The LVLASO I/O Concentrator Software Description

This paper describes the software written for the VO Concentrator Unit in support of the Low Visibility Landing and Surface Operations (LVLASO) experiment flown on-board NASA's Boeing 757 aircraft

INFRARED SPECTRUM OF ACETYLENE∗ACETYLENE^{*}

$^{*}$ Supported by U.S. Atomic Energy Commission.Author Institution: Physics Department, The Pennsylvania State University; Physics Department, National Bureau of StandardsThe infrared absorption spectrum of $C_{2}H_{2}$ has been studied in the region from 2500 to $4150 cm^{-1}$. Nineteen bands were observed of which eleven were sufficiently intense and well resolved to permit rotational analysis. Five bands involving the ground vibrational state were analysed giving the rotational constants $B_{0} = 1.17654 \pm 0.00004$ and $D_{0} = 1.51\pm 0.03 \times 10^{-6}$ $cm^{-1}$. The \emph{l}-doubling constants for the degenerate modes were determined to be $q_{4}=5.2_{7}, q_{5}=4.6_{3} \times 10^{-3}$ $cm^{-1}$. The rotational constants determined for the various observed states clearly show that additional data will be needed and due account taken of resonances to obtain a satisfactory set of rotational constants. The use of difference bands involving the $v_{1} = 1$ level permits the determination of the vibrational frequency of that level to be $612.88 cm^{-1}$

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