35(8): 845-851.
DOI：

Zhi-peng CAI, Xing-xiang ZHANG, Zhe CHEN, et al. Signal to noise ratio analysis of solar Hα space telescope[J]. Chinese journal of liquid crystals and displays, 2020, 35(8): 845-851. DOI： 10.37188/YJYXS20203508.0845.

摘要

太阳Hα空间望远镜是国际上首次实现全日面Hα单色像（包括Hα线心和线翼3个波段）的空间观测望远镜，对太阳物理研究有着重要的意义。信噪比是定量评价空间望远镜成像质量和工作稳定性的重要指标，因此信噪比的计算和估计对太阳Hα空间望远镜的研制和使用至关重要。本文从太阳Hα空间望远镜工作原理和能量传递的角度出发，建立了信噪比计算模型，推导了信噪比计算公式。在此基础上计算了信噪比以及曝光时间区间，给出了最佳工作状态下单像元和像元合并情况下曝光时间分别为5 ms和10 ms。实验结果表明，计算值和测量值误差在1%以内，由此可以验证该信噪比计算模型的准确性和实用性。

Abstract

The solar Hα space telescope is the first space observation telescope to realize the full-surface Hα monochromatic image in the world (including the three bands of Hα core and wire wing)

which is of great significance for solar physics research. The signal-to-noise ratio (SNR) is an important index for quantitative evaluation of imaging quality and working stability of space telescope

so it is very important to calculate and estimate SNR for the development and use of solar Hα space telescope. The calculation model of the signal-to-noise ratio is established and the formula is derived according to the principle of the solar Hα space telescope and the way of energy transfer. On this basis

the interval of the signal-to-noise ratio and the exposure time is calculated

and the exposure time of the single pixel in the best working condition is 5 ms

and the exposure time of the pixel combination is 10 ms. It has been experimentally verified that the calculated and measured values are within one percent of the error. This can verify the accuracy and practicability of the signal-to-noise ratio calculation model.

关键词

Keywords

references

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