[[spi:math]] (39) [[spi:math]] (40) Process (39) is follow[de] by [[spi:math]] (41) which is sufficiently exothermic to electronically excite either product. Process (40) is immediately followed by the dissociative recombination reaction [[spi:math]] (42) in which one or both of the oxygen atoms may be excited and capable of radiating at either 5577 [[spi:math]] and 6300 [[spi:math]]. It is difficult to assess the impact of this source of airglow modification not only because we do not know the exact level of thermal modification without integrating the results of various heat sources associated with SPS injections but also because the oxygen (red and green) regions of the spectrum do not seem to extensively interfere with present space systems. A test example can be cited in the case of SAR arcs (stable auroral red) which are stimulated by similar thermal processes at the atmospheric footprints of the plasmapause. Satellite measurements of electron temperature near the plasmapause indicate temperatures of ~ 104°K (! 1 eV). As far as we can determine SAR arcs do not seem to impact optical earth-sensor systems. 35
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