Abstract
An observation of the ultraviolet nightglow between 2670 Å and 3040 Å was conducted over White Sands Missile Range on October 22, 1984, at 0020 hours LST during the Orionids meteor shower. A 1/4‐meter uv spectrometer operating at 3.5 Å resolution viewed the Earth's limb at tangent heights between 90 km and 110 km for 120 seconds. By inverting the observed limb intensities, a total zenith intensity of 1.4 kR is inferred for the Herzberg I system. Excess emission above the Herzberg I (7,3) band at 2852 Å is identified as the Mg I resonance line. The intensity ratio of the Herzberg I band system to the 2972 Å line from O(¹S) was less than that predicted from the accepted O(¹S) branching ratio and acceptable ratios of Herzberg I to 5577Å emissions. Arguments supporting the identification of the Herzberg III band system are also advanced.
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