Spectral detection with high spectral resolution and high signal-to-noise ratio based on remote sensing monitoring

ZHANG Hang; ZHENG Yu-quan; WANG Wen-quan; LIN Chao; LIU Dong-bin

doi:10.3788/OPE.20152313.0229

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Spectral detection with high spectral resolution and high signal-to-noise ratio based on remote sensing monitoring

更新时间：2020-08-13

- Spectral detection with high spectral resolution and high signal-to-noise ratio based on remote sensing monitoring
- Optics and Precision Engineering Vol. 23, Issue 10z, Pages: 229-238(2015)
- 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,中国,130033
  2. 吉林大学物理学院,吉林长春,130012
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152313.0229
  CLC： O433.1;TP731
- Received：17 May 2015，
  
  Revised：13 June 2015，
  
  Published：14 November 2015
- 稿件说明：
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张航, 郑玉权, 王文全等. 基于遥感监测的高光谱分辨率与高信噪比光谱探测技术[J]. 光学精密工程, 2015,23(10z): 229-238

ZHANG Hang, ZHENG Yu-quan, WANG Wen-quan etc. Spectral detection with high spectral resolution and high signal-to-noise ratio based on remote sensing monitoring[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 229-238
张航, 郑玉权, 王文全等. 基于遥感监测的高光谱分辨率与高信噪比光谱探测技术[J]. 光学精密工程, 2015,23(10z): 229-238 DOI： 10.3788/OPE.20152313.0229.

ZHANG Hang, ZHENG Yu-quan, WANG Wen-quan etc. Spectral detection with high spectral resolution and high signal-to-noise ratio based on remote sensing monitoring[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 229-238 DOI： 10.3788/OPE.20152313.0229.

摘要

为了精确利用卫星遥感监测获取的CO

等温室气体的信息实现对CO

浓度的反演

研究了高光谱分辨率与高信噪比光谱探测技术。采用大耀斑角反射式平面衍射光栅作为分光元件设计了光学系统

对0.76

1.61

2.06

m 3个谱段实现了精细光谱分光。根据光学遥感探测理论

推导3个谱段的理论信噪比

揭示了光谱分辨率与信噪比之间的制约关系。选择大像元尺寸、高量子效率的探测器

通过像元合并以及盲元校正等方法

对小信号进行高信噪比探测。建立了一套精细光谱定标装置

分别测量3个谱段内各个光谱通道的线性函数

并进行高斯拟合

从而准确标定各通道的中心波长和半宽度。实验验证显示光谱分辨率可达0.04 nm

满足高光谱分辨率的光谱探测需求

为CO

浓度的精确反演奠定了技术基础。

Abstract

To invert precisely the CO

concentration in atmosphere by the green-house gas information obtained by satellite remote sensing

this paper researches the high spectral detection technology with high spectral resolution and high Signal-to-Noise Ratio(SNR). A method of fine spectrum splitting was demonstrated using a large area diffractive grating at three spectral bands of 0.76

1.61

2.06

m. According to the theory of remote sensing detection

the theoretical SNRs of the three bands were deduced to reveal the restrict relation between the spectral resolution and the SNR. The detectors with large pixel sizes and high quantum efficiency were selected to detect the weak signal with high SNR by using methods of pixel combination and blind pixel correction. A spectral calibration facility was established to measure the instrument line shapes(ILSs) of the three bands

and the center wavelength and the full-width at half maximum(FWHM) of each spectral channel were determined with a Gaussian fit to the core of each ILS. The results of the spectral calibration indicate that the spectral resolution is 0.04 nm. The above-mentioned study provides the basis for the realization of accurate detection of absorption spectra and 1-4×10

-6

reversion precision of CO

关键词

Keywords

references

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