该数据集包含了黑河水文气象观测网下游四道桥站的大孔径闪烁仪通量观测数据。下游架设一台BLS900型号的大孔径闪烁仪，北塔为接收端，南塔为发射端。观测时间为2017年1月1日至2017年12月31日。站点位于内蒙古额济纳旗，下垫面是柽柳、胡杨、裸地和耕地。北塔的经纬度是101.137E，42.008N，南塔的经纬度是101.131E，41.987N，海拔高度约为873m。大孔径闪烁仪的有效高度为25.5m，光径长度为2350m，采样频率是1min。
\n大孔径闪烁仪原始观测数据为1min，发布的数据为经过处理与质量控制后的数据，其中感热通量主要是结合自动气象站观测数据，基于莫宁-奥布霍夫相似理论通过迭代计算得到，主要的质量控制步骤包括：（1）剔除Cn2达到饱和的数据（Cn2>7.58E-14）；（2）剔除解调信号强度较弱的数据（Average X Intensity<1000）；（3）剔除降水时刻的数据；（4）剔除稳定条件下的弱湍流的数据（u*小于0.1m/s）。在迭代计算过程中，选取Thiermann and Grassl(1992)的稳定度普适函数。详细介绍请参考Liu et al(2011, 2013)。由于数据存储单元出现问题，2017年2月21日-3月5日,7月10日-8月18日大孔径闪烁仪数据缺测。
\n关于发布数据的几点说明：（1）数据缺失时刻由-6999标记。（2）数据表头：Date/Time ：日期/时间（格式：yyyy/m/d h:mm），Cn2 ：空气折射指数结构参数（单位：m-2/3），H_LAS ：感热通量（单位：W/m2）。数据时间的含义，如0:30代表0:00-0:30的平均；数据以*.xls格式存储。
\n水文气象网或站点信息请参考Li et al. (2013)，观测数据处理请参考Liu et al. (2011)。
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