Observations of Airglow O2(1-sigma) Atmospheric Band at 8645 A and the Rotational Temperature at 23 Deg S

摘要

Regular observations of the O2 (1Sigma, 0 to 1) atmospheric band at 8645A (02A) and the rotational temperature, together with the OH(9,4) band and OI 5577A airglow emissions, using multichannel tilting filter type photometers, have been carried out at Cachoeira Paulista (22.7 deg D, 45. 0 deg. W) Brazil, since February 1983. The O2A band intensities occasionally vary from 200 to 1000 Rayleighs during a night. Covariations in nocturnal and seasonal variation with the OI 5577A emissions were observed. The rotational temperatures determined from the P branch of the O2 (1 sigma) vary between 180 and 230 K. The amplitude of the noctural temperature variation is frequently larger than that determined from the OH emission, and the phase of the variation, on some occasions, leads that of the OH.