Rocketborne interferometer measurement of infrared auroral spectra

Abstract Short- and mid-wavelength infrared auroral spectra in the range from 1300 to 4000 cm−1 (7.7 to 2.5 μm) have been obtained with a rocketborne. cryogenic, field-widened interferometer at an unapodized resolution of 1.08 cm−1. Spectra were obtained at altitudes ranging from 89 to 135 km with a NESR of 63 R per cm−1 (2 × 10−13 W cm−2 sr−1 cm). Synthetic spectra provided identification of many prominent molecular bands in the region, including the Δυ = 1 sequence of nitric oxide (NO) near 5.4 μm, the carbon monoxide (CO) fundamental near 4.7 μm, strong emissions due to carbon dioxide (CO2) which overlap the weak Δυ = 1 sequence of ionized nitric oxide (NO+ ) near 4.3 μm, and the Δυ = 1 sequence of hydroxyl (OH) in the 2.8 μm region of the spectra. In addition, several band heads from the NO Δυ = 1 sequence have been identified and these suggest a highly non-thermal production source of the high lying rotational levels of NO. The data, synthetic spectra, absolute intensities, the rotational temperatures of many of the dominant molecular band emitters are presented and are compared to earlier, low resolution results.

[1]  D. Baker,et al.  Infrared prism interferometer spectrometer using a gas-lubricated drive bearing , 1974 .

[2]  John C. Polanyi,et al.  Mechanism of Rotational Relaxation , 1972 .

[3]  M. Rees,et al.  Time dependent studies of the aurora—I. Ion density and composition , 1973 .

[4]  R. P. Lowe,et al.  Vibrational population distribution in the hydroxyl night airglow , 1983 .

[5]  A. T. Stair,et al.  Evidence for an OH≠ N2≠ CO2(ν3) → CO2 +hν (4.3 μm) mechanism for 4.3-μm airglow , 1978 .

[6]  T. Degges.  Vibrationally excited nitric oxide in the upper atmosphere. , 1971, Applied optics.

[7]  J. V. Vleck.  On sigma-Type Doubling and Electron Spin in the Spectra of Diatomic Molecules , 1929 .

[8]  A. Despain,et al.  Extended-field large-aperture interferometer-spectrometer for airglow surveys. , 1971, Applied optics.

[9]  K. D. Baker,et al.  Measurements of 1.5- to 5.3-µm infrared enhancements associated with a bright auroral breakup , 1977 .

[10]  F. Mies.  Calculated vibrational transition probabilities of OH(X2Π) , 1974 .

[11]  B. Gordiets,et al.  I.R. Radiation of the upper atmosphere , 1978 .

[12]  A. T. Stair,et al.  Rocket-borne measurements of atmospheric infrared fluxes , 1985 .

[13]  J. Polanyi,et al.  Energy Distribution Among Reaction Products: H + SCl(2) ? HCl + SCl. , 1971, Applied optics.

[14]  B. Green,et al.  Nitric oxide chemiexcitation occurring in the reaction between metastable nitrogen atoms and oxygen molecules , 1978 .

[15]  J. Cashion.  Vibration—Rotation Interaction Factors for Diatomic Molecules Calculated by Numerical Methods , 1964 .

[16]  A. T. Stair,et al.  Infrared emission from NO (Δυ=1) in an aurora: Spectral analysis and kinetic interpretation of HIRIS measurements , 1981 .

[17]  A. Mulac,et al.  Temperatures from rotational-vibrational raman Q-branches , 1979 .

[18]  A. T. Stair,et al.  Auroral nitric oxide concentration and infrared emission , 1982 .

[19]  G. Caledonia,et al.  NO infrared radiation in the upper atmosphere , 1982 .