Science. 1972 May 19;176(4036):793-4. doi: 10.1126/science.176.4036.793.
Stellar ultraviolet light transmitted through the earth's upper atmosphere is strongly absorbed by ozone and molecular oxygen. The stellar ultraviolet photometers aboard the Orbiting Astronomical Observatory (OAO-2) satellite have measured the intensity changes of several stars during occultation of the star by the earth's atmosphere. From the occultation data the nighttime vertical number density profiles of molecular oxygen at altitudes from 120 to 200 kilometers and of ozone at altitudes from 60 to 100 kilometers have been obtained.
恒星紫外线穿过地球高层大气时会被臭氧和氧气分子强烈吸收。轨道天文观测卫星（OAO-2）上的恒星紫外线光度计在恒星被地球大气掩食期间测量了若干恒星的强度变化。根据掩食数据，已经得到了从 120 到 200 公里高度的氧气分子和从 60 到 100 公里高度的臭氧的夜间垂直数密度分布。
