Absolute Phase Drift Analysis and Correction of Asymmetric Spatial Heterodyne Interferometer for Wind Detection

Jing, 沈静 Shen; Wei, 熊伟 Xiong; Hailiang, 施海亮 Shi; Haiyan, 罗海燕 Luo; Zhiwei, 李志伟 Li; Guangxiao, 胡广骁 Hu; Xuejing, 方雪静 Fang; Biao, 徐标 Xu

doi:10.3788/aos201737.0430003

Cited by 1 publication

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“…Before the GMI payload launched, absorption spectrum testing experiments were conducted using specialized equipment, such as hyperspectral resolution calibration equipment and an atmospheric environment simulation calibration chamber [27,28]. The experimental equipment is shown in Figure 5.…”

Section: The Ilsf Absorption Cell Test Validationmentioning

confidence: 99%

Research on Calculation Method of On-Orbit Instrumental Line Shape Function for the Greenhouse Gases Monitoring Instrument on the GaoFen-5B Satellite

Han,

Shi,

Luo

et al. 2024

Remote Sensing

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The Greenhouse Gases Monitoring Instrument is based on the spectroscopic principle of spatial heterodyne spectroscopy technology and has the characteristics of no moving parts, a hyperspectral resolution, and a large luminous flux. The instrumental line shape function is one of the most important parameters characterizing the features of the instrument, and it plays a vital role in the system error analysis of the instrument’s measurements. To accurately obtain the instrumental line shape function of a spatial heterodyne spectrometer during the on-orbit period and improve the accuracy of gas concentration retrieval, this study develops a method to model and characterize the characteristics of the instrumental line shape function, including modulation loss and phase error. This study employs the solar calibration spectrum in the 1.568–1.583 μm bands to conduct iterative calculations of the instrumental line shape function error model. After the instrumental line function is updated, the average relative deviation is reduced from 1.83% to 0.756% between the theoretical and measured solar spectra. Additionally, the average relative deviation is reduced from 7.049% to 2.106% between the GMI nadir and theoretical nadir spectra. The findings demonstrate that updating the instrumental line shape function mitigates the impact of variations in the spectrometer’s instrumental line shape due to alterations in the orbital environment. This study offers a dependable reference for both the enhancement and oversight of a spectrometer’s instrumental line shape function, along with an investigation of shifts in instrument parameters.

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Section: The Ilsf Absorption Cell Test Validationmentioning

confidence: 99%