• 作者： 何紹堯; 吳維申
• 作者服務機構： 中山科學研究院
• 中文摘要： 本研究以實驗室超熱蒸汽吸收光譜來比較理論光譜，以驗證 AFCRL 大氣吸收光譜參數在大氣紅外線窗洞區之可靠性。利用600°C超熱蒸汽吸收光譜比較3 -5 及8 -14 波長區之計算光譜。600°C 水分子計算光譜則採用 AFCRL 吸收參數，經 Lorentz 窄縫函數修正計算而成。結果顯示8 -14 區相當符合；3 -5 區之2000-2280 cm 波段譜線位置與強度幾乎全同，顯示 AFCRL 參數可靠性與本模擬光譜相當成功。但 2400-2480 cm 及2750-2900 cm 二熱差波段，計算光譜離實驗光譜甚遠，故水分子理論光譜尚有修正之必要。
• 英文摘要： The AFCRL atmospheric absorption lineparameters has been used extensively in variousspectroscopic applications. The reliability ofpractical application depends ultimately on theaccuracy of the line parameters tabulated on theARCRL listing. Synthetic absorption spectra ofwater vapor at 600°C in the wavelength rangesof 3-5 and 8-14 have been calculated byusing the line parameters in the AFCRL linelisting and by assuming the lines have Lorentzianshape. The monochromatic transmittance wereconvolved with a triangular slit function andthe final transmittance were obtained for spectralpositions with the same spacing as a laboratoryspectra. For comparision we have made useof the laboratory spectra of superheated steamat 600°C which provides conditions for theobservation of H O molecular absorption possiblein these atmospheric window regions. The ac-curacies of the spectral line positions of thecalculated spectra were excellent, especially inthe 2000-2280 cm region. However, spectralpositions and transmittance of the computedspectra in the hot difference bands of 2400-2480cm and 2750-2900 cm were poor as comparedwith laboratory spectra. This may present asituation for further theoretical spectroscopicimprovement.
• 中文關鍵字： --
• 英文關鍵字： --