In-lab calibration of space-borne differential optical absorption spectrometer

Minjie, 赵敏杰 Zhao; Fuqi, 司福祺 Si; Yu, 江宇 Jiang; Haijin, 周海金 Zhou; Shimei, 汪世美 Wang; Wenqing, 刘文清 Liu

doi:10.3788/ope.20132103.0567

Cited by 2 publications

(1 citation statement)

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“…This requires large-aperture Lambertian sources to provide known radiance levels, with the absolute calibration traceable to primary standards [2]. The current expanded uncertainty (k = 2) in the radiometric calibration of the source used for the EMI sensor is 5.64% [3]. An integrating sphere source with an inner diameter of 2.2 m, an exit aperture of 0.8 m, and a radiance above 1.86 μW (cm −2 nm −1 sr −1 ) at 250 nm is required.…”

Section: Introductionmentioning

confidence: 99%

Spectral radiance standard transfer for an integrating sphere as a radiation source in the ultraviolet band

Chen

Zhang

et al. 2022

Metrologia

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We developed a new source, having uniform spectral radiance, for a large-aperture UV integrating sphere with pressed polytetrafluoroethylene coating. Since lamp panel systems have high uncertainty due to a low signal-to-noise ratio at 250 nm, to transfer the spectral radiance scale from 250 to 350 nm to the source, we developed and calibrated a filter radiometer based on a solar blind phototube. The spectral radiance was obtained via a model of the source and a recursive estimation of the model parameters. A standard FEL lamp validated the usage of the filter radiometer. Finally, the filter radiometer to calibrate the new source. The results show that the radiance of the source at 250 nm is five times the top-of-the-atmosphere spectral irradiance, and the expanded uncertainty is 4.7%.

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Section: Introductionmentioning

confidence: 99%

Spectral radiance standard transfer for an integrating sphere as a radiation source in the ultraviolet band

Chen

Zhang

et al. 2022

Metrologia

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Preflight Evaluation of the Performance of the Chinese Environmental Trace Gas Monitoring Instrument (EMI) by Spectral Analyses of Nitrogen Dioxide

Zhang

Liu

Wang

et al. 2018

IEEE Trans. Geosci. Remote Sensing

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The Environmental trace gas Monitoring Instrument (EMI) onboard the Chinese high-resolution remote sensing satellite GaoFen-5 is an ultraviolet-visible imaging spectrometer, aiming to quantify the global distribution of tropospheric and stratospheric trace gases and planned to be launched in spring 2018. The preflight calibration phase is essential to characterize the properties and performance of the EMI in order to provide information for data processing and trace gas retrievals. In this paper, we present the first EMI measurement of nitrogen dioxide (NO 2) from a gas absorption cell using scattered sunlight as the light source by the differential optical absorption spectroscopy technique. The retrieved NO 2 column densities in the UV and Vis wavelength ranges are consistent with the column density in

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In-lab calibration of space-borne differential optical absorption spectrometer

Cited by 2 publications

References 0 publications

Spectral radiance standard transfer for an integrating sphere as a radiation source in the ultraviolet band

Spectral radiance standard transfer for an integrating sphere as a radiation source in the ultraviolet band

Preflight Evaluation of the Performance of the Chinese Environmental Trace Gas Monitoring Instrument (EMI) by Spectral Analyses of Nitrogen Dioxide

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