Study for Signal-to-Noise Ratio of Spatial Heterodyne Spectrometer

Haiyan, 罗海燕 Luo; Wei, 熊伟 Xiong; Hailiang, 施海亮 Shi; Zhiwei, 李志伟 Li

doi:10.3788/aos201737.0612001

Cited by 3 publications

(1 citation statement)

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“…And in the following years, high-precision measurements of atmospheric wind fields were achieved on ground-based and airborne detectors [6][7][8]. As a result, DASH spectroscopy technique has begun to receive significant attention and active expansion from researchers in related fields [9][10][11][12][13][14][15][16][17]. In the initial DASH spectral velocimetry theory, it introduced measuring the phase shift of interference fringes to reverse the Doppler velocity difference, but did not explain the implementation mechanism and constraint conditions of obtaining high measurement accuracy using interferometric phase measurement method.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Velocimetry Processing Method Based on Doppler Asymmetric Spatial Heterodyne Spectrometer

Peng,

Liu,

Tian

et al. 2024

IEEE Photonics J.

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Section: Introductionmentioning

confidence: 99%

Analysis of Velocimetry Processing Method Based on Doppler Asymmetric Spatial Heterodyne Spectrometer

Peng,

Liu,

Tian

et al. 2024

IEEE Photonics J.

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Data processing and performance evaluation of a tempo-spatially mixed modulation imaging Fourier transform spectrometer based on stepped micro-mirror

Zhao¹,

Lv²,

Ren³

et al. 2020

Opt. Express

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A novel tempo-spatially mixed modulation imaging Fourier transform spectrometer based on a stepped micro-mirror has the advantages of high throughput, compactness, and stability. In this paper, we present a method of image- and spectrum-processing and performance evaluation, which is utilized to obtain a high-quality reconstructed image without stitching gaps and a reconstructed spectrum with significantly reduced noise and side-lobe oscillation. A theoretical model of instrument line shape and signal-to-noise ratio is established to verify the effectiveness of non-uniformity sampling correction and spectral resolution enhancement. Meanwhile, the performance of the instrument was evaluated combined with experimental results.

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Greenhouse Gases Monitoring Instrument on GaoFen-5 Satellite-II: Optical Design and Evaluation

Luo

et al. 2023

Remote Sensing

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The Greenhouse gases Monitoring Instrument on GaoFen-5 satellite-II (GMI-II) uses spatial heterodyne spectroscopy (SHS) for quantitative monitoring of atmospheric greenhouse gases (GHG). Unlike the traditional SHS, the interferometer component of the GMI-II was designed with zero optical path difference offset, effectively improving spectral resolution while maintaining the same detector specifications. The secondary imaging system with non-isometric scaling of spatial and spectral dimensions was designed to decrease the integration time of a frame image or improve the spectral signal-to-noise ratio (SNR) under the same integration time. This paper introduces the design, manufacture, adjustment methods, and test results of the main performance indexes of the GMI-II that indicate that the spectral resolution of the O2 A-band detection channel is better than 0.6 cm−1 and other channels are better than 0.27 cm−1. Under the typical radiance of other carbon monitors’ on-orbit statistics, the spectral SNR of the GMI-II is more than 300. These test results demonstrate that the GMI-II can be well adapted to quantitative remote sensing monitoring of atmospheric GHG.

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Study for Signal-to-Noise Ratio of Spatial Heterodyne Spectrometer

Cited by 3 publications

References 0 publications

Analysis of Velocimetry Processing Method Based on Doppler Asymmetric Spatial Heterodyne Spectrometer

Analysis of Velocimetry Processing Method Based on Doppler Asymmetric Spatial Heterodyne Spectrometer

Data processing and performance evaluation of a tempo-spatially mixed modulation imaging Fourier transform spectrometer based on stepped micro-mirror

Greenhouse Gases Monitoring Instrument on GaoFen-5 Satellite-II: Optical Design and Evaluation

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