罗克德洛斯穆查丘斯天文台的红外天文特征：可降水量统计
The Infrared Astronomical Characteristics of Roque de los Muchachos Observatory: precipitable water vapor statistics
摘要：
本文介绍了由全球定位系统（GPS）获得的Roque de los Muchachos天文台（ORM）上空的大气水汽含量。通过与940 nm辐射计观测值的比较，对GPS测量值进行了评价。GPS测量的统计分析点ORM作为一个观测站点，具有合适的条件，红外（IR）观测，可降水量（PWV）的中位数柱为3.8毫米。PWV呈现出明显的季节性行为，冬季和春季的最佳季节红外观测。2、3、4月夜间PWV值小于3mm的占60%以上。我们还估计了ORM水汽含量的时间变化。PWV的统计结果在不同的天文网站的摘要，回顾这些值是不直接可比的，因为所使用的技术来记录数据的差异。
英文摘要：
The atmospheric water vapor content above the Roque de los Muchachos Observatory (ORM) obtained from Global Positioning Systems (GPS) is presented. GPS measurements have been evaluated by comparison with 940nm-radiometer observations. Statistical analysis of GPS measurements points to ORM as an observing site with suitable conditions for infrared (IR) observations, with a median column of precipitable water vapor (PWV) of 3.8 mm. PWV presents a clear seasonal behavior, being Winter and Spring the best seasons for IR observations. The percentage of nighttime showing PWV values smaller than 3 mm is over 60% in February, March and April. We have also estimated the temporal variability of water vapor content at the ORM. A summary of PWV statistical results at different astronomical sites is presented, recalling that these values are not directly comparable as a result of the differences in the techniques used to recorded the data.
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