The night airglow O2(1-Sigma) atmospheric band at 8645A and the rotational temperature observed at 23 deg S

The O2 measurements of atmospheric band at 8645A and the rotational temperature together with OI5577A, NaD and OH(9,4) band emissions were recorded. Multichannel tilting filter type photometers were used. The O sub 2 band intensities occasionally vary from 200 Rayleighs to 1000 Rayleighs during a night. Covariations with OI5577A emissions were observed. The rotational temperature determined from the P-branch of the O sub 2 measurement vary between 180 K and 230 K. The amplitude of the nocturnal temperature variations is frequently larger than that derived from the OH emission, and the phase of the variation normally leads that of the OH. It is observed on some nights that the temperature variations of both the emissions are out of phase, which suggests a vertical phase propagation of the atmospheric wavelike perturbations.