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水分子吸收光谱参数是遥感探测、行星观测应用领域所需的关键基础科学数据. 基于窄线宽外腔半导体激光器和长程吸收池, 测量了室温下9332—722 cm –1波段内, CO 2加宽的18条水分子的吸收谱线. 分别使用Voigt线型和quadratic speed-dependent Voigt线型对吸收光谱数据进行拟合, 并获得了这些谱线的CO 2加宽系数, quadratic speed-dependent Voigt线型表现出更好的拟合效果. 与HITRAN2020数据库该波段空气加宽系数进行了对比, 两种线型反演获得的水分子CO 2加宽系数与空气加宽系数之比的均值分别为1.327和1.454, 验证了利用水分子的空气加宽系数估算CO 2加宽系数的方法存在可靠性. 本研究可为近红外波段的火星、金星等大气结构探测技术及相关研究提供可供参考的实测光谱参数数据.The absorption spectral parameters of water vapor molecules are the key basic scientific data for the remote sensing detection and the planetary observation applications. Based on a narrow line-width external cavity diode laser and a long-path absorption cell, 18 absorption spectral lines of CO 2-broadened water vapor molecules in a 9332–9722 cm –1range at room temperature are measured. To obtain the CO 2-broadened water vapor molecule coefficients, the Voigt profile and the quadratic speed-dependent Voigt profile are used to fit the absorption spectrum data. The quadratic speed-dependent Voigt profile shows better fitting capability. Comparing with the air-broadened coefficients of the corresponding region from the HITRAN2020 database, the mean ratios of the CO 2-broadened coefficients of water vapor molecules and the air-broadened coefficients obtained from the two models of the line shape are 1.327 and 1.454, respectively, which verifies that the method of estimating the CO 2-broadened coefficient by the air-broadened coefficient of water vapor molecules has certain reliability. This study can provide reference data of measured spectral parameters for the detection technology and related research of atmospheric structures of Mars and Venus in the near-infrared region.
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$ {\nu }_{0}/{\rm cm}^{-1}$CO2加宽系数$/({\mathrm{c}\mathrm{m} }^{-1}{\cdot}{\mathrm{a}\mathrm{t}\mathrm{m} }^{-1})$ 空气加宽系数/
$({\mathrm{c}\mathrm{m} }^{-1}{\cdot}{\mathrm{a}\mathrm{t}\mathrm{m} }^{-1})$比值 VP qSDVP $ {\gamma }_{\mathrm{H}\mathrm{I}\mathrm{T}\mathrm{R}\mathrm{A}\mathrm{N}}^{\mathrm{A}\mathrm{I}\mathrm{R}} $ $\dfrac{{\gamma }_{1}^{ {\mathrm{C}\mathrm{O} }_{2} }}{\gamma _{\mathrm{H}\mathrm{I}\mathrm{T}\mathrm{R}\mathrm{A}\mathrm{N} }^{\mathrm{A}\mathrm{I}\mathrm{R} }}\Big/{\text{%} }$ $\dfrac{{\gamma }_{0}^{ {\mathrm{C}\mathrm{O} }_{2} }}{\gamma _{\mathrm{H}\mathrm{I}\mathrm{T}\mathrm{R}\mathrm{A}\mathrm{N} }^{\mathrm{A}\mathrm{I}\mathrm{R} }}\Big/{\text{%} }$ $\dfrac{{\gamma }_{0}^{ {\mathrm{C}\mathrm{O} }_{2} }}{{\gamma }_{\mathrm{V}\mathrm{P} }^{ {\mathrm{C}\mathrm{O} }_{2} }}\Big/{\text{%} }$ $ {\gamma }_{1}^{{\mathrm{C}\mathrm{O}}_{2}} $ $ {\gamma }_{0}^{{\mathrm{C}\mathrm{O}}_{2}} $ $ {\gamma }_{2}^{{\mathrm{C}\mathrm{O}}_{2}} $ 9332.623 0.079(0.42) 0.093(1.86) 0.020(6.8) 0.0483 1.632 1.917 1.175 9335.691 0.107(0.58) 0.111(2.76) 0.013(18.7) 0.0772 1.391 1.441 1.036 9339.709 0.083(0.74) 0.100(4.95) 0.007(20.0) 0.0732 1.135 1.361 1.199 9344.263 0.084(0.69) 0.097(2.51) 0.016(7.07) 0.0573 1.468 1.685 1.148 9346.912 0.095(0.66) 0.102(1.61) 0.026(6.92) 0.0762 1.247 1.341 1.076 9351.149 0.072(0.18) 0.079(1.37) 0.005(9.63) 0.0623 1.153 1.274 1.105 9351.509 0.082(1.14) 0.092(4.00) 0.004(12.05) 0.0804 1.014 1.150 1.134 9366.591 0.084(0.18) 0.085(1.27) 0.018(17.27) 0.0602 1.394 1.418 1.017 9366.781 0.082(0.40) 0.089(2.40) 0.089(2.40) 0.0565 1.451 1.568 1.081 9388.751 0.085(0.96) 0.094(2.58) 0.015(9.77) 0.0637 1.328 1.472 1.108 9388.968 0.096(0.56) 0.102(3.35) 0.069(18.15) 0.0791 1.212 1.294 1.067 9409.130 0.086(0.41) 0.089(1.92) 0.010(12.02) 0.0713 1.205 1.245 1.034 9412.790 0.122(1.30) 0.133(3.37) 0.019(6.05) 0.0817 1.489 1.625 1.092 9676.881 0.068(0.32) 0.073(1.60) 0.016(11.04) 0.0473 1.446 1.552 1.073 9694.811 0.083(0.28) 0.098(2.41) 0.031(9.83) 0.0628 1.323 1.560 1.180 9713.959 0.094(0.69) 0.099(2.72) 0.024(11.35) 0.0726 1.294 1.370 1.059 9720.277 0.114(0.51) 0.118(3.86) 0.027(7.39) 0.0831 1.367 1.421 1.040 9721.806 0.094(0.20) 0.104(1.15) 0.024(8.58) 0.0704 1.338 1.477 1.104 -
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