Doppler Widths of the Atomic Oxygen Lines in the Airglow.

The widths of the forbidden atomic oxygen lines in the airglow have been measured, using a FabryPerot interferometer, and temperatures of the emitting layers have been inferred The lines 5577 in the night sky and X 6300 in the twilight, the aurora, and the night sky yielded temperatures of 184 , 710 , 730 , and 9800 K, respectively, with mean-square errors of about 10 per cent. Corresponding tenta - tive heights of the emitting layers have been suggested as 100, 205, 210, and 270 km.