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	<title>2015IOAA理论短问题第6题-大气光深 - 版本历史</title>
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	<updated>2026-05-05T08:09:55Z</updated>
	<subtitle>本wiki的该页面的版本历史</subtitle>
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		<id>https://www.astro-init.top/index.php?title=2015IOAA%E7%90%86%E8%AE%BA%E7%9F%AD%E9%97%AE%E9%A2%98%E7%AC%AC6%E9%A2%98-%E5%A4%A7%E6%B0%94%E5%85%89%E6%B7%B1&amp;diff=2172&amp;oldid=prev</id>
		<title>某九流辣鸡民科：创建页面，内容为“==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 E…”</title>
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		<updated>2022-03-18T12:29:59Z</updated>

		<summary type="html">&lt;p&gt;创建页面，内容为“==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 E…”&lt;/p&gt;
&lt;p&gt;&lt;b&gt;新页面&lt;/b&gt;&lt;/p&gt;&lt;div&gt;==英文题目==&lt;br /&gt;
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, $$\tau_{z}$$.&lt;/div&gt;</summary>
		<author><name>某九流辣鸡民科</name></author>
		
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