“2015IOAA理论短问题第6题-大气光深”的版本间的差异
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2022年3月18日 (五) 20:29的最新版本
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, $$\tau_{z}$$.
