2015IOAA理论短问题第6题-大气光深

	需要解答 本题目目前没有解答。要不要你来试试！

英文题目

At the start of every observation, a radio telescope is pointed at a point-source calibrator that has a known flux density of 21.86 Jy outside the Earth’s atmosphere. However, on a certain date, the measured flux density of the calibrator source was 14.27 Jy. If the calibrator source was at an altitude of 35 degrees, estimate the zenith atmospheric optical depth, $$\tau_{z}$$.

中文翻译

每次观测开始时，射电望远镜都会对准一个点源校准源；已知该校准源在地球大气层外的流量密度为 21.86 央斯基（Jy）。但在某一日，测得该校准源的流量密度仅为 14.27 央斯基。若该校准源的地平高度为 35°，试估算天顶方向大气光学深度$$\tau_{z}$$

分类：热学