Ground transmission and emission intensity of the O2 1.27-micron nightglow

The transmission of the O2 1.27-micron airglow to the ground is determined by coordinated measurements of a filter radiometer on board the S-310-16 rocket and a ground-based grating monochrometer. The inferred transmission of 6.3 + or - 3.4 percent for a zenith direction is in good agreement with the calculated value of 6.5 percent by Evans et al. (1970). The zenith intensity of the 1.27-micron nightglow is deduced to be 58 + or - 14 kR, which is consistent with the rocket experimental result obtained by Evans et al. (1972).