Spectroscopy of the EUV (350–1400 Å) nightglow


  • Supriya Chakrabarti,

  • Randy Kimble,

  • Stuart Bowyer


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.