The nightglow emissions of OH and O_2 have been observed in the near infrared region (1-2μ) by balloons and rockets. The data show that the height of the maximum emission rate and the effective thickness of emission layer for OH are 85-90 km and 10 km respectively, and for O_2, 90 km and 10 km respectively. The intensities of OH (3-1,4-2) and (6-4,7-5) bands show a steady decrease during the night; the OH intensity at 04:00 JST is about 30 % of that at 23:00 JST. 6 hours after local ground sunset.
夜光OH, O_2の近赤外域での測定
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