For the ozone concentration data collected at Shangdianzi station in 2018, the first step is to conduct observer level quality control; secondly, with the support of data quality control software, hourly data is generated through expert level quality control; and then daily data set is synthesized from hourly data. The daily data set includes collection time, device name, data value, datavaluemax, datavaluetmx, datavaluemin, datavaluetmn and other information, which can be used for daily change analysis of ozone data of main air pollution gases.
|collect time||2018/01/01 - 2018/12/31|
|altitude||293.1m - 293.5m|
|data size||51.7 kB|
The t9i ozone analyzer produced by Thermo Fisher company was used to collect the concentration data of nitrogen dioxide at minute level. The data unit was ppb and the data format was excel (*. XLS).
First, the original data is filtered by singular value, zero span check and other processes to eliminate the problematic observation data. Then the data are corrected according to the calibration curve, and the hourly and daily mean values are calculated according to the effective data.
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