Abstract
We present time averaged spectra of the extreme ultraviolet nightglow in the 350 to 1400‐Å range at 8‐Å resolution. The uplooking spectrum is dominated by geocoronal and interplanetary resonantly scattered solar lines (HI 1216, HI 1026, O II 834, and He I 584 Å). The downlooking spectrum contains OI emission features from the nighttime ionosphere, including several previously unobserved features. In contrast to previously reported observations, no significant N2 Lyman‐Birge‐Hopfield emissions are evident in our data, and a 2‐σ upper limit of 135 R can be placed on this radiation for the time of our observations.
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