%0 Dataset %T Daily data set of NOx at Shangdianzi atmospheric background watch station in Beijing in 2018 %J National Cryosphere Desert Data Center %I National Cryosphere Desert Data Center(www.ncdc.ac.cn) %U http://www.ncdc.ac.cn/portal/metadata/6d39b05b-1c5b-4a90-9d18-63ee1798aa5b %W NCDC %R 10.12072/ncdc.sdzraw.db2939.2023 %A Zhou Huaigang %K Nitrogen oxides;Shangdianzi;atmospheric background %X For the minute NOx concentration data collected at Shangdianzi station in 2018, firstly, the observer level quality control is carried out; secondly, the hour data is generated by expert level quality control with the support of data quality control software; and then the day data set is synthesized from the hour data. The daily data set includes information such as collection time, device name, data value, maximum value, maximum value (datavaluetmx), minimum value (datavaluemin), minimum value occurrence time (datavaluetmn). It can be used for daily change analysis of nitrogen oxide data of main air pollution gases.