Data Quality Flags for ACE-FTS Level 2 Version 4.1/4.2 Data Set

Data quality flags generated for the Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS) Level 2 (L2) version 4.1/4.2 data products. These data quality flags are generated using the technique described in Sheese et al. (2015).
One netCDF file is produced for each species, isotopologue or parameter retrieved from the ACE-FTS spectra for version 4.1/4.2. Each file contains the data quality flags organized by occultation (orbit number and occultation type). Note, the ACE-FTS Level 2 version 4.1/4.2 profiles are not included in these files.
The data quality flag files are updated monthly as new Level 2 version 4.1/4.2 data are produced for ACE-FTS.

本数据集为大气化学实验傅里叶变换光谱仪（Atmospheric Chemistry Experiment Fourier Transform Spectrometer，简称ACE-FTS）二级（L2）4.1/4.2版数据产品配套生成的数据质量标志。此类数据质量标志基于Sheese等人（2015年）发表的技术方法生成。
针对ACE-FTS 4.1/4.2版光谱反演得到的各组分、同位素体或参数，分别生成一份netCDF（网络通用数据格式，Network Common Data Form）文件。每份文件包含按掩星事件（含轨道号与掩星类型）组织的数据质量标志。需注意，此类文件未包含ACE-FTS 4.1/4.2版二级大气廓线数据。
随着ACE-FTS新增L2 4.1/4.2版数据产出，此类数据质量标志文件将按月更新。