# ATMOSPHERIC WATER VAPOR ABSORPTION AT 1.3 $\mu m^{*}$

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 dc.creator Bragg, S. L. en_US dc.creator Kelley, J. D. en_US dc.date.accessioned 2006-06-15T14:56:20Z dc.date.available 2006-06-15T14:56:20Z dc.date.issued 1985 en_US dc.identifier 1985-TA-7 en_US dc.identifier.uri http://hdl.handle.net/1811/12211 dc.description $^{*}$ This work was supported by Air Force Weapons Laboratory Contract F29601-82-C-0019. en_US dc.description Author Institution: McDonnell Douglas Research Laboratories; McDonnell Douglas Research Laboratories en_US dc.description.abstract Absorption spectra of water vapor and water vapor broadened by air have been measured at the frequency of the atomic iodine transition at 1.3 $\mu m (7603.14 cm^{-1})$. The absolute absorption cross section at $7603.14 cm^{-1}$ has been determined for each spectrum. The absorption cross section for 2 kPa of water vapor in 100 kPa air is $1.1 (\pm 0.2)\times 10 cm^{-24}$ at $7603.14 cm^{-1}$. All absorption at this frequency is attributed to the wings of nearby water vapor lines. A theoretical model, based on pressure broadening coefficients determined in this study, yields a simple expression for the absorption cross section at $7603.14 cm^{-1}$. $\sigma = 5.0 \times 10^{-26}(p_{H_{2}0} + 0.25 p_{air})$ with p the pressure in kPa, and the cross section $\sigma$ in $cm^{2}$. en_US dc.format.extent 82599 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title ATMOSPHERIC WATER VAPOR ABSORPTION AT 1.3 $\mu m^{*}$ en_US dc.type article en_US