The effects of the background moonlight in the nightglow photometry measured during the total lunar eclipse of 29/30 November, 1974

The effect of the background moonlight on the observation of two representative nightglow lines, [OI] 5577 and 6300 A lines, was studied during the total lunar eclipse of 29/30 November, 1974. It was found that when the distance between the moon and the direction of the photometer is 300 the measurement of the [OI] 6300 A line (--45 R) is possible on a night with moon age less than 4.7 days, and that when the distance is 500 the [OI] 6300 A (--25 R) is measurable on a night with moon age less than 5.7 days, and that the measurement of the [OI] 5577 A line (--300 R) is little affected by the background moonlight for the distance (D)>=300 for a night with moon age less than 4.7 days and for D>=500 for that less than 5.7 days. (auth.)